./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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/popl20-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --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 [2023-08-30 00:50:34,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:50:34,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:50:34,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:50:34,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:50:34,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:50:34,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:50:34,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:50:34,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:50:34,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:50:34,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:50:34,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:50:34,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:50:34,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:50:34,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:50:34,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:50:34,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:50:34,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:50:34,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:50:34,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:50:34,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:50:34,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:50:34,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:50:34,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:50:34,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:50:34,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:50:34,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:50:34,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:50:34,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:50:34,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:50:34,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:50:34,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:50:34,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:50:34,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:50:34,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:50:34,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:50:34,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:50:34,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:50:34,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:50:34,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:50:34,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:50:34,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:50:34,422 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:50:34,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:50:34,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:50:34,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:50:34,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:50:34,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:50:34,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:50:34,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:50:34,425 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:50:34,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:50:34,426 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:50:34,426 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:50:34,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:50:34,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:50:34,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:50:34,427 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:50:34,427 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:50:34,427 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:50:34,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:50:34,428 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:50:34,428 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:50:34,428 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:50:34,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:50:34,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:50:34,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:50:34,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:34,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:50:34,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:50:34,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:50:34,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:50:34,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:50:34,430 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:50:34,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:50:34,430 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:50:34,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:50:34,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:50:34,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:50:34,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:50:34,755 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:50:34,755 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:50:34,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 00:50:36,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:50:36,253 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:50:36,254 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 00:50:36,259 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa08f6316/30412b807e6c4133be674cf9a6138987/FLAGe24721f1a [2023-08-30 00:50:36,270 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa08f6316/30412b807e6c4133be674cf9a6138987 [2023-08-30 00:50:36,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:50:36,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:50:36,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:36,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:50:36,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:50:36,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:36" (1/1) ... [2023-08-30 00:50:36,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614ba9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:36, skipping insertion in model container [2023-08-30 00:50:36,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:36" (1/1) ... [2023-08-30 00:50:36,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:50:36,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:36,444 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 00:50:36,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:36,467 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:50:36,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43ddf9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:36, skipping insertion in model container [2023-08-30 00:50:36,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:36,470 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:50:36,471 INFO L158 Benchmark]: Toolchain (without parser) took 197.52ms. Allocated memory is still 92.3MB. Free memory was 69.2MB in the beginning and 58.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:50:36,473 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.7MB in the beginning and 40.7MB in the end (delta: 57.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:50:36,474 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.28ms. Allocated memory is still 92.3MB. Free memory was 69.0MB in the beginning and 58.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:50:36,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.7MB in the beginning and 40.7MB in the end (delta: 57.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.28ms. Allocated memory is still 92.3MB. Free memory was 69.0MB in the beginning and 58.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 125]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --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 [2023-08-30 00:50:38,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:50:38,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:50:38,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:50:38,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:50:38,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:50:38,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:50:38,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:50:38,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:50:38,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:50:38,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:50:38,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:50:38,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:50:38,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:50:38,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:50:38,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:50:38,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:50:38,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:50:38,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:50:38,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:50:38,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:50:38,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:50:38,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:50:38,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:50:38,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:50:38,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:50:38,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:50:38,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:50:38,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:50:38,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:50:38,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:50:38,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:50:38,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:50:38,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:50:38,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:50:38,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:50:38,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:50:38,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:50:38,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:50:38,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:50:38,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:50:38,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:50:38,363 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:50:38,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:50:38,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:50:38,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:50:38,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:50:38,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:50:38,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:50:38,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:50:38,366 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:50:38,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:50:38,367 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:50:38,368 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:50:38,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:50:38,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:50:38,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:50:38,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:50:38,368 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:50:38,369 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:50:38,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:50:38,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:50:38,369 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:50:38,369 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:50:38,369 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:50:38,370 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:50:38,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:50:38,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:50:38,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:50:38,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:38,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:50:38,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:50:38,371 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:50:38,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:50:38,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:50:38,372 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:50:38,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:50:38,372 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:50:38,372 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:50:38,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:50:38,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:50:38,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:50:38,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:50:38,691 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:50:38,691 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:50:38,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 00:50:39,759 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:50:39,978 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:50:39,979 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 00:50:39,984 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ba7bea8f/e899069565904da19bb2276fac7e87bf/FLAG887854810 [2023-08-30 00:50:40,001 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ba7bea8f/e899069565904da19bb2276fac7e87bf [2023-08-30 00:50:40,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:50:40,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:50:40,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:40,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:50:40,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:50:40,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2700396b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40, skipping insertion in model container [2023-08-30 00:50:40,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:50:40,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:40,200 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 00:50:40,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:40,219 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:50:40,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:40,232 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 00:50:40,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:40,239 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:50:40,258 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 00:50:40,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:40,270 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:50:40,270 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:50:40,276 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:50:40,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40 WrapperNode [2023-08-30 00:50:40,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:40,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:50:40,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:50:40,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:50:40,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,351 INFO L138 Inliner]: procedures = 27, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2023-08-30 00:50:40,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:50:40,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:50:40,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:50:40,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:50:40,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:50:40,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:50:40,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:50:40,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:50:40,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (1/1) ... [2023-08-30 00:50:40,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:40,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:50:40,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:50:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:50:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:50:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:50:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:50:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:50:40,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:50:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:50:40,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:50:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:50:40,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:50:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:50:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:50:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:50:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:50:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:50:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:50:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:50:40,507 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:50:40,634 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:50:40,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:50:41,026 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:50:41,178 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:50:41,185 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 00:50:41,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:50:41 BoogieIcfgContainer [2023-08-30 00:50:41,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:50:41,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:50:41,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:50:41,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:50:41,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:50:40" (1/3) ... [2023-08-30 00:50:41,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f3041d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:50:41, skipping insertion in model container [2023-08-30 00:50:41,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:40" (2/3) ... [2023-08-30 00:50:41,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f3041d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:50:41, skipping insertion in model container [2023-08-30 00:50:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:50:41" (3/3) ... [2023-08-30 00:50:41,196 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-30 00:50:41,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:50:41,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-08-30 00:50:41,212 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:50:41,299 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:50:41,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 166 transitions, 356 flow [2023-08-30 00:50:41,442 INFO L130 PetriNetUnfolder]: 11/163 cut-off events. [2023-08-30 00:50:41,443 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:50:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 11/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2023-08-30 00:50:41,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 166 transitions, 356 flow [2023-08-30 00:50:41,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 159 transitions, 336 flow [2023-08-30 00:50:41,470 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:50:41,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 159 transitions, 336 flow [2023-08-30 00:50:41,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 159 transitions, 336 flow [2023-08-30 00:50:41,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 159 transitions, 336 flow [2023-08-30 00:50:41,539 INFO L130 PetriNetUnfolder]: 11/159 cut-off events. [2023-08-30 00:50:41,542 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:50:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 159 events. 11/159 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2023-08-30 00:50:41,546 INFO L119 LiptonReduction]: Number of co-enabled transitions 1674 [2023-08-30 00:50:58,224 INFO L134 LiptonReduction]: Checked pairs total: 3569 [2023-08-30 00:50:58,224 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 00:50:58,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:50:58,240 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;@21dbd3de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:50:58,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-08-30 00:50:58,242 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:50:58,243 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:50:58,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:58,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:50:58,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:50:58,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash 21830, now seen corresponding path program 1 times [2023-08-30 00:50:58,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:50:58,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916448905] [2023-08-30 00:50:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:58,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:50:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:50:58,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:50:58,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:50:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:50:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:58,522 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:50:58,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:50:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:58,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:50:58,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:50:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916448905] [2023-08-30 00:50:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916448905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:50:58,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:50:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:50:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893702445] [2023-08-30 00:50:58,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:50:58,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:50:58,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:50:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:50:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:50:58,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-08-30 00:50:58,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:58,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:58,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-08-30 00:50:58,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:59,086 INFO L130 PetriNetUnfolder]: 1210/1759 cut-off events. [2023-08-30 00:50:59,086 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 00:50:59,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 1759 events. 1210/1759 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8185 event pairs, 878 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 3275. Up to 1698 conditions per place. [2023-08-30 00:50:59,102 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 00:50:59,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 180 flow [2023-08-30 00:50:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:50:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:50:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 00:50:59,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-08-30 00:50:59,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 00:50:59,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 00:50:59,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:59,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 00:50:59,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,140 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 106 flow. Second operand 3 states and 458 transitions. [2023-08-30 00:50:59,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 180 flow [2023-08-30 00:50:59,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:50:59,146 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 92 flow [2023-08-30 00:50:59,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-30 00:50:59,151 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 00:50:59,151 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 92 flow [2023-08-30 00:50:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:59,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:50:59,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:50:59,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:50:59,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash 21879, now seen corresponding path program 1 times [2023-08-30 00:50:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:50:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755675305] [2023-08-30 00:50:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:50:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:50:59,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:50:59,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:50:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:59,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:50:59,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:59,498 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-08-30 00:50:59,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-08-30 00:50:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:59,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:50:59,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:50:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755675305] [2023-08-30 00:50:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755675305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:50:59,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:50:59,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:50:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937565223] [2023-08-30 00:50:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:50:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:50:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:50:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:50:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:50:59,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-08-30 00:50:59,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:59,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-08-30 00:50:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:59,933 INFO L130 PetriNetUnfolder]: 1006/1482 cut-off events. [2023-08-30 00:50:59,934 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 00:50:59,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 1482 events. 1006/1482 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6794 event pairs, 722 based on Foata normal form. 0/709 useless extension candidates. Maximal degree in co-relation 2944. Up to 1421 conditions per place. [2023-08-30 00:50:59,942 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 00:50:59,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 162 flow [2023-08-30 00:50:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:50:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:50:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 00:50:59,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-08-30 00:50:59,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 00:50:59,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 00:50:59,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:59,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 00:50:59,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,950 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 92 flow. Second operand 3 states and 456 transitions. [2023-08-30 00:50:59,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 162 flow [2023-08-30 00:50:59,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:50:59,953 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 89 flow [2023-08-30 00:50:59,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-30 00:50:59,954 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-08-30 00:50:59,954 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 89 flow [2023-08-30 00:50:59,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:59,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:50:59,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:00,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:00,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-08-30 00:51:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:00,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293283089] [2023-08-30 00:51:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:00,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:00,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:00,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:51:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:51:00,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:00,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:00,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:00,352 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:51:00,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:51:00,384 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:51:00,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:51:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:00,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:00,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293283089] [2023-08-30 00:51:00,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293283089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:00,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:00,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811708352] [2023-08-30 00:51:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:00,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:00,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:51:00,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:00,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:00,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:51:00,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:00,889 INFO L130 PetriNetUnfolder]: 802/1205 cut-off events. [2023-08-30 00:51:00,889 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 00:51:00,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 1205 events. 802/1205 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5459 event pairs, 566 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 2390. Up to 1144 conditions per place. [2023-08-30 00:51:00,896 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 00:51:00,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 155 flow [2023-08-30 00:51:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 00:51:00,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574574574574575 [2023-08-30 00:51:00,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 00:51:00,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 00:51:00,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:00,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 00:51:00,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:00,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:00,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:00,907 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 89 flow. Second operand 3 states and 457 transitions. [2023-08-30 00:51:00,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 155 flow [2023-08-30 00:51:00,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:00,909 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 86 flow [2023-08-30 00:51:00,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-30 00:51:00,914 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-08-30 00:51:00,914 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 86 flow [2023-08-30 00:51:00,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:00,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:00,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:51:00,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:01,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:01,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash 21831, now seen corresponding path program 1 times [2023-08-30 00:51:01,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:01,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498073483] [2023-08-30 00:51:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:01,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:01,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:01,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:01,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:51:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:51:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:01,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:01,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:01,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:01,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:01,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498073483] [2023-08-30 00:51:01,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498073483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:01,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:01,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63197828] [2023-08-30 00:51:01,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:01,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:01,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:01,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-08-30 00:51:01,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:01,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:01,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-08-30 00:51:01,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:01,887 INFO L130 PetriNetUnfolder]: 1603/2408 cut-off events. [2023-08-30 00:51:01,887 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:51:01,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 2408 events. 1603/2408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 12635 event pairs, 1132 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 4778. Up to 1145 conditions per place. [2023-08-30 00:51:01,899 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 66 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-30 00:51:01,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 294 flow [2023-08-30 00:51:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-30 00:51:01,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-30 00:51:01,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-30 00:51:01,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-30 00:51:01,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:01,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-30 00:51:01,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:01,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:01,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:01,906 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 86 flow. Second operand 3 states and 486 transitions. [2023-08-30 00:51:01,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 294 flow [2023-08-30 00:51:01,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:01,908 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 97 flow [2023-08-30 00:51:01,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-30 00:51:01,909 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 00:51:01,909 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 97 flow [2023-08-30 00:51:01,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:01,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:01,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:51:01,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:02,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:02,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:02,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:02,132 INFO L85 PathProgramCache]: Analyzing trace with hash 678535, now seen corresponding path program 1 times [2023-08-30 00:51:02,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:02,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295126286] [2023-08-30 00:51:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:02,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:02,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:02,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:51:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:51:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:02,292 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:02,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:02,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:02,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:02,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295126286] [2023-08-30 00:51:02,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295126286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:02,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:02,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:51:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843498058] [2023-08-30 00:51:02,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:51:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:51:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:51:03,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 00:51:03,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:03,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 00:51:03,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:03,691 INFO L130 PetriNetUnfolder]: 2406/3615 cut-off events. [2023-08-30 00:51:03,692 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 00:51:03,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 3615 events. 2406/3615 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 20328 event pairs, 1698 based on Foata normal form. 0/1850 useless extension candidates. Maximal degree in co-relation 7181. Up to 1144 conditions per place. [2023-08-30 00:51:03,710 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 98 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2023-08-30 00:51:03,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 108 transitions, 463 flow [2023-08-30 00:51:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:51:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:51:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 912 transitions. [2023-08-30 00:51:03,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-08-30 00:51:03,714 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 912 transitions. [2023-08-30 00:51:03,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 912 transitions. [2023-08-30 00:51:03,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:03,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 912 transitions. [2023-08-30 00:51:03,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.0) internal successors, (912), 6 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,720 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 97 flow. Second operand 6 states and 912 transitions. [2023-08-30 00:51:03,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 108 transitions, 463 flow [2023-08-30 00:51:03,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 108 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:03,724 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 149 flow [2023-08-30 00:51:03,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 00:51:03,727 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-30 00:51:03,727 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 149 flow [2023-08-30 00:51:03,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:03,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:51:03,744 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 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:03,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:03,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:03,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 21043134, now seen corresponding path program 1 times [2023-08-30 00:51:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:03,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541250995] [2023-08-30 00:51:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:03,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:03,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:03,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:03,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:51:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:51:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:04,055 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-30 00:51:04,055 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 4 case distinctions, treesize of input 29 treesize of output 44 [2023-08-30 00:51:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:04,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:04,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:04,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541250995] [2023-08-30 00:51:04,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541250995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:04,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:04,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355929412] [2023-08-30 00:51:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:04,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:51:04,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:04,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:04,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:51:04,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:04,570 INFO L130 PetriNetUnfolder]: 2334/3489 cut-off events. [2023-08-30 00:51:04,571 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 00:51:04,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 3489 events. 2334/3489 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 19458 event pairs, 1638 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 6949. Up to 3306 conditions per place. [2023-08-30 00:51:04,594 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 00:51:04,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 223 flow [2023-08-30 00:51:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-30 00:51:04,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44344344344344344 [2023-08-30 00:51:04,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-30 00:51:04,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-30 00:51:04,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:04,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-30 00:51:04,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:04,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:04,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:04,601 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 149 flow. Second operand 3 states and 443 transitions. [2023-08-30 00:51:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 223 flow [2023-08-30 00:51:04,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 213 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:04,604 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2023-08-30 00:51:04,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-30 00:51:04,607 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-30 00:51:04,607 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2023-08-30 00:51:04,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:04,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:04,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:51:04,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:04,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:04,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:04,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash 21043135, now seen corresponding path program 1 times [2023-08-30 00:51:04,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:04,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453613034] [2023-08-30 00:51:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:04,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:04,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:04,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:04,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:51:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:04,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:51:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:04,984 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 00:51:04,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 00:51:05,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 00:51:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:05,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:05,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453613034] [2023-08-30 00:51:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453613034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:05,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:05,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97350111] [2023-08-30 00:51:05,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:05,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:05,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:05,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:51:05,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:05,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:05,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:51:05,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:05,581 INFO L130 PetriNetUnfolder]: 2262/3363 cut-off events. [2023-08-30 00:51:05,581 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 00:51:05,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 3363 events. 2262/3363 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 18583 event pairs, 1578 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 6693. Up to 3180 conditions per place. [2023-08-30 00:51:05,598 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 00:51:05,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 207 flow [2023-08-30 00:51:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-30 00:51:05,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-08-30 00:51:05,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-30 00:51:05,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-30 00:51:05,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:05,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-30 00:51:05,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:05,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:05,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:05,604 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 3 states and 453 transitions. [2023-08-30 00:51:05,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 207 flow [2023-08-30 00:51:05,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:05,607 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 134 flow [2023-08-30 00:51:05,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-30 00:51:05,608 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 00:51:05,608 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 134 flow [2023-08-30 00:51:05,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:05,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:05,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:51:05,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:05,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:05,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:05,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash 652332668, now seen corresponding path program 1 times [2023-08-30 00:51:05,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:05,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358053293] [2023-08-30 00:51:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:05,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:05,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:05,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:51:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:51:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:05,937 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:51:05,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:51:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:05,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:05,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:05,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358053293] [2023-08-30 00:51:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358053293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:05,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:05,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:51:05,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392229113] [2023-08-30 00:51:05,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:05,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:51:05,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:51:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:51:06,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:51:06,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:06,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:06,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:51:06,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:06,365 INFO L130 PetriNetUnfolder]: 1524/2328 cut-off events. [2023-08-30 00:51:06,365 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:51:06,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 2328 events. 1524/2328 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 12335 event pairs, 1074 based on Foata normal form. 0/1401 useless extension candidates. Maximal degree in co-relation 4617. Up to 2168 conditions per place. [2023-08-30 00:51:06,376 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-30 00:51:06,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 200 flow [2023-08-30 00:51:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:51:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:51:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-30 00:51:06,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346846846846847 [2023-08-30 00:51:06,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-30 00:51:06,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-30 00:51:06,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:06,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-30 00:51:06,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:06,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:06,400 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:06,401 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 134 flow. Second operand 4 states and 579 transitions. [2023-08-30 00:51:06,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 200 flow [2023-08-30 00:51:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:06,402 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 137 flow [2023-08-30 00:51:06,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-30 00:51:06,402 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 00:51:06,402 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 137 flow [2023-08-30 00:51:06,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:06,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:06,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:51:06,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:06,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:06,603 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:06,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 652332669, now seen corresponding path program 1 times [2023-08-30 00:51:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:06,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168538648] [2023-08-30 00:51:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:06,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:06,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:51:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:51:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:06,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:06,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168538648] [2023-08-30 00:51:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168538648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:06,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:51:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77755804] [2023-08-30 00:51:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:51:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:51:06,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:51:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:51:06,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:06,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:06,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:51:06,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:07,097 INFO L130 PetriNetUnfolder]: 1136/1776 cut-off events. [2023-08-30 00:51:07,097 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 00:51:07,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3568 conditions, 1776 events. 1136/1776 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9229 event pairs, 835 based on Foata normal form. 26/1137 useless extension candidates. Maximal degree in co-relation 3550. Up to 1453 conditions per place. [2023-08-30 00:51:07,105 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-30 00:51:07,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 307 flow [2023-08-30 00:51:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:51:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:51:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-30 00:51:07,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-08-30 00:51:07,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-30 00:51:07,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-30 00:51:07,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:07,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-30 00:51:07,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:07,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:07,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:07,111 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 137 flow. Second operand 4 states and 616 transitions. [2023-08-30 00:51:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 307 flow [2023-08-30 00:51:07,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:51:07,114 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 159 flow [2023-08-30 00:51:07,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-30 00:51:07,115 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-30 00:51:07,115 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 159 flow [2023-08-30 00:51:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:07,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:07,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:51:07,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:07,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:07,330 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:07,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1258634947, now seen corresponding path program 1 times [2023-08-30 00:51:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:07,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860442858] [2023-08-30 00:51:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:07,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:07,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:51:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:51:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:07,523 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:07,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:08,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:08,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860442858] [2023-08-30 00:51:08,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860442858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:08,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:51:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159115954] [2023-08-30 00:51:08,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:51:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:51:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:51:09,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 00:51:09,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:09,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:09,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 00:51:09,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:13,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:51:15,339 INFO L130 PetriNetUnfolder]: 1246/1986 cut-off events. [2023-08-30 00:51:15,339 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-08-30 00:51:15,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 1986 events. 1246/1986 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10299 event pairs, 921 based on Foata normal form. 134/1684 useless extension candidates. Maximal degree in co-relation 4309. Up to 722 conditions per place. [2023-08-30 00:51:15,345 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 93 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-08-30 00:51:15,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 107 transitions, 536 flow [2023-08-30 00:51:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:51:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:51:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1408 transitions. [2023-08-30 00:51:15,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228228228228228 [2023-08-30 00:51:15,352 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1408 transitions. [2023-08-30 00:51:15,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1408 transitions. [2023-08-30 00:51:15,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:15,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1408 transitions. [2023-08-30 00:51:15,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.8) internal successors, (1408), 10 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:15,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:15,360 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:15,360 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 159 flow. Second operand 10 states and 1408 transitions. [2023-08-30 00:51:15,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 107 transitions, 536 flow [2023-08-30 00:51:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 107 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 00:51:15,363 INFO L231 Difference]: Finished difference. Result has 63 places, 40 transitions, 191 flow [2023-08-30 00:51:15,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=191, PETRI_PLACES=63, PETRI_TRANSITIONS=40} [2023-08-30 00:51:15,363 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-30 00:51:15,363 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 40 transitions, 191 flow [2023-08-30 00:51:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:15,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:15,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:51:15,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:15,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:15,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1252367159, now seen corresponding path program 1 times [2023-08-30 00:51:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998606711] [2023-08-30 00:51:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:15,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:15,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:15,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:15,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:51:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:51:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:15,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:51:15,739 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 00:51:15,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 00:51:15,760 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 88 treesize of output 84 [2023-08-30 00:51:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:15,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:15,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:15,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998606711] [2023-08-30 00:51:15,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998606711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:15,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:15,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811356874] [2023-08-30 00:51:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:15,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:15,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:15,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:15,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:51:15,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 40 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:15,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:15,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:51:15,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:16,109 INFO L130 PetriNetUnfolder]: 1098/1751 cut-off events. [2023-08-30 00:51:16,109 INFO L131 PetriNetUnfolder]: For 661/661 co-relation queries the response was YES. [2023-08-30 00:51:16,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 1751 events. 1098/1751 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9031 event pairs, 817 based on Foata normal form. 0/1458 useless extension candidates. Maximal degree in co-relation 4054. Up to 1643 conditions per place. [2023-08-30 00:51:16,117 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 00:51:16,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 257 flow [2023-08-30 00:51:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-30 00:51:16,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494494494494494 [2023-08-30 00:51:16,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-30 00:51:16,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-30 00:51:16,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:16,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-30 00:51:16,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:16,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:16,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:16,124 INFO L175 Difference]: Start difference. First operand has 63 places, 40 transitions, 191 flow. Second operand 3 states and 449 transitions. [2023-08-30 00:51:16,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 257 flow [2023-08-30 00:51:16,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 38 transitions, 207 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 00:51:16,126 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 139 flow [2023-08-30 00:51:16,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-30 00:51:16,127 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-30 00:51:16,127 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 139 flow [2023-08-30 00:51:16,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:16,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:16,128 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:51:16,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:16,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:16,337 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:16,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1258838713, now seen corresponding path program 2 times [2023-08-30 00:51:16,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:16,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935153314] [2023-08-30 00:51:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:51:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:16,339 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:51:16,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:51:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:16,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:51:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:16,506 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:16,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:16,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:17,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935153314] [2023-08-30 00:51:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935153314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:17,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:17,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:51:17,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87587327] [2023-08-30 00:51:17,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:51:17,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:51:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:51:20,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 00:51:20,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:20,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:20,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 00:51:20,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:24,004 INFO L130 PetriNetUnfolder]: 3600/5590 cut-off events. [2023-08-30 00:51:24,004 INFO L131 PetriNetUnfolder]: For 3767/3767 co-relation queries the response was YES. [2023-08-30 00:51:24,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13810 conditions, 5590 events. 3600/5590 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32688 event pairs, 2599 based on Foata normal form. 6/4730 useless extension candidates. Maximal degree in co-relation 13792. Up to 1315 conditions per place. [2023-08-30 00:51:24,032 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 232 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2023-08-30 00:51:24,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 247 transitions, 1239 flow [2023-08-30 00:51:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:51:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:51:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1870 transitions. [2023-08-30 00:51:24,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46796796796796797 [2023-08-30 00:51:24,040 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1870 transitions. [2023-08-30 00:51:24,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1870 transitions. [2023-08-30 00:51:24,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:24,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1870 transitions. [2023-08-30 00:51:24,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:24,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:24,084 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:24,084 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 139 flow. Second operand 12 states and 1870 transitions. [2023-08-30 00:51:24,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 247 transitions, 1239 flow [2023-08-30 00:51:24,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 247 transitions, 1238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:24,093 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 236 flow [2023-08-30 00:51:24,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=236, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-08-30 00:51:24,095 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-30 00:51:24,095 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 236 flow [2023-08-30 00:51:24,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:24,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:24,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:51:24,109 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 [2023-08-30 00:51:24,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:24,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:24,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1252367158, now seen corresponding path program 1 times [2023-08-30 00:51:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:24,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553027025] [2023-08-30 00:51:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:24,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:24,308 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:24,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:51:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:51:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:24,454 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:51:24,454 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 29 [2023-08-30 00:51:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:24,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:24,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553027025] [2023-08-30 00:51:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553027025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:24,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:24,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:24,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697871458] [2023-08-30 00:51:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:24,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:51:24,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:24,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:24,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:51:24,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:25,120 INFO L130 PetriNetUnfolder]: 3236/5083 cut-off events. [2023-08-30 00:51:25,121 INFO L131 PetriNetUnfolder]: For 2799/2799 co-relation queries the response was YES. [2023-08-30 00:51:25,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12313 conditions, 5083 events. 3236/5083 cut-off events. For 2799/2799 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29775 event pairs, 2265 based on Foata normal form. 0/4516 useless extension candidates. Maximal degree in co-relation 12287. Up to 4569 conditions per place. [2023-08-30 00:51:25,145 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 00:51:25,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 312 flow [2023-08-30 00:51:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-30 00:51:25,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2023-08-30 00:51:25,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-30 00:51:25,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-30 00:51:25,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:25,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-30 00:51:25,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,151 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 236 flow. Second operand 3 states and 435 transitions. [2023-08-30 00:51:25,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 312 flow [2023-08-30 00:51:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 43 transitions, 290 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:51:25,156 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 212 flow [2023-08-30 00:51:25,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-08-30 00:51:25,156 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-30 00:51:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 212 flow [2023-08-30 00:51:25,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:25,157 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 00:51:25,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:25,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:25,367 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:25,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1592295037, now seen corresponding path program 2 times [2023-08-30 00:51:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821278824] [2023-08-30 00:51:25,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:51:25,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:25,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:25,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:51:25,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:51:25,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:51:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:25,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:25,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:51:25,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:25,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821278824] [2023-08-30 00:51:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821278824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:25,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:25,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:51:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374809930] [2023-08-30 00:51:25,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:25,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:51:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:25,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:51:25,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:51:25,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:51:25,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:25,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:51:25,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:26,239 INFO L130 PetriNetUnfolder]: 2072/3372 cut-off events. [2023-08-30 00:51:26,239 INFO L131 PetriNetUnfolder]: For 2544/2544 co-relation queries the response was YES. [2023-08-30 00:51:26,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7050 conditions, 3372 events. 2072/3372 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18839 event pairs, 1469 based on Foata normal form. 468/3403 useless extension candidates. Maximal degree in co-relation 7023. Up to 2966 conditions per place. [2023-08-30 00:51:26,253 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-08-30 00:51:26,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 41 transitions, 272 flow [2023-08-30 00:51:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:51:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:51:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-08-30 00:51:26,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271771771771772 [2023-08-30 00:51:26,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-08-30 00:51:26,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-08-30 00:51:26,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:26,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-08-30 00:51:26,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:26,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:26,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:26,260 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 212 flow. Second operand 4 states and 569 transitions. [2023-08-30 00:51:26,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 41 transitions, 272 flow [2023-08-30 00:51:26,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 41 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:51:26,262 INFO L231 Difference]: Finished difference. Result has 65 places, 41 transitions, 206 flow [2023-08-30 00:51:26,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2023-08-30 00:51:26,263 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-30 00:51:26,263 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 206 flow [2023-08-30 00:51:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:26,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:26,263 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:51:26,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-30 00:51:26,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:26,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:26,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 668966215, now seen corresponding path program 3 times [2023-08-30 00:51:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519568008] [2023-08-30 00:51:26,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:51:26,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:26,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:26,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:51:26,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:51:26,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:51:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:26,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:26,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:27,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:29,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519568008] [2023-08-30 00:51:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519568008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:29,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:29,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:51:29,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628426694] [2023-08-30 00:51:29,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:51:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:29,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:51:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:51:41,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 00:51:41,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 206 flow. Second operand has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:41,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:41,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 00:51:41,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:57,595 INFO L130 PetriNetUnfolder]: 5030/8053 cut-off events. [2023-08-30 00:51:57,595 INFO L131 PetriNetUnfolder]: For 1337/1337 co-relation queries the response was YES. [2023-08-30 00:51:57,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17348 conditions, 8053 events. 5030/8053 cut-off events. For 1337/1337 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 46969 event pairs, 3705 based on Foata normal form. 12/6973 useless extension candidates. Maximal degree in co-relation 17322. Up to 1135 conditions per place. [2023-08-30 00:51:57,620 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 439 selfloop transitions, 24 changer transitions 1/467 dead transitions. [2023-08-30 00:51:57,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 467 transitions, 2400 flow [2023-08-30 00:51:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:51:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:51:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3716 transitions. [2023-08-30 00:51:57,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464964964964965 [2023-08-30 00:51:57,630 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3716 transitions. [2023-08-30 00:51:57,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3716 transitions. [2023-08-30 00:51:57,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:57,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3716 transitions. [2023-08-30 00:51:57,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 154.83333333333334) internal successors, (3716), 24 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:57,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:57,659 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:57,660 INFO L175 Difference]: Start difference. First operand has 65 places, 41 transitions, 206 flow. Second operand 24 states and 3716 transitions. [2023-08-30 00:51:57,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 467 transitions, 2400 flow [2023-08-30 00:51:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 467 transitions, 2375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:51:57,668 INFO L231 Difference]: Finished difference. Result has 99 places, 54 transitions, 385 flow [2023-08-30 00:51:57,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=385, PETRI_PLACES=99, PETRI_TRANSITIONS=54} [2023-08-30 00:51:57,668 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2023-08-30 00:51:57,668 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 54 transitions, 385 flow [2023-08-30 00:51:57,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:57,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:57,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:57,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:57,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:57,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:57,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:57,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2035185124, now seen corresponding path program 1 times [2023-08-30 00:51:57,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:57,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921132710] [2023-08-30 00:51:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:57,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:57,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:57,875 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:57,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:51:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:57,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:51:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:57,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:57,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:57,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921132710] [2023-08-30 00:51:57,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921132710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:57,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:57,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:51:57,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522156309] [2023-08-30 00:51:57,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:51:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:51:57,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:51:57,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:51:57,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 54 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:57,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:57,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:51:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:58,795 INFO L130 PetriNetUnfolder]: 5044/8395 cut-off events. [2023-08-30 00:51:58,795 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-08-30 00:51:58,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18145 conditions, 8395 events. 5044/8395 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 53403 event pairs, 304 based on Foata normal form. 610/7894 useless extension candidates. Maximal degree in co-relation 18106. Up to 2744 conditions per place. [2023-08-30 00:51:58,825 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 73 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-30 00:51:58,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 80 transitions, 607 flow [2023-08-30 00:51:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:51:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:51:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-08-30 00:51:58,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45165165165165166 [2023-08-30 00:51:58,828 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-08-30 00:51:58,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-08-30 00:51:58,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:58,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-08-30 00:51:58,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:58,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:58,832 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:58,832 INFO L175 Difference]: Start difference. First operand has 99 places, 54 transitions, 385 flow. Second operand 5 states and 752 transitions. [2023-08-30 00:51:58,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 80 transitions, 607 flow [2023-08-30 00:51:58,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 556 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-30 00:51:58,839 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 365 flow [2023-08-30 00:51:58,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2023-08-30 00:51:58,840 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-08-30 00:51:58,840 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 365 flow [2023-08-30 00:51:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:58,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:58,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:58,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:59,045 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:51:59,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:59,045 INFO L85 PathProgramCache]: Analyzing trace with hash 936620446, now seen corresponding path program 2 times [2023-08-30 00:51:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:59,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20993124] [2023-08-30 00:51:59,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:51:59,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:59,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:59,047 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:59,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:51:59,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:51:59,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:51:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:59,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:59,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20993124] [2023-08-30 00:51:59,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20993124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:59,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:59,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:51:59,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809246468] [2023-08-30 00:51:59,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:59,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:51:59,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:51:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:51:59,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:51:59,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:59,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:59,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:51:59,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:00,978 INFO L130 PetriNetUnfolder]: 10639/16343 cut-off events. [2023-08-30 00:52:00,979 INFO L131 PetriNetUnfolder]: For 5532/5532 co-relation queries the response was YES. [2023-08-30 00:52:01,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 16343 events. 10639/16343 cut-off events. For 5532/5532 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 102560 event pairs, 739 based on Foata normal form. 408/14414 useless extension candidates. Maximal degree in co-relation 40447. Up to 5960 conditions per place. [2023-08-30 00:52:01,029 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 77 selfloop transitions, 11 changer transitions 5/94 dead transitions. [2023-08-30 00:52:01,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 653 flow [2023-08-30 00:52:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:52:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:52:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1017 transitions. [2023-08-30 00:52:01,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362934362934363 [2023-08-30 00:52:01,033 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1017 transitions. [2023-08-30 00:52:01,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1017 transitions. [2023-08-30 00:52:01,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:01,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1017 transitions. [2023-08-30 00:52:01,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.28571428571428) internal successors, (1017), 7 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:01,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:01,038 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:01,038 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 365 flow. Second operand 7 states and 1017 transitions. [2023-08-30 00:52:01,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 653 flow [2023-08-30 00:52:01,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 649 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:52:01,044 INFO L231 Difference]: Finished difference. Result has 102 places, 55 transitions, 381 flow [2023-08-30 00:52:01,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=102, PETRI_TRANSITIONS=55} [2023-08-30 00:52:01,045 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2023-08-30 00:52:01,045 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 55 transitions, 381 flow [2023-08-30 00:52:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:01,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:01,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:52:01,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:52:01,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:01,254 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:52:01,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:01,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1631084858, now seen corresponding path program 1 times [2023-08-30 00:52:01,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:01,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50404270] [2023-08-30 00:52:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:52:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:01,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:52:01,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:52:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:52:01,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:52:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:52:01,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:52:01,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:01,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50404270] [2023-08-30 00:52:01,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50404270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:52:01,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:52:01,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:52:01,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605718173] [2023-08-30 00:52:01,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:52:01,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:52:01,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:52:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:52:01,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-08-30 00:52:01,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 55 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:01,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:01,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-08-30 00:52:01,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:02,220 INFO L130 PetriNetUnfolder]: 4083/7667 cut-off events. [2023-08-30 00:52:02,220 INFO L131 PetriNetUnfolder]: For 11273/11273 co-relation queries the response was YES. [2023-08-30 00:52:02,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21818 conditions, 7667 events. 4083/7667 cut-off events. For 11273/11273 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 53361 event pairs, 1740 based on Foata normal form. 280/7067 useless extension candidates. Maximal degree in co-relation 21772. Up to 5261 conditions per place. [2023-08-30 00:52:02,265 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 56 selfloop transitions, 2 changer transitions 3/66 dead transitions. [2023-08-30 00:52:02,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 66 transitions, 537 flow [2023-08-30 00:52:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:52:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:52:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 00:52:02,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 00:52:02,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 00:52:02,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 00:52:02,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:02,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 00:52:02,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,270 INFO L175 Difference]: Start difference. First operand has 102 places, 55 transitions, 381 flow. Second operand 3 states and 461 transitions. [2023-08-30 00:52:02,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 66 transitions, 537 flow [2023-08-30 00:52:02,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 66 transitions, 505 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 00:52:02,308 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 367 flow [2023-08-30 00:52:02,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-08-30 00:52:02,309 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-08-30 00:52:02,309 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 367 flow [2023-08-30 00:52:02,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:02,309 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 00:52:02,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:52:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:02,519 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:52:02,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -643723961, now seen corresponding path program 4 times [2023-08-30 00:52:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903994337] [2023-08-30 00:52:02,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:52:02,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:02,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:02,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:52:02,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:52:02,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:52:02,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:52:02,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 00:52:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:02,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:52:02,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:52:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:03,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:52:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:12,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:12,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903994337] [2023-08-30 00:52:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903994337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:52:12,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:52:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 00:52:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343025007] [2023-08-30 00:52:12,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:52:12,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 00:52:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 00:52:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 00:53:10,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 00:53:10,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 367 flow. Second operand has 48 states, 48 states have (on average 136.0) internal successors, (6528), 48 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:10,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:53:10,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 00:53:10,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:53:33,667 WARN L222 SmtUtils]: Spent 15.48s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:53:51,300 WARN L222 SmtUtils]: Spent 16.14s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:54:05,002 WARN L222 SmtUtils]: Spent 12.29s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:54:14,816 WARN L222 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:54:24,840 WARN L222 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:54:33,259 WARN L222 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:55:33,260 INFO L130 PetriNetUnfolder]: 9182/17240 cut-off events. [2023-08-30 00:55:33,260 INFO L131 PetriNetUnfolder]: For 22077/22077 co-relation queries the response was YES. [2023-08-30 00:55:33,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 17240 events. 9182/17240 cut-off events. For 22077/22077 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 124062 event pairs, 7110 based on Foata normal form. 24/15408 useless extension candidates. Maximal degree in co-relation 47718. Up to 3691 conditions per place. [2023-08-30 00:55:33,348 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 947 selfloop transitions, 48 changer transitions 0/1000 dead transitions. [2023-08-30 00:55:33,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 1000 transitions, 6094 flow [2023-08-30 00:55:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 00:55:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 00:55:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7454 transitions. [2023-08-30 00:55:33,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634134134134136 [2023-08-30 00:55:33,355 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7454 transitions. [2023-08-30 00:55:33,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7454 transitions. [2023-08-30 00:55:33,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:33,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7454 transitions. [2023-08-30 00:55:33,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 155.29166666666666) internal successors, (7454), 48 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 333.0) internal successors, (16317), 49 states have internal predecessors, (16317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,386 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 333.0) internal successors, (16317), 49 states have internal predecessors, (16317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,386 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 367 flow. Second operand 48 states and 7454 transitions. [2023-08-30 00:55:33,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 1000 transitions, 6094 flow [2023-08-30 00:55:33,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1000 transitions, 5778 flow, removed 135 selfloop flow, removed 2 redundant places. [2023-08-30 00:55:33,632 INFO L231 Difference]: Finished difference. Result has 165 places, 81 transitions, 717 flow [2023-08-30 00:55:33,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=717, PETRI_PLACES=165, PETRI_TRANSITIONS=81} [2023-08-30 00:55:33,633 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2023-08-30 00:55:33,633 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 81 transitions, 717 flow [2023-08-30 00:55:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 136.0) internal successors, (6528), 48 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:33,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:55:33,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:55:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:33,835 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:55:33,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1027074895, now seen corresponding path program 1 times [2023-08-30 00:55:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:33,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509772589] [2023-08-30 00:55:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:33,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:33,837 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:33,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:55:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:55:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:55:34,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:55:34,643 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 00:55:34,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-08-30 00:55:41,543 WARN L222 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 98 DAG size of output: 23 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:55:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:55:42,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509772589] [2023-08-30 00:55:42,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509772589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:55:42,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:55:42,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 00:55:42,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682523739] [2023-08-30 00:55:42,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:55:42,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:55:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:55:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:55:43,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 333 [2023-08-30 00:55:43,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 81 transitions, 717 flow. Second operand has 20 states, 20 states have (on average 122.2) internal successors, (2444), 20 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:43,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:43,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 333 [2023-08-30 00:55:43,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:55,939 INFO L130 PetriNetUnfolder]: 29972/50810 cut-off events. [2023-08-30 00:55:55,939 INFO L131 PetriNetUnfolder]: For 28029/28029 co-relation queries the response was YES. [2023-08-30 00:55:56,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134128 conditions, 50810 events. 29972/50810 cut-off events. For 28029/28029 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 377069 event pairs, 540 based on Foata normal form. 1080/47705 useless extension candidates. Maximal degree in co-relation 134059. Up to 11295 conditions per place. [2023-08-30 00:55:56,430 INFO L137 encePairwiseOnDemand]: 319/333 looper letters, 196 selfloop transitions, 55 changer transitions 12/263 dead transitions. [2023-08-30 00:55:56,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 1764 flow [2023-08-30 00:55:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 00:55:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 00:55:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3451 transitions. [2023-08-30 00:55:56,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38382827271716163 [2023-08-30 00:55:56,434 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3451 transitions. [2023-08-30 00:55:56,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3451 transitions. [2023-08-30 00:55:56,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:56,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3451 transitions. [2023-08-30 00:55:56,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 127.81481481481481) internal successors, (3451), 27 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:56,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:56,445 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:56,445 INFO L175 Difference]: Start difference. First operand has 165 places, 81 transitions, 717 flow. Second operand 27 states and 3451 transitions. [2023-08-30 00:55:56,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 1764 flow [2023-08-30 00:55:56,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 263 transitions, 1668 flow, removed 25 selfloop flow, removed 22 redundant places. [2023-08-30 00:55:56,633 INFO L231 Difference]: Finished difference. Result has 180 places, 129 transitions, 990 flow [2023-08-30 00:55:56,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=990, PETRI_PLACES=180, PETRI_TRANSITIONS=129} [2023-08-30 00:55:56,633 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2023-08-30 00:55:56,634 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 129 transitions, 990 flow [2023-08-30 00:55:56,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.2) internal successors, (2444), 20 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:56,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:56,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:55:56,645 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 (21)] Ended with exit code 0 [2023-08-30 00:55:56,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:56,846 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:55:56,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2064249089, now seen corresponding path program 2 times [2023-08-30 00:55:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300820372] [2023-08-30 00:55:56,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:55:56,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:56,847 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:56,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:55:57,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:55:57,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:55:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 00:55:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:57,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 00:55:57,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:55:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:55:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:55:58,142 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd c_~d~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_732) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1))))) c_~W~0)) is different from false [2023-08-30 00:55:58,461 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 00:55:58,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-08-30 00:55:58,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:55:58,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-08-30 00:56:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:56:04,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:04,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300820372] [2023-08-30 00:56:04,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300820372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:56:04,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:56:04,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:56:04,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097814640] [2023-08-30 00:56:04,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:56:04,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:56:04,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:56:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=343, Unknown=2, NotChecked=38, Total=462 [2023-08-30 00:56:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 333 [2023-08-30 00:56:04,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 129 transitions, 990 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:04,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:04,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 333 [2023-08-30 00:56:04,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:56:32,849 INFO L130 PetriNetUnfolder]: 52715/90867 cut-off events. [2023-08-30 00:56:32,849 INFO L131 PetriNetUnfolder]: For 180320/180320 co-relation queries the response was YES. [2023-08-30 00:56:33,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338215 conditions, 90867 events. 52715/90867 cut-off events. For 180320/180320 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 757569 event pairs, 1672 based on Foata normal form. 264/91131 useless extension candidates. Maximal degree in co-relation 338134. Up to 20945 conditions per place. [2023-08-30 00:56:34,050 INFO L137 encePairwiseOnDemand]: 317/333 looper letters, 213 selfloop transitions, 125 changer transitions 68/406 dead transitions. [2023-08-30 00:56:34,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 406 transitions, 3270 flow [2023-08-30 00:56:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 00:56:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 00:56:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2947 transitions. [2023-08-30 00:56:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32777221666110556 [2023-08-30 00:56:34,056 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2947 transitions. [2023-08-30 00:56:34,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2947 transitions. [2023-08-30 00:56:34,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:56:34,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2947 transitions. [2023-08-30 00:56:34,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 109.14814814814815) internal successors, (2947), 27 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:34,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:34,223 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:34,223 INFO L175 Difference]: Start difference. First operand has 180 places, 129 transitions, 990 flow. Second operand 27 states and 2947 transitions. [2023-08-30 00:56:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 406 transitions, 3270 flow [2023-08-30 00:56:49,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 406 transitions, 2986 flow, removed 80 selfloop flow, removed 9 redundant places. [2023-08-30 00:56:49,815 INFO L231 Difference]: Finished difference. Result has 209 places, 221 transitions, 1865 flow [2023-08-30 00:56:49,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1865, PETRI_PLACES=209, PETRI_TRANSITIONS=221} [2023-08-30 00:56:49,816 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2023-08-30 00:56:49,816 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 221 transitions, 1865 flow [2023-08-30 00:56:49,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:49,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:49,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:56:49,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:50,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:50,020 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:56:50,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash -268424735, now seen corresponding path program 3 times [2023-08-30 00:56:50,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:56:50,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899289838] [2023-08-30 00:56:50,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:56:50,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:50,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:56:50,022 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:56:50,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:56:50,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:56:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:56:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:56:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:56:50,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:56:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:56:51,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:56:52,161 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 00:56:52,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-08-30 00:56:52,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:56:52,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-08-30 00:56:58,547 WARN L222 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 118 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:56:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:56:59,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899289838] [2023-08-30 00:56:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899289838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:56:59,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:56:59,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:56:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909281899] [2023-08-30 00:56:59,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:56:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:56:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:56:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=378, Unknown=2, NotChecked=0, Total=462 [2023-08-30 00:57:03,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 333 [2023-08-30 00:57:03,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 221 transitions, 1865 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:03,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:03,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 333 [2023-08-30 00:57:03,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:35,726 INFO L130 PetriNetUnfolder]: 61559/106091 cut-off events. [2023-08-30 00:57:35,727 INFO L131 PetriNetUnfolder]: For 410484/410484 co-relation queries the response was YES. [2023-08-30 00:57:36,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514401 conditions, 106091 events. 61559/106091 cut-off events. For 410484/410484 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 895768 event pairs, 3388 based on Foata normal form. 264/106355 useless extension candidates. Maximal degree in co-relation 514312. Up to 24816 conditions per place. [2023-08-30 00:57:37,233 INFO L137 encePairwiseOnDemand]: 321/333 looper letters, 225 selfloop transitions, 176 changer transitions 74/475 dead transitions. [2023-08-30 00:57:37,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 475 transitions, 4838 flow [2023-08-30 00:57:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:57:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:57:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2829 transitions. [2023-08-30 00:57:37,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267498267498268 [2023-08-30 00:57:37,239 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2829 transitions. [2023-08-30 00:57:37,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2829 transitions. [2023-08-30 00:57:37,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:37,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2829 transitions. [2023-08-30 00:57:37,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 108.8076923076923) internal successors, (2829), 26 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:37,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:37,252 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:37,252 INFO L175 Difference]: Start difference. First operand has 209 places, 221 transitions, 1865 flow. Second operand 26 states and 2829 transitions. [2023-08-30 00:57:37,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 475 transitions, 4838 flow [2023-08-30 00:58:14,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 475 transitions, 4296 flow, removed 236 selfloop flow, removed 8 redundant places. [2023-08-30 00:58:14,679 INFO L231 Difference]: Finished difference. Result has 241 places, 288 transitions, 2911 flow [2023-08-30 00:58:14,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2911, PETRI_PLACES=241, PETRI_TRANSITIONS=288} [2023-08-30 00:58:14,679 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 190 predicate places. [2023-08-30 00:58:14,679 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 288 transitions, 2911 flow [2023-08-30 00:58:14,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:14,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:58:14,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:58:14,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:58:14,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:58:14,890 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 00:58:14,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:58:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1474571303, now seen corresponding path program 4 times [2023-08-30 00:58:14,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:58:14,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623171698] [2023-08-30 00:58:14,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:58:14,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:58:14,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:58:14,892 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:58:14,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:58:15,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:58:15,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:58:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:58:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:58:15,115 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 88 treesize of output 84 [2023-08-30 00:58:15,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:58:15,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:58:15,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:58:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:58:16,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:58:16,756 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_806 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_806) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) c_~d~0) c_~W~0)) is different from false [2023-08-30 00:58:17,444 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 00:58:17,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 435 treesize of output 378 [2023-08-30 00:58:17,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 37 [2023-08-30 00:58:18,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:58:18,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 32 [2023-08-30 00:58:26,720 WARN L222 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 159 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:58:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:58:29,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:58:29,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623171698] [2023-08-30 00:58:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623171698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:58:29,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:58:29,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-08-30 00:58:29,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538841018] [2023-08-30 00:58:29,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:58:29,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:58:29,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:58:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:58:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=505, Unknown=3, NotChecked=46, Total=650 [2023-08-30 00:58:30,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 333 [2023-08-30 00:58:30,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 288 transitions, 2911 flow. Second operand has 26 states, 26 states have (on average 92.76923076923077) internal successors, (2412), 26 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:30,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:58:30,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 333 [2023-08-30 00:58:30,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:58:42,916 WARN L222 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 94 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:59:08,142 WARN L222 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 96 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:59:52,871 INFO L130 PetriNetUnfolder]: 78103/133899 cut-off events. [2023-08-30 00:59:52,872 INFO L131 PetriNetUnfolder]: For 887972/887972 co-relation queries the response was YES. [2023-08-30 00:59:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743037 conditions, 133899 events. 78103/133899 cut-off events. For 887972/887972 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 1169403 event pairs, 704 based on Foata normal form. 1672/135571 useless extension candidates. Maximal degree in co-relation 742936. Up to 29921 conditions per place. [2023-08-30 00:59:55,144 INFO L137 encePairwiseOnDemand]: 315/333 looper letters, 262 selfloop transitions, 344 changer transitions 58/664 dead transitions. [2023-08-30 00:59:55,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 664 transitions, 7827 flow [2023-08-30 00:59:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 00:59:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 00:59:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4981 transitions. [2023-08-30 00:59:55,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2932932932932933 [2023-08-30 00:59:55,152 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4981 transitions. [2023-08-30 00:59:55,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4981 transitions. [2023-08-30 00:59:55,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:59:55,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4981 transitions. [2023-08-30 00:59:55,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 97.66666666666667) internal successors, (4981), 51 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:55,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 333.0) internal successors, (17316), 52 states have internal predecessors, (17316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:55,172 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 333.0) internal successors, (17316), 52 states have internal predecessors, (17316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:55,172 INFO L175 Difference]: Start difference. First operand has 241 places, 288 transitions, 2911 flow. Second operand 51 states and 4981 transitions. [2023-08-30 00:59:55,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 664 transitions, 7827 flow [2023-08-30 01:03:45,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 664 transitions, 7017 flow, removed 247 selfloop flow, removed 12 redundant places. [2023-08-30 01:03:45,365 INFO L231 Difference]: Finished difference. Result has 295 places, 445 transitions, 5002 flow [2023-08-30 01:03:45,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5002, PETRI_PLACES=295, PETRI_TRANSITIONS=445} [2023-08-30 01:03:45,366 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 244 predicate places. [2023-08-30 01:03:45,366 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 445 transitions, 5002 flow [2023-08-30 01:03:45,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 92.76923076923077) internal successors, (2412), 26 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:45,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:45,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:03:45,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:45,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:45,578 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 01:03:45,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:45,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1859818804, now seen corresponding path program 5 times [2023-08-30 01:03:45,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:45,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192100362] [2023-08-30 01:03:45,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:03:45,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:45,580 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:45,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 01:03:45,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 01:03:45,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:03:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:03:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:03:45,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:03:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:03:46,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192100362] [2023-08-30 01:03:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192100362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:03:46,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:03:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 01:03:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060172870] [2023-08-30 01:03:46,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:03:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:03:46,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:03:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:03:46,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 01:03:46,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 445 transitions, 5002 flow. Second operand has 10 states, 10 states have (on average 139.4) internal successors, (1394), 10 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:46,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:46,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 01:03:46,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:10,622 INFO L130 PetriNetUnfolder]: 53232/96174 cut-off events. [2023-08-30 01:04:10,623 INFO L131 PetriNetUnfolder]: For 922510/928415 co-relation queries the response was YES. [2023-08-30 01:04:12,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651213 conditions, 96174 events. 53232/96174 cut-off events. For 922510/928415 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 880122 event pairs, 16114 based on Foata normal form. 2670/96233 useless extension candidates. Maximal degree in co-relation 651102. Up to 81917 conditions per place. [2023-08-30 01:04:12,768 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 481 selfloop transitions, 13 changer transitions 43/590 dead transitions. [2023-08-30 01:04:12,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 590 transitions, 7701 flow [2023-08-30 01:04:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 01:04:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 01:04:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1141 transitions. [2023-08-30 01:04:12,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283033033033033 [2023-08-30 01:04:12,771 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1141 transitions. [2023-08-30 01:04:12,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1141 transitions. [2023-08-30 01:04:12,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:12,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1141 transitions. [2023-08-30 01:04:12,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.625) internal successors, (1141), 8 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) [2023-08-30 01:04:12,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:12,774 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:12,774 INFO L175 Difference]: Start difference. First operand has 295 places, 445 transitions, 5002 flow. Second operand 8 states and 1141 transitions. [2023-08-30 01:04:12,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 590 transitions, 7701 flow Killed by 15