./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:41:38,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:41:38,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:41:38,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:41:38,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:41:38,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:41:38,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:41:38,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:41:38,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:41:38,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:41:38,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:41:38,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:41:38,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:41:38,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:41:38,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:41:38,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:41:38,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:41:38,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:41:38,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:41:38,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:41:38,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:41:38,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:41:38,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:41:38,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:41:38,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:41:38,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:41:38,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:41:38,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:41:38,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:41:38,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:41:38,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:41:38,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:41:38,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:41:38,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:41:38,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:41:38,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:41:38,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:41:38,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:41:38,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:41:38,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:41:38,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:41:38,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:41:38,420 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:41:38,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:41:38,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:41:38,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:41:38,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:41:38,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:41:38,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:41:38,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:41:38,423 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:41:38,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:41:38,424 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:41:38,424 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:41:38,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:41:38,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:41:38,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:41:38,425 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:41:38,425 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:41:38,425 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:41:38,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:41:38,425 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:41:38,426 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:41:38,426 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:41:38,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:41:38,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:41:38,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:41:38,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:38,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:41:38,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:41:38,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:41:38,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:41:38,427 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:41:38,428 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:41:38,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:41:38,428 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:41:38,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:41:38,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:41:38,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:41:38,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:41:38,720 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:41:38,721 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:41:38,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-30 05:41:40,007 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:41:40,180 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:41:40,181 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-30 05:41:40,187 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1031014f/b13bb16be8d64a14b219e5be41d0a76a/FLAG6b90eabb3 [2023-08-30 05:41:40,203 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1031014f/b13bb16be8d64a14b219e5be41d0a76a [2023-08-30 05:41:40,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:41:40,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:41:40,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:40,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:41:40,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:41:40,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:40" (1/1) ... [2023-08-30 05:41:40,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1e552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:40, skipping insertion in model container [2023-08-30 05:41:40,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:40" (1/1) ... [2023-08-30 05:41:40,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:41:40,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:40,427 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/parallel-min-max-1.wvr.c[3057,3070] [2023-08-30 05:41:40,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:40,454 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 05:41:40,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79e8492d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:40, skipping insertion in model container [2023-08-30 05:41:40,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:40,457 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:41:40,458 INFO L158 Benchmark]: Toolchain (without parser) took 251.11ms. Allocated memory is still 65.0MB. Free memory was 34.3MB in the beginning and 44.0MB in the end (delta: -9.7MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2023-08-30 05:41:40,459 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.5MB in the beginning and 28.5MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:41:40,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.79ms. Allocated memory is still 65.0MB. Free memory was 34.1MB in the beginning and 44.2MB in the end (delta: -10.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2023-08-30 05:41:40,461 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.5MB in the beginning and 28.5MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.79ms. Allocated memory is still 65.0MB. Free memory was 34.1MB in the beginning and 44.2MB in the end (delta: -10.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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/parallel-min-max-1.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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:41:42,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:41:42,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:41:42,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:41:42,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:41:42,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:41:42,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:41:42,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:41:42,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:41:42,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:41:42,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:41:42,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:41:42,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:41:42,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:41:42,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:41:42,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:41:42,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:41:42,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:41:42,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:41:42,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:41:42,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:41:42,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:41:42,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:41:42,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:41:42,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:41:42,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:41:42,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:41:42,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:41:42,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:41:42,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:41:42,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:41:42,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:41:42,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:41:42,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:41:42,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:41:42,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:41:42,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:41:42,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:41:42,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:41:42,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:41:42,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:41:42,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:41:42,269 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:41:42,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:41:42,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:41:42,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:41:42,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:41:42,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:41:42,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:41:42,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:41:42,273 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:41:42,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:41:42,274 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:41:42,274 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:41:42,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:41:42,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:41:42,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:41:42,275 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:41:42,275 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:41:42,275 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:41:42,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:41:42,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:41:42,276 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:41:42,276 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:41:42,276 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:41:42,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:41:42,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:41:42,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:41:42,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:41:42,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:42,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:41:42,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:41:42,278 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:41:42,278 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:41:42,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:41:42,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:41:42,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:41:42,279 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:41:42,279 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:41:42,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:41:42,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:41:42,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:41:42,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:41:42,594 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:41:42,595 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:41:42,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-30 05:41:43,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:41:43,943 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:41:43,944 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-30 05:41:43,951 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116893d1f/e62a0639bbd944e994f8a4ee262d3bdb/FLAGaf4d1f20c [2023-08-30 05:41:43,966 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116893d1f/e62a0639bbd944e994f8a4ee262d3bdb [2023-08-30 05:41:43,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:41:43,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:41:43,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:43,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:41:43,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:41:43,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:43" (1/1) ... [2023-08-30 05:41:43,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1dd43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:43, skipping insertion in model container [2023-08-30 05:41:43,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:43" (1/1) ... [2023-08-30 05:41:43,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:41:44,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:44,163 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/parallel-min-max-1.wvr.c[3057,3070] [2023-08-30 05:41:44,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:44,202 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:41:44,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:44,231 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/parallel-min-max-1.wvr.c[3057,3070] [2023-08-30 05:41:44,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:44,247 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:41:44,280 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/parallel-min-max-1.wvr.c[3057,3070] [2023-08-30 05:41:44,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:44,299 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:41:44,301 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:41:44,307 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:41:44,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44 WrapperNode [2023-08-30 05:41:44,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:44,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:41:44,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:41:44,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:41:44,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,364 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2023-08-30 05:41:44,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:41:44,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:41:44,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:41:44,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:41:44,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,414 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:41:44,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:41:44,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:41:44,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:41:44,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (1/1) ... [2023-08-30 05:41:44,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:41:44,454 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 05:41:44,480 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 05:41:44,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:41:44,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:41:44,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:41:44,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:41:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:41:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:41:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:41:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:41:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:41:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:41:44,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:41:44,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:41:44,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:41:44,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:41:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:41:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:41:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:41:44,553 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 05:41:44,715 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:41:44,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:41:45,183 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:41:45,261 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:41:45,261 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 05:41:45,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:41:45 BoogieIcfgContainer [2023-08-30 05:41:45,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:41:45,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:41:45,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:41:45,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:41:45,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:41:43" (1/3) ... [2023-08-30 05:41:45,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483a3432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:41:45, skipping insertion in model container [2023-08-30 05:41:45,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:44" (2/3) ... [2023-08-30 05:41:45,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483a3432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:41:45, skipping insertion in model container [2023-08-30 05:41:45,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:41:45" (3/3) ... [2023-08-30 05:41:45,270 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2023-08-30 05:41:45,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:41:45,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 05:41:45,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:41:45,356 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 05:41:45,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 197 transitions, 418 flow [2023-08-30 05:41:45,489 INFO L130 PetriNetUnfolder]: 12/194 cut-off events. [2023-08-30 05:41:45,489 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:41:45,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 12/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 225 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-08-30 05:41:45,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 197 transitions, 418 flow [2023-08-30 05:41:45,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 398 flow [2023-08-30 05:41:45,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:41:45,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 398 flow [2023-08-30 05:41:45,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 398 flow [2023-08-30 05:41:45,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 398 flow [2023-08-30 05:41:45,576 INFO L130 PetriNetUnfolder]: 12/190 cut-off events. [2023-08-30 05:41:45,576 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:41:45,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 190 events. 12/190 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 225 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-08-30 05:41:45,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2023-08-30 05:42:04,986 INFO L134 LiptonReduction]: Checked pairs total: 4273 [2023-08-30 05:42:04,986 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-08-30 05:42:04,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:42:05,001 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;@48497259, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:42:05,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-30 05:42:05,003 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:42:05,003 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:42:05,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:05,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:42:05,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:05,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 24836, now seen corresponding path program 1 times [2023-08-30 05:42:05,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:05,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047123818] [2023-08-30 05:42:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:05,017 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 05:42:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:05,019 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 05:42:05,023 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 05:42:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:42:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:05,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:05,348 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 05:42:05,400 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 05:42:05,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:05,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047123818] [2023-08-30 05:42:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047123818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:05,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:05,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:05,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535986525] [2023-08-30 05:42:05,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:05,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:05,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 397 [2023-08-30 05:42:05,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 05:42:05,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:05,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 397 [2023-08-30 05:42:05,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:06,334 INFO L130 PetriNetUnfolder]: 2075/3133 cut-off events. [2023-08-30 05:42:06,334 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 05:42:06,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 3133 events. 2075/3133 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14642 event pairs, 1762 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 2924. Up to 1561 conditions per place. [2023-08-30 05:42:06,356 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 83 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-30 05:42:06,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 384 flow [2023-08-30 05:42:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-30 05:42:06,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071368597816961 [2023-08-30 05:42:06,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-30 05:42:06,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-30 05:42:06,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:06,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-30 05:42:06,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 05:42:06,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:06,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:06,396 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 124 flow. Second operand 3 states and 604 transitions. [2023-08-30 05:42:06,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 384 flow [2023-08-30 05:42:06,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:42:06,407 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 116 flow [2023-08-30 05:42:06,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-30 05:42:06,415 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-08-30 05:42:06,416 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 116 flow [2023-08-30 05:42:06,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 05:42:06,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:06,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:42:06,433 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 05:42:06,626 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 05:42:06,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:06,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 24925, now seen corresponding path program 1 times [2023-08-30 05:42:06,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991587921] [2023-08-30 05:42:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:06,628 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 05:42:06,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:06,634 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 05:42:06,635 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 05:42:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:42:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:06,741 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 05:42:06,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:06,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:06,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991587921] [2023-08-30 05:42:06,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991587921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:06,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:06,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770806621] [2023-08-30 05:42:06,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:06,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:06,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:06,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:06,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 397 [2023-08-30 05:42:06,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 05:42:06,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:06,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 397 [2023-08-30 05:42:06,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:07,107 INFO L130 PetriNetUnfolder]: 1038/1570 cut-off events. [2023-08-30 05:42:07,107 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:42:07,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1570 events. 1038/1570 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6407 event pairs, 881 based on Foata normal form. 0/836 useless extension candidates. Maximal degree in co-relation 3172. Up to 1561 conditions per place. [2023-08-30 05:42:07,116 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-30 05:42:07,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 210 flow [2023-08-30 05:42:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 05:42:07,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019311502938704 [2023-08-30 05:42:07,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 05:42:07,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 05:42:07,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:07,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 05:42:07,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 05:42:07,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:07,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:07,124 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 116 flow. Second operand 3 states and 560 transitions. [2023-08-30 05:42:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 210 flow [2023-08-30 05:42:07,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:07,127 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 128 flow [2023-08-30 05:42:07,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-30 05:42:07,128 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-30 05:42:07,128 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 128 flow [2023-08-30 05:42:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 05:42:07,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:07,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:42:07,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 05:42:07,340 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 05:42:07,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:07,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash 24837, now seen corresponding path program 1 times [2023-08-30 05:42:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:07,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47009691] [2023-08-30 05:42:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:07,341 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 05:42:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:07,347 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 05:42:07,349 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 05:42:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:42:07,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:07,477 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:42:07,478 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 05:42:07,491 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 05:42:07,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:07,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47009691] [2023-08-30 05:42:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47009691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261267532] [2023-08-30 05:42:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 397 [2023-08-30 05:42:07,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 05:42:07,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:07,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 397 [2023-08-30 05:42:07,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:07,854 INFO L130 PetriNetUnfolder]: 1038/1567 cut-off events. [2023-08-30 05:42:07,854 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:42:07,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1567 events. 1038/1567 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6401 event pairs, 881 based on Foata normal form. 2/837 useless extension candidates. Maximal degree in co-relation 3171. Up to 1559 conditions per place. [2023-08-30 05:42:07,861 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 42 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 05:42:07,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 208 flow [2023-08-30 05:42:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-30 05:42:07,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45759865659109994 [2023-08-30 05:42:07,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-30 05:42:07,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-30 05:42:07,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:07,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-30 05:42:07,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 05:42:07,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:07,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:07,868 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 128 flow. Second operand 3 states and 545 transitions. [2023-08-30 05:42:07,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 208 flow [2023-08-30 05:42:07,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 202 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 05:42:07,870 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 118 flow [2023-08-30 05:42:07,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-30 05:42:07,871 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-08-30 05:42:07,871 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 118 flow [2023-08-30 05:42:07,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 05:42:07,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:07,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:42:07,881 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 05:42:08,080 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 05:42:08,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:08,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash 772624, now seen corresponding path program 1 times [2023-08-30 05:42:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803294861] [2023-08-30 05:42:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:08,082 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 05:42:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:08,086 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 05:42:08,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 05:42:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:42:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:08,175 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 05:42:08,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:08,217 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 25 treesize of output 21 [2023-08-30 05:42:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:08,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803294861] [2023-08-30 05:42:08,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803294861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:08,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:08,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:42:08,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826295209] [2023-08-30 05:42:08,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:08,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:08,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:08,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:08,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 397 [2023-08-30 05:42:08,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states 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 05:42:08,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:08,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 397 [2023-08-30 05:42:08,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:09,375 INFO L130 PetriNetUnfolder]: 2075/3130 cut-off events. [2023-08-30 05:42:09,375 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:42:09,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6348 conditions, 3130 events. 2075/3130 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14717 event pairs, 1762 based on Foata normal form. 0/1668 useless extension candidates. Maximal degree in co-relation 6339. Up to 1557 conditions per place. [2023-08-30 05:42:09,390 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 79 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-30 05:42:09,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 374 flow [2023-08-30 05:42:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 909 transitions. [2023-08-30 05:42:09,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579345088161209 [2023-08-30 05:42:09,393 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 909 transitions. [2023-08-30 05:42:09,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 909 transitions. [2023-08-30 05:42:09,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:09,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 909 transitions. [2023-08-30 05:42:09,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.8) internal successors, (909), 5 states have internal predecessors, (909), 0 states have call successors, (0), 0 states 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 05:42:09,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:09,400 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:09,400 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 5 states and 909 transitions. [2023-08-30 05:42:09,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 374 flow [2023-08-30 05:42:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:09,403 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 127 flow [2023-08-30 05:42:09,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-30 05:42:09,405 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-30 05:42:09,405 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 127 flow [2023-08-30 05:42:09,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states 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 05:42:09,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:09,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:42:09,420 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 05:42:09,615 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 05:42:09,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:09,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 772556, now seen corresponding path program 1 times [2023-08-30 05:42:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:09,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598036158] [2023-08-30 05:42:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:09,617 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 05:42:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:09,618 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 05:42:09,621 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 05:42:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:42:09,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:09,776 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:09,777 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 05:42:09,832 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 05:42:09,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:10,013 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 05:42:10,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598036158] [2023-08-30 05:42:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598036158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:10,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:10,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:42:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473670638] [2023-08-30 05:42:10,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:10,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:10,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-08-30 05:42:10,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 05:42:10,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:10,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-08-30 05:42:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:11,472 INFO L130 PetriNetUnfolder]: 2081/3137 cut-off events. [2023-08-30 05:42:11,472 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:42:11,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6377 conditions, 3137 events. 2081/3137 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14600 event pairs, 1762 based on Foata normal form. 3/1676 useless extension candidates. Maximal degree in co-relation 6366. Up to 1561 conditions per place. [2023-08-30 05:42:11,492 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 78 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2023-08-30 05:42:11,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 429 flow [2023-08-30 05:42:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:42:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:42:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1064 transitions. [2023-08-30 05:42:11,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466834592779177 [2023-08-30 05:42:11,496 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1064 transitions. [2023-08-30 05:42:11,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1064 transitions. [2023-08-30 05:42:11,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:11,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1064 transitions. [2023-08-30 05:42:11,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 05:42:11,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 397.0) internal successors, (2779), 7 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states 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 05:42:11,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 397.0) internal successors, (2779), 7 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states 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 05:42:11,504 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 127 flow. Second operand 6 states and 1064 transitions. [2023-08-30 05:42:11,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 429 flow [2023-08-30 05:42:11,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 05:42:11,509 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 220 flow [2023-08-30 05:42:11,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-30 05:42:11,511 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-30 05:42:11,511 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 220 flow [2023-08-30 05:42:11,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 05:42:11,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:11,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:42:11,521 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 05:42:11,720 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 05:42:11,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:11,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash 772645, now seen corresponding path program 1 times [2023-08-30 05:42:11,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:11,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408256947] [2023-08-30 05:42:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:11,722 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 05:42:11,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:11,723 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 05:42:11,725 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 05:42:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:42:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:11,880 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-08-30 05:42:11,881 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 05:42:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:11,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:11,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:11,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408256947] [2023-08-30 05:42:11,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408256947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:11,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:11,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586758152] [2023-08-30 05:42:11,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:11,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:11,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:11,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:12,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 397 [2023-08-30 05:42:12,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 05:42:12,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:12,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 397 [2023-08-30 05:42:12,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:12,374 INFO L130 PetriNetUnfolder]: 1719/2629 cut-off events. [2023-08-30 05:42:12,374 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 05:42:12,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5387 conditions, 2629 events. 1719/2629 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12126 event pairs, 1450 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 5372. Up to 2613 conditions per place. [2023-08-30 05:42:12,387 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 46 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 05:42:12,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 288 flow [2023-08-30 05:42:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-30 05:42:12,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550797649034425 [2023-08-30 05:42:12,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-30 05:42:12,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-30 05:42:12,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:12,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-30 05:42:12,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 05:42:12,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:12,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:12,395 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 220 flow. Second operand 3 states and 542 transitions. [2023-08-30 05:42:12,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 288 flow [2023-08-30 05:42:12,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 262 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:12,399 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 170 flow [2023-08-30 05:42:12,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-08-30 05:42:12,401 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-30 05:42:12,401 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 170 flow [2023-08-30 05:42:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 05:42:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:42:12,418 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 05:42:12,618 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 05:42:12,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:12,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash 772647, now seen corresponding path program 1 times [2023-08-30 05:42:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847087894] [2023-08-30 05:42:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:12,619 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 05:42:12,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:12,620 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 05:42:12,621 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 05:42:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:42:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:12,825 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 05:42:12,825 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 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 05:42:12,847 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 05:42:12,847 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 05:42:13,105 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 05:42:13,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:13,250 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 05:42:13,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847087894] [2023-08-30 05:42:13,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847087894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:13,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:13,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:42:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430667382] [2023-08-30 05:42:13,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:13,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:13,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-08-30 05:42:13,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:13,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:13,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-08-30 05:42:13,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:14,770 INFO L130 PetriNetUnfolder]: 1537/2374 cut-off events. [2023-08-30 05:42:14,770 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 05:42:14,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 2374 events. 1537/2374 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10800 event pairs, 1294 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 4842. Up to 1303 conditions per place. [2023-08-30 05:42:14,781 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 70 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-30 05:42:14,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 394 flow [2023-08-30 05:42:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:42:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:42:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1189 transitions. [2023-08-30 05:42:14,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278517452320979 [2023-08-30 05:42:14,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1189 transitions. [2023-08-30 05:42:14,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1189 transitions. [2023-08-30 05:42:14,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:14,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1189 transitions. [2023-08-30 05:42:14,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 05:42:14,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 397.0) internal successors, (3176), 8 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states 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 05:42:14,794 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 397.0) internal successors, (3176), 8 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states 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 05:42:14,794 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 170 flow. Second operand 7 states and 1189 transitions. [2023-08-30 05:42:14,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 394 flow [2023-08-30 05:42:14,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:14,797 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 177 flow [2023-08-30 05:42:14,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=177, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-30 05:42:14,798 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2023-08-30 05:42:14,798 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 177 flow [2023-08-30 05:42:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:14,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:14,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:42:14,811 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 05:42:15,011 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 05:42:15,012 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:15,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash 742530172, now seen corresponding path program 1 times [2023-08-30 05:42:15,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:15,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114970913] [2023-08-30 05:42:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:15,014 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 05:42:15,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:15,015 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 05:42:15,020 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 05:42:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 05:42:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:15,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:15,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114970913] [2023-08-30 05:42:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114970913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:15,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:15,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:42:15,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050658562] [2023-08-30 05:42:15,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:15,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:15,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:15,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:15,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:15,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-08-30 05:42:15,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 05:42:15,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:15,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-08-30 05:42:15,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:15,482 INFO L130 PetriNetUnfolder]: 1098/1705 cut-off events. [2023-08-30 05:42:15,483 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-30 05:42:15,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1705 events. 1098/1705 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7206 event pairs, 891 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 3547. Up to 1690 conditions per place. [2023-08-30 05:42:15,490 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 39 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-30 05:42:15,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 255 flow [2023-08-30 05:42:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-30 05:42:15,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450041981528128 [2023-08-30 05:42:15,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-30 05:42:15,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-30 05:42:15,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:15,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-30 05:42:15,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 05:42:15,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:15,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:15,496 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 177 flow. Second operand 3 states and 530 transitions. [2023-08-30 05:42:15,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 255 flow [2023-08-30 05:42:15,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 229 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 05:42:15,498 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 151 flow [2023-08-30 05:42:15,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-30 05:42:15,500 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-30 05:42:15,500 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 151 flow [2023-08-30 05:42:15,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 05:42:15,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:15,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:42:15,510 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 05:42:15,710 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 05:42:15,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:15,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash 742530173, now seen corresponding path program 1 times [2023-08-30 05:42:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628930340] [2023-08-30 05:42:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:15,711 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 05:42:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:15,712 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 05:42:15,714 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 05:42:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:42:15,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:15,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:15,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628930340] [2023-08-30 05:42:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628930340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:15,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:15,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:42:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75503836] [2023-08-30 05:42:15,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:15,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:15,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:16,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-08-30 05:42:16,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 05:42:16,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:16,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-08-30 05:42:16,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:16,269 INFO L130 PetriNetUnfolder]: 1098/1697 cut-off events. [2023-08-30 05:42:16,269 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 05:42:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1697 events. 1098/1697 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7125 event pairs, 891 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 3532. Up to 1690 conditions per place. [2023-08-30 05:42:16,275 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-30 05:42:16,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 233 flow [2023-08-30 05:42:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-30 05:42:16,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44584382871536526 [2023-08-30 05:42:16,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-30 05:42:16,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-30 05:42:16,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:16,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-30 05:42:16,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 05:42:16,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:16,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:16,282 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 151 flow. Second operand 3 states and 531 transitions. [2023-08-30 05:42:16,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 233 flow [2023-08-30 05:42:16,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:16,284 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 151 flow [2023-08-30 05:42:16,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-30 05:42:16,284 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-08-30 05:42:16,285 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 151 flow [2023-08-30 05:42:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 05:42:16,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:16,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:42:16,299 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 05:42:16,494 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 05:42:16,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:16,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 742530365, now seen corresponding path program 1 times [2023-08-30 05:42:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:16,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995134674] [2023-08-30 05:42:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:16,496 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 05:42:16,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:16,496 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 05:42:16,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 05:42:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:16,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:42:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:16,631 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-30 05:42:16,631 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 05:42:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:16,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:16,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:16,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995134674] [2023-08-30 05:42:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995134674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:16,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952321831] [2023-08-30 05:42:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:16,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:16,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-08-30 05:42:16,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 05:42:16,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:16,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-08-30 05:42:16,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:16,943 INFO L130 PetriNetUnfolder]: 1058/1627 cut-off events. [2023-08-30 05:42:16,943 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 05:42:16,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3412 conditions, 1627 events. 1058/1627 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6760 event pairs, 857 based on Foata normal form. 0/1092 useless extension candidates. Maximal degree in co-relation 3397. Up to 1627 conditions per place. [2023-08-30 05:42:16,948 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 05:42:16,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 41 transitions, 229 flow [2023-08-30 05:42:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-08-30 05:42:16,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441645675902603 [2023-08-30 05:42:16,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-08-30 05:42:16,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-08-30 05:42:16,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:16,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-08-30 05:42:16,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 05:42:16,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:16,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:16,960 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 151 flow. Second operand 3 states and 529 transitions. [2023-08-30 05:42:16,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 41 transitions, 229 flow [2023-08-30 05:42:16,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:16,963 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 145 flow [2023-08-30 05:42:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-08-30 05:42:16,965 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-30 05:42:16,965 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 145 flow [2023-08-30 05:42:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 05:42:16,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:16,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:42:16,977 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 05:42:17,174 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 05:42:17,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:17,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 742530366, now seen corresponding path program 1 times [2023-08-30 05:42:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:17,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064245703] [2023-08-30 05:42:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:17,175 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 05:42:17,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:17,177 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 05:42:17,179 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 05:42:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:42:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:17,335 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 05:42:17,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 05:42:17,345 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 05:42:17,538 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 05:42:17,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:17,729 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 05:42:17,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064245703] [2023-08-30 05:42:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064245703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:17,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:17,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:17,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145108490] [2023-08-30 05:42:17,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:17,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:17,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:18,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-08-30 05:42:18,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 05:42:18,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:18,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-08-30 05:42:18,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:18,980 INFO L130 PetriNetUnfolder]: 1018/1557 cut-off events. [2023-08-30 05:42:18,980 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 05:42:18,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3273 conditions, 1557 events. 1018/1557 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6330 event pairs, 823 based on Foata normal form. 0/1064 useless extension candidates. Maximal degree in co-relation 3257. Up to 869 conditions per place. [2023-08-30 05:42:18,985 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-30 05:42:18,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 345 flow [2023-08-30 05:42:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2023-08-30 05:42:18,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317380352644836 [2023-08-30 05:42:18,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2023-08-30 05:42:18,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2023-08-30 05:42:18,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:18,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2023-08-30 05:42:18,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states 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 05:42:18,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:18,994 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:18,994 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 145 flow. Second operand 5 states and 857 transitions. [2023-08-30 05:42:18,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 345 flow [2023-08-30 05:42:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:18,996 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 146 flow [2023-08-30 05:42:18,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-08-30 05:42:18,997 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-08-30 05:42:18,997 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 146 flow [2023-08-30 05:42:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 05:42:18,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:18,998 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:42:19,011 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 05:42:19,207 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 05:42:19,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:19,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1543000927, now seen corresponding path program 2 times [2023-08-30 05:42:19,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:19,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108925562] [2023-08-30 05:42:19,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:42:19,209 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 05:42:19,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:19,212 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 05:42:19,215 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 05:42:19,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:42:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:19,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:42:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:19,377 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 05:42:19,378 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 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 05:42:19,390 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 05:42:19,392 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 05:42:19,489 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 05:42:19,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:19,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:19,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108925562] [2023-08-30 05:42:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108925562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:19,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:19,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408775327] [2023-08-30 05:42:19,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:19,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:19,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 397 [2023-08-30 05:42:19,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 05:42:19,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:19,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 397 [2023-08-30 05:42:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:19,824 INFO L130 PetriNetUnfolder]: 893/1381 cut-off events. [2023-08-30 05:42:19,824 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 05:42:19,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 1381 events. 893/1381 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5595 event pairs, 718 based on Foata normal form. 50/979 useless extension candidates. Maximal degree in co-relation 2853. Up to 1381 conditions per place. [2023-08-30 05:42:19,829 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 05:42:19,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 37 transitions, 208 flow [2023-08-30 05:42:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-30 05:42:19,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508816120906801 [2023-08-30 05:42:19,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-30 05:42:19,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-30 05:42:19,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:19,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-30 05:42:19,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 05:42:19,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:19,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:19,837 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 146 flow. Second operand 3 states and 537 transitions. [2023-08-30 05:42:19,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 37 transitions, 208 flow [2023-08-30 05:42:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:42:19,838 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 129 flow [2023-08-30 05:42:19,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-30 05:42:19,839 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-08-30 05:42:19,839 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 129 flow [2023-08-30 05:42:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 05:42:19,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:19,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:42:19,849 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 05:42:20,048 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 05:42:20,049 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:20,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1543000836, now seen corresponding path program 2 times [2023-08-30 05:42:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:20,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207315465] [2023-08-30 05:42:20,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:42:20,051 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 05:42:20,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:20,052 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 05:42:20,055 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 05:42:20,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:42:20,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:42:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:20,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:20,246 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 05:42:20,370 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 05:42:20,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:20,834 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 05:42:20,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207315465] [2023-08-30 05:42:20,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207315465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:20,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:20,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:42:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097772032] [2023-08-30 05:42:20,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:42:20,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:42:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:42:23,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-08-30 05:42:23,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 129 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states 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 05:42:23,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:23,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-08-30 05:42:23,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:26,906 INFO L130 PetriNetUnfolder]: 3563/5503 cut-off events. [2023-08-30 05:42:26,906 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 05:42:26,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11333 conditions, 5503 events. 3563/5503 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 28317 event pairs, 2872 based on Foata normal form. 6/3701 useless extension candidates. Maximal degree in co-relation 11317. Up to 704 conditions per place. [2023-08-30 05:42:26,927 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 226 selfloop transitions, 13 changer transitions 0/239 dead transitions. [2023-08-30 05:42:26,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 239 transitions, 1121 flow [2023-08-30 05:42:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:42:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:42:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2201 transitions. [2023-08-30 05:42:26,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620067170445004 [2023-08-30 05:42:26,935 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2201 transitions. [2023-08-30 05:42:26,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2201 transitions. [2023-08-30 05:42:26,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:26,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2201 transitions. [2023-08-30 05:42:26,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.41666666666666) internal successors, (2201), 12 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states 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 05:42:26,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 397.0) internal successors, (5161), 13 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states 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 05:42:26,959 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 397.0) internal successors, (5161), 13 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states 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 05:42:26,959 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 129 flow. Second operand 12 states and 2201 transitions. [2023-08-30 05:42:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 239 transitions, 1121 flow [2023-08-30 05:42:26,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 239 transitions, 1120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:26,964 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 242 flow [2023-08-30 05:42:26,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=242, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-30 05:42:26,965 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2023-08-30 05:42:26,965 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 242 flow [2023-08-30 05:42:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states 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 05:42:26,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:26,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:26,983 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 05:42:27,177 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 05:42:27,177 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:27,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 606944818, now seen corresponding path program 1 times [2023-08-30 05:42:27,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:27,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404115932] [2023-08-30 05:42:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:27,180 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 05:42:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:27,181 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 05:42:27,184 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 05:42:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:42:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:27,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:27,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404115932] [2023-08-30 05:42:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404115932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:27,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:27,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:42:27,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520366160] [2023-08-30 05:42:27,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-08-30 05:42:27,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 05:42:27,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:27,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-08-30 05:42:27,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:28,266 INFO L130 PetriNetUnfolder]: 5147/7999 cut-off events. [2023-08-30 05:42:28,266 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 05:42:28,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16466 conditions, 7999 events. 5147/7999 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 45994 event pairs, 2872 based on Foata normal form. 0/5343 useless extension candidates. Maximal degree in co-relation 16442. Up to 5490 conditions per place. [2023-08-30 05:42:28,320 INFO L137 encePairwiseOnDemand]: 392/397 looper letters, 60 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-08-30 05:42:28,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 429 flow [2023-08-30 05:42:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 865 transitions. [2023-08-30 05:42:28,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357682619647355 [2023-08-30 05:42:28,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 865 transitions. [2023-08-30 05:42:28,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 865 transitions. [2023-08-30 05:42:28,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:28,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 865 transitions. [2023-08-30 05:42:28,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states 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 05:42:28,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:28,328 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:28,329 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 242 flow. Second operand 5 states and 865 transitions. [2023-08-30 05:42:28,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 429 flow [2023-08-30 05:42:28,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 399 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 05:42:28,331 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 236 flow [2023-08-30 05:42:28,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-08-30 05:42:28,332 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2023-08-30 05:42:28,332 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 236 flow [2023-08-30 05:42:28,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 05:42:28,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:28,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:28,341 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 05:42:28,541 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 05:42:28,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:28,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash 607129059, now seen corresponding path program 1 times [2023-08-30 05:42:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134248473] [2023-08-30 05:42:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:42:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:28,543 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 05:42:28,554 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 05:42:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:28,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 05:42:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:28,739 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 05:42:28,739 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 46 [2023-08-30 05:42:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:28,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:28,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:28,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134248473] [2023-08-30 05:42:28,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134248473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:28,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:28,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:28,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895810805] [2023-08-30 05:42:28,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:28,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:28,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-08-30 05:42:28,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 05:42:28,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:28,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-08-30 05:42:28,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:29,471 INFO L130 PetriNetUnfolder]: 4571/7111 cut-off events. [2023-08-30 05:42:29,471 INFO L131 PetriNetUnfolder]: For 1588/1588 co-relation queries the response was YES. [2023-08-30 05:42:29,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16162 conditions, 7111 events. 4571/7111 cut-off events. For 1588/1588 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 39014 event pairs, 3816 based on Foata normal form. 0/5591 useless extension candidates. Maximal degree in co-relation 16136. Up to 7111 conditions per place. [2023-08-30 05:42:29,494 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 05:42:29,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 44 transitions, 320 flow [2023-08-30 05:42:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-30 05:42:29,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43912678421494544 [2023-08-30 05:42:29,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-30 05:42:29,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-30 05:42:29,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:29,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-30 05:42:29,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 05:42:29,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:29,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 05:42:29,501 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 236 flow. Second operand 3 states and 523 transitions. [2023-08-30 05:42:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 44 transitions, 320 flow [2023-08-30 05:42:29,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 44 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:29,504 INFO L231 Difference]: Finished difference. Result has 66 places, 44 transitions, 220 flow [2023-08-30 05:42:29,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=44} [2023-08-30 05:42:29,505 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2023-08-30 05:42:29,505 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 44 transitions, 220 flow [2023-08-30 05:42:29,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 05:42:29,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:29,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:29,523 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 05:42:29,715 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 05:42:29,715 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:29,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash 607129060, now seen corresponding path program 1 times [2023-08-30 05:42:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:29,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849835452] [2023-08-30 05:42:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:29,716 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 05:42:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:29,717 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 05:42:29,719 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 05:42:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:29,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:42:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:29,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:29,911 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 05:42:30,060 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 05:42:30,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:30,229 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 05:42:30,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:30,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849835452] [2023-08-30 05:42:30,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849835452] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:30,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:30,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820161787] [2023-08-30 05:42:30,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:30,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:30,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-08-30 05:42:30,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 44 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 05:42:30,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:30,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-08-30 05:42:30,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:31,407 INFO L130 PetriNetUnfolder]: 3995/6223 cut-off events. [2023-08-30 05:42:31,407 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2023-08-30 05:42:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13920 conditions, 6223 events. 3995/6223 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 33305 event pairs, 3336 based on Foata normal form. 0/5167 useless extension candidates. Maximal degree in co-relation 13894. Up to 5445 conditions per place. [2023-08-30 05:42:31,425 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-30 05:42:31,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 422 flow [2023-08-30 05:42:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 847 transitions. [2023-08-30 05:42:31,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42670025188916877 [2023-08-30 05:42:31,427 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 847 transitions. [2023-08-30 05:42:31,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 847 transitions. [2023-08-30 05:42:31,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:31,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 847 transitions. [2023-08-30 05:42:31,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:31,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:31,432 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:31,432 INFO L175 Difference]: Start difference. First operand has 66 places, 44 transitions, 220 flow. Second operand 5 states and 847 transitions. [2023-08-30 05:42:31,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 422 flow [2023-08-30 05:42:31,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:31,435 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 221 flow [2023-08-30 05:42:31,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-08-30 05:42:31,436 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-08-30 05:42:31,436 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 221 flow [2023-08-30 05:42:31,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 05:42:31,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:31,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:31,449 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 05:42:31,646 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 05:42:31,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:31,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1635424995, now seen corresponding path program 1 times [2023-08-30 05:42:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:31,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463052249] [2023-08-30 05:42:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:31,648 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 05:42:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:31,649 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 05:42:31,651 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 05:42:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:31,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:42:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:31,915 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:31,916 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 05:42:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:32,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:32,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:32,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463052249] [2023-08-30 05:42:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463052249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:32,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:42:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739462665] [2023-08-30 05:42:32,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:32,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:42:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:42:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:42:34,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 397 [2023-08-30 05:42:34,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 221 flow. Second operand has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states 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 05:42:34,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:34,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 397 [2023-08-30 05:42:34,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:36,062 INFO L130 PetriNetUnfolder]: 5995/8991 cut-off events. [2023-08-30 05:42:36,062 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-30 05:42:36,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 8991 events. 5995/8991 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 50842 event pairs, 1544 based on Foata normal form. 256/7903 useless extension candidates. Maximal degree in co-relation 20344. Up to 3026 conditions per place. [2023-08-30 05:42:36,087 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 85 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-08-30 05:42:36,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 546 flow [2023-08-30 05:42:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:42:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:42:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-30 05:42:36,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317380352644834 [2023-08-30 05:42:36,092 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-30 05:42:36,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-30 05:42:36,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:36,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-30 05:42:36,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 05:42:36,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states 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 05:42:36,100 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states 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 05:42:36,100 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 221 flow. Second operand 8 states and 1344 transitions. [2023-08-30 05:42:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 546 flow [2023-08-30 05:42:36,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 539 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:36,106 INFO L231 Difference]: Finished difference. Result has 76 places, 47 transitions, 289 flow [2023-08-30 05:42:36,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=76, PETRI_TRANSITIONS=47} [2023-08-30 05:42:36,107 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2023-08-30 05:42:36,107 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 47 transitions, 289 flow [2023-08-30 05:42:36,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states 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 05:42:36,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:36,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:36,118 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 05:42:36,317 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 05:42:36,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:36,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -664683545, now seen corresponding path program 1 times [2023-08-30 05:42:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:36,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189407747] [2023-08-30 05:42:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:42:36,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:36,319 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 05:42:36,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 05:42:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:42:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:36,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:36,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:36,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189407747] [2023-08-30 05:42:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189407747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:36,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:42:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380300023] [2023-08-30 05:42:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:36,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-08-30 05:42:36,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 47 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 05:42:36,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:36,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-08-30 05:42:36,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:37,765 INFO L130 PetriNetUnfolder]: 8331/12511 cut-off events. [2023-08-30 05:42:37,765 INFO L131 PetriNetUnfolder]: For 16824/16824 co-relation queries the response was YES. [2023-08-30 05:42:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36353 conditions, 12511 events. 8331/12511 cut-off events. For 16824/16824 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 72447 event pairs, 4680 based on Foata normal form. 0/10879 useless extension candidates. Maximal degree in co-relation 36321. Up to 8978 conditions per place. [2023-08-30 05:42:37,813 INFO L137 encePairwiseOnDemand]: 392/397 looper letters, 62 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-30 05:42:37,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 533 flow [2023-08-30 05:42:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-08-30 05:42:37,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073047858942065 [2023-08-30 05:42:37,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-08-30 05:42:37,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-08-30 05:42:37,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:37,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-08-30 05:42:37,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 05:42:37,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:37,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:42:37,820 INFO L175 Difference]: Start difference. First operand has 76 places, 47 transitions, 289 flow. Second operand 5 states and 855 transitions. [2023-08-30 05:42:37,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 533 flow [2023-08-30 05:42:37,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 506 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:37,835 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 296 flow [2023-08-30 05:42:37,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=78, PETRI_TRANSITIONS=48} [2023-08-30 05:42:37,836 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2023-08-30 05:42:37,836 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 296 flow [2023-08-30 05:42:37,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 05:42:37,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:37,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:37,847 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 05:42:38,045 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 05:42:38,046 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:38,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 869650084, now seen corresponding path program 1 times [2023-08-30 05:42:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147276460] [2023-08-30 05:42:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:38,047 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 05:42:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:38,047 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 05:42:38,051 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 05:42:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:38,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:42:38,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:38,224 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:38,224 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 05:42:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:38,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:38,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147276460] [2023-08-30 05:42:38,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147276460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:38,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:38,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:42:38,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713779208] [2023-08-30 05:42:38,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:38,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:42:38,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:42:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:42:40,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 397 [2023-08-30 05:42:40,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 48 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 05:42:40,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:40,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 397 [2023-08-30 05:42:40,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:43,123 INFO L130 PetriNetUnfolder]: 12875/18687 cut-off events. [2023-08-30 05:42:43,123 INFO L131 PetriNetUnfolder]: For 22632/22632 co-relation queries the response was YES. [2023-08-30 05:42:43,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55148 conditions, 18687 events. 12875/18687 cut-off events. For 22632/22632 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 107053 event pairs, 3640 based on Foata normal form. 544/18687 useless extension candidates. Maximal degree in co-relation 55115. Up to 7154 conditions per place. [2023-08-30 05:42:43,212 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 113 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2023-08-30 05:42:43,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 126 transitions, 896 flow [2023-08-30 05:42:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:42:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:42:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1342 transitions. [2023-08-30 05:42:43,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422544080604534 [2023-08-30 05:42:43,217 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1342 transitions. [2023-08-30 05:42:43,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1342 transitions. [2023-08-30 05:42:43,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:43,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1342 transitions. [2023-08-30 05:42:43,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.75) internal successors, (1342), 8 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 05:42:43,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states 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 05:42:43,229 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states 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 05:42:43,231 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 296 flow. Second operand 8 states and 1342 transitions. [2023-08-30 05:42:43,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 126 transitions, 896 flow [2023-08-30 05:42:43,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 126 transitions, 880 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:43,264 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 355 flow [2023-08-30 05:42:43,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=355, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2023-08-30 05:42:43,265 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2023-08-30 05:42:43,265 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 355 flow [2023-08-30 05:42:43,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 05:42:43,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:43,267 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:43,279 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 05:42:43,479 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 05:42:43,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:42:43,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:43,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1158192526, now seen corresponding path program 2 times [2023-08-30 05:42:43,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:43,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804922218] [2023-08-30 05:42:43,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:42:43,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:42:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:43,482 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 05:42:43,483 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 05:42:43,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:42:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:42:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:43,674 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:43,675 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 05:42:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:43,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:44,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804922218] [2023-08-30 05:42:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804922218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:44,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:44,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 05:42:44,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606197397] [2023-08-30 05:42:44,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:44,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 05:42:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 05:42:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 05:42:53,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 397 [2023-08-30 05:42:53,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 355 flow. Second operand has 18 states, 18 states have (on average 155.22222222222223) internal successors, (2794), 18 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states 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 05:42:53,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:53,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 397 [2023-08-30 05:42:53,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:02,015 INFO L130 PetriNetUnfolder]: 12915/18945 cut-off events. [2023-08-30 05:43:02,015 INFO L131 PetriNetUnfolder]: For 39711/39711 co-relation queries the response was YES. [2023-08-30 05:43:02,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67568 conditions, 18945 events. 12915/18945 cut-off events. For 39711/39711 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 111392 event pairs, 5312 based on Foata normal form. 186/19131 useless extension candidates. Maximal degree in co-relation 67530. Up to 7861 conditions per place. [2023-08-30 05:43:02,099 INFO L137 encePairwiseOnDemand]: 389/397 looper letters, 301 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2023-08-30 05:43:02,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 325 transitions, 2379 flow [2023-08-30 05:43:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 05:43:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 05:43:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3155 transitions. [2023-08-30 05:43:02,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41826859339785233 [2023-08-30 05:43:02,106 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3155 transitions. [2023-08-30 05:43:02,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3155 transitions. [2023-08-30 05:43:02,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:02,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3155 transitions. [2023-08-30 05:43:02,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 166.05263157894737) internal successors, (3155), 19 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 05:43:02,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states 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 05:43:02,119 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states 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 05:43:02,119 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 355 flow. Second operand 19 states and 3155 transitions. [2023-08-30 05:43:02,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 325 transitions, 2379 flow [2023-08-30 05:43:02,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 325 transitions, 2231 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-08-30 05:43:02,205 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 521 flow [2023-08-30 05:43:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=521, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2023-08-30 05:43:02,206 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 47 predicate places. [2023-08-30 05:43:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 521 flow [2023-08-30 05:43:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 155.22222222222223) internal successors, (2794), 18 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states 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 05:43:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:02,207 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 05:43:02,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 05:43:02,416 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 05:43:02,416 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:43:02,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 703290884, now seen corresponding path program 3 times [2023-08-30 05:43:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:02,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792380247] [2023-08-30 05:43:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:43:02,417 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 05:43:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:02,418 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 05:43:02,419 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 05:43:02,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:43:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:43:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:43:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:02,649 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:43:02,649 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 05:43:02,915 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 05:43:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:43:04,821 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 05:43:04,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792380247] [2023-08-30 05:43:04,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792380247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:43:04,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:43:04,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 05:43:04,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764669677] [2023-08-30 05:43:04,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:43:04,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 05:43:04,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 05:43:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:43:17,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-08-30 05:43:17,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 521 flow. Second operand has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states 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 05:43:17,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:17,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-08-30 05:43:17,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:37,079 INFO L130 PetriNetUnfolder]: 32223/46965 cut-off events. [2023-08-30 05:43:37,079 INFO L131 PetriNetUnfolder]: For 132949/132949 co-relation queries the response was YES. [2023-08-30 05:43:37,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176565 conditions, 46965 events. 32223/46965 cut-off events. For 132949/132949 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 285843 event pairs, 24676 based on Foata normal form. 12/46977 useless extension candidates. Maximal degree in co-relation 176522. Up to 6891 conditions per place. [2023-08-30 05:43:37,486 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 721 selfloop transitions, 25 changer transitions 0/746 dead transitions. [2023-08-30 05:43:37,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 746 transitions, 5743 flow [2023-08-30 05:43:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 05:43:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 05:43:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4430 transitions. [2023-08-30 05:43:37,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649454240134341 [2023-08-30 05:43:37,493 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4430 transitions. [2023-08-30 05:43:37,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4430 transitions. [2023-08-30 05:43:37,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:37,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4430 transitions. [2023-08-30 05:43:37,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 184.58333333333334) internal successors, (4430), 24 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states 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 05:43:37,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 397.0) internal successors, (9925), 25 states have internal predecessors, (9925), 0 states have call successors, (0), 0 states 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 05:43:37,509 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 397.0) internal successors, (9925), 25 states have internal predecessors, (9925), 0 states have call successors, (0), 0 states 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 05:43:37,509 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 521 flow. Second operand 24 states and 4430 transitions. [2023-08-30 05:43:37,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 746 transitions, 5743 flow [2023-08-30 05:43:38,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 746 transitions, 5649 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-08-30 05:43:38,015 INFO L231 Difference]: Finished difference. Result has 136 places, 82 transitions, 671 flow [2023-08-30 05:43:38,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=671, PETRI_PLACES=136, PETRI_TRANSITIONS=82} [2023-08-30 05:43:38,015 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2023-08-30 05:43:38,015 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 82 transitions, 671 flow [2023-08-30 05:43:38,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states 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 05:43:38,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:38,016 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:43:38,024 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 05:43:38,216 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 05:43:38,217 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:43:38,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 506397479, now seen corresponding path program 2 times [2023-08-30 05:43:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943851521] [2023-08-30 05:43:38,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:43:38,218 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 05:43:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:38,218 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 05:43:38,220 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 05:43:38,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:43:38,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:43:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:43:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:38,425 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:43:38,426 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 05:43:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:43:38,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:43:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:43:39,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943851521] [2023-08-30 05:43:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943851521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:43:39,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:43:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 05:43:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106519745] [2023-08-30 05:43:39,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:43:39,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 05:43:39,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:39,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 05:43:39,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 05:43:47,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 397 [2023-08-30 05:43:47,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 82 transitions, 671 flow. Second operand has 18 states, 18 states have (on average 155.44444444444446) internal successors, (2798), 18 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states 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 05:43:47,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:47,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 397 [2023-08-30 05:43:47,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:59,935 INFO L130 PetriNetUnfolder]: 32779/48005 cut-off events. [2023-08-30 05:43:59,935 INFO L131 PetriNetUnfolder]: For 133495/133495 co-relation queries the response was YES. [2023-08-30 05:44:00,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178816 conditions, 48005 events. 32779/48005 cut-off events. For 133495/133495 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 298675 event pairs, 17652 based on Foata normal form. 222/48227 useless extension candidates. Maximal degree in co-relation 178762. Up to 29637 conditions per place. [2023-08-30 05:44:00,491 INFO L137 encePairwiseOnDemand]: 389/397 looper letters, 315 selfloop transitions, 24 changer transitions 0/339 dead transitions. [2023-08-30 05:44:00,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 339 transitions, 2711 flow [2023-08-30 05:44:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 05:44:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 05:44:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3146 transitions. [2023-08-30 05:44:00,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417075434177383 [2023-08-30 05:44:00,495 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3146 transitions. [2023-08-30 05:44:00,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3146 transitions. [2023-08-30 05:44:00,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:00,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3146 transitions. [2023-08-30 05:44:00,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 165.57894736842104) internal successors, (3146), 19 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states 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 05:44:00,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states 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 05:44:00,503 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states 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 05:44:00,503 INFO L175 Difference]: Start difference. First operand has 136 places, 82 transitions, 671 flow. Second operand 19 states and 3146 transitions. [2023-08-30 05:44:00,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 339 transitions, 2711 flow [2023-08-30 05:44:00,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 339 transitions, 2657 flow, removed 15 selfloop flow, removed 10 redundant places. [2023-08-30 05:44:00,968 INFO L231 Difference]: Finished difference. Result has 149 places, 96 transitions, 786 flow [2023-08-30 05:44:00,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=786, PETRI_PLACES=149, PETRI_TRANSITIONS=96} [2023-08-30 05:44:00,969 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 89 predicate places. [2023-08-30 05:44:00,969 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 96 transitions, 786 flow [2023-08-30 05:44:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 155.44444444444446) internal successors, (2798), 18 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states 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 05:44:00,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:00,970 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:00,978 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 (23)] Ended with exit code 0 [2023-08-30 05:44:01,172 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 05:44:01,173 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:44:01,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1920332437, now seen corresponding path program 3 times [2023-08-30 05:44:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078017715] [2023-08-30 05:44:01,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:44:01,174 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 05:44:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:01,174 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 05:44:01,176 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 05:44:01,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 05:44:01,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:44:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:44:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:01,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:44:01,485 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 05:44:01,537 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 13 treesize of output 9 [2023-08-30 05:44:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:44:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:44:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:44:01,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078017715] [2023-08-30 05:44:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078017715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:44:01,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:44:01,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 05:44:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18745752] [2023-08-30 05:44:01,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:44:01,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 05:44:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 05:44:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-30 05:44:03,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 397 [2023-08-30 05:44:03,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 96 transitions, 786 flow. Second operand has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states 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 05:44:03,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:03,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 397 [2023-08-30 05:44:03,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:10,843 INFO L130 PetriNetUnfolder]: 31201/45639 cut-off events. [2023-08-30 05:44:10,843 INFO L131 PetriNetUnfolder]: For 166466/166466 co-relation queries the response was YES. [2023-08-30 05:44:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186730 conditions, 45639 events. 31201/45639 cut-off events. For 166466/166466 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 283990 event pairs, 16334 based on Foata normal form. 160/45799 useless extension candidates. Maximal degree in co-relation 186670. Up to 28912 conditions per place. [2023-08-30 05:44:11,267 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 240 selfloop transitions, 21 changer transitions 0/261 dead transitions. [2023-08-30 05:44:11,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 261 transitions, 2279 flow [2023-08-30 05:44:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 05:44:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 05:44:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2492 transitions. [2023-08-30 05:44:11,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184718723761545 [2023-08-30 05:44:11,271 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2492 transitions. [2023-08-30 05:44:11,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2492 transitions. [2023-08-30 05:44:11,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:11,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2492 transitions. [2023-08-30 05:44:11,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.13333333333333) internal successors, (2492), 15 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states 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 05:44:11,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 397.0) internal successors, (6352), 16 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states 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 05:44:11,277 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 397.0) internal successors, (6352), 16 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states 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 05:44:11,277 INFO L175 Difference]: Start difference. First operand has 149 places, 96 transitions, 786 flow. Second operand 15 states and 2492 transitions. [2023-08-30 05:44:11,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 261 transitions, 2279 flow [2023-08-30 05:44:12,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 261 transitions, 2135 flow, removed 66 selfloop flow, removed 4 redundant places. [2023-08-30 05:44:12,206 INFO L231 Difference]: Finished difference. Result has 164 places, 100 transitions, 850 flow [2023-08-30 05:44:12,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=850, PETRI_PLACES=164, PETRI_TRANSITIONS=100} [2023-08-30 05:44:12,207 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2023-08-30 05:44:12,207 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 100 transitions, 850 flow [2023-08-30 05:44:12,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states 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 05:44:12,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:12,207 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:12,215 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 05:44:12,408 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 05:44:12,408 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:44:12,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2034447274, now seen corresponding path program 4 times [2023-08-30 05:44:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468044565] [2023-08-30 05:44:12,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:44:12,409 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 05:44:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:12,410 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 05:44:12,410 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 05:44:12,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:44:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:44:12,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 05:44:12,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:12,608 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:44:12,609 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 05:44:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:44:13,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:44:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:44:14,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468044565] [2023-08-30 05:44:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468044565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:44:14,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:44:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 05:44:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167650590] [2023-08-30 05:44:14,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:44:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 05:44:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 05:44:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:44:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-30 05:44:24,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 100 transitions, 850 flow. Second operand has 24 states, 24 states have (on average 154.16666666666666) internal successors, (3700), 24 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states 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 05:44:24,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:24,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-30 05:44:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:50,346 INFO L130 PetriNetUnfolder]: 48031/68793 cut-off events. [2023-08-30 05:44:50,346 INFO L131 PetriNetUnfolder]: For 278121/278121 co-relation queries the response was YES. [2023-08-30 05:44:50,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298387 conditions, 68793 events. 48031/68793 cut-off events. For 278121/278121 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 434544 event pairs, 7686 based on Foata normal form. 9486/78279 useless extension candidates. Maximal degree in co-relation 298321. Up to 14042 conditions per place. [2023-08-30 05:44:51,090 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 590 selfloop transitions, 46 changer transitions 0/636 dead transitions. [2023-08-30 05:44:51,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 636 transitions, 5095 flow [2023-08-30 05:44:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 05:44:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 05:44:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5939 transitions. [2023-08-30 05:44:51,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41554715924993 [2023-08-30 05:44:51,097 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5939 transitions. [2023-08-30 05:44:51,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5939 transitions. [2023-08-30 05:44:51,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:51,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5939 transitions. [2023-08-30 05:44:51,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states 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 05:44:51,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 397.0) internal successors, (14689), 37 states have internal predecessors, (14689), 0 states have call successors, (0), 0 states 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 05:44:51,114 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 397.0) internal successors, (14689), 37 states have internal predecessors, (14689), 0 states have call successors, (0), 0 states 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 05:44:51,114 INFO L175 Difference]: Start difference. First operand has 164 places, 100 transitions, 850 flow. Second operand 36 states and 5939 transitions. [2023-08-30 05:44:51,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 636 transitions, 5095 flow [2023-08-30 05:44:57,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 636 transitions, 5049 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 05:44:57,354 INFO L231 Difference]: Finished difference. Result has 197 places, 111 transitions, 1035 flow [2023-08-30 05:44:57,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1035, PETRI_PLACES=197, PETRI_TRANSITIONS=111} [2023-08-30 05:44:57,354 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 137 predicate places. [2023-08-30 05:44:57,355 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 111 transitions, 1035 flow [2023-08-30 05:44:57,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 154.16666666666666) internal successors, (3700), 24 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states 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 05:44:57,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:57,355 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:57,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 05:44:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:44:57,566 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:44:57,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash -694757469, now seen corresponding path program 5 times [2023-08-30 05:44:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:57,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722751946] [2023-08-30 05:44:57,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 05:44:57,567 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 05:44:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:57,567 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:44:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 05:44:57,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 05:44:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:44:57,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:44:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:57,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:44:57,779 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 05:44:58,089 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 7 treesize of output 5 [2023-08-30 05:44:58,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 10 [2023-08-30 05:44:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:44:58,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:44:58,270 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 8 treesize of output 6 [2023-08-30 05:44:58,289 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 05:44:58,291 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 05:44:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:44:59,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:59,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722751946] [2023-08-30 05:44:59,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722751946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:44:59,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:44:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-30 05:44:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064121144] [2023-08-30 05:44:59,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:44:59,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 05:44:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 05:44:59,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-30 05:45:12,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-30 05:45:12,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 111 transitions, 1035 flow. Second operand has 22 states, 22 states have (on average 154.27272727272728) internal successors, (3394), 22 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states 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 05:45:12,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:45:12,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-30 05:45:12,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:45:27,336 INFO L130 PetriNetUnfolder]: 47467/68001 cut-off events. [2023-08-30 05:45:27,337 INFO L131 PetriNetUnfolder]: For 286304/286304 co-relation queries the response was YES. [2023-08-30 05:45:27,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322905 conditions, 68001 events. 47467/68001 cut-off events. For 286304/286304 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 414171 event pairs, 31114 based on Foata normal form. 80/68081 useless extension candidates. Maximal degree in co-relation 322834. Up to 59523 conditions per place. [2023-08-30 05:45:28,096 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 361 selfloop transitions, 38 changer transitions 0/399 dead transitions. [2023-08-30 05:45:28,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 399 transitions, 3349 flow [2023-08-30 05:45:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 05:45:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 05:45:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3770 transitions. [2023-08-30 05:45:28,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41287920271602235 [2023-08-30 05:45:28,101 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3770 transitions. [2023-08-30 05:45:28,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3770 transitions. [2023-08-30 05:45:28,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:45:28,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3770 transitions. [2023-08-30 05:45:28,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 163.91304347826087) internal successors, (3770), 23 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states 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 05:45:28,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 397.0) internal successors, (9528), 24 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states 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 05:45:28,112 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 397.0) internal successors, (9528), 24 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states 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 05:45:28,112 INFO L175 Difference]: Start difference. First operand has 197 places, 111 transitions, 1035 flow. Second operand 23 states and 3770 transitions. [2023-08-30 05:45:28,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 399 transitions, 3349 flow [2023-08-30 05:45:37,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 399 transitions, 3134 flow, removed 37 selfloop flow, removed 31 redundant places. [2023-08-30 05:45:37,658 INFO L231 Difference]: Finished difference. Result has 189 places, 125 transitions, 1040 flow [2023-08-30 05:45:37,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1040, PETRI_PLACES=189, PETRI_TRANSITIONS=125} [2023-08-30 05:45:37,659 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 129 predicate places. [2023-08-30 05:45:37,659 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 125 transitions, 1040 flow [2023-08-30 05:45:37,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 154.27272727272728) internal successors, (3394), 22 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states 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 05:45:37,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:45:37,660 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:45:37,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 05:45:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:45:37,860 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:45:37,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:45:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2143425492, now seen corresponding path program 3 times [2023-08-30 05:45:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:45:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363948338] [2023-08-30 05:45:37,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:45:37,861 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 05:45:37,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:45:37,862 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:45:37,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 05:45:38,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 05:45:38,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:45:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:45:38,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:45:38,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:45:38,165 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 05:45:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:45:38,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:45:38,489 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 8 treesize of output 6 [2023-08-30 05:45:38,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 9 [2023-08-30 05:45:38,508 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 05:45:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:45:39,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:45:39,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363948338] [2023-08-30 05:45:39,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363948338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:45:39,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:45:39,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 05:45:39,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254668927] [2023-08-30 05:45:39,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:45:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 05:45:39,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:45:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 05:45:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-30 05:45:46,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 397 [2023-08-30 05:45:46,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 125 transitions, 1040 flow. Second operand has 20 states, 20 states have (on average 156.45) internal successors, (3129), 20 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states 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 05:45:46,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:45:46,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 397 [2023-08-30 05:45:46,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:46:01,845 INFO L130 PetriNetUnfolder]: 46623/66957 cut-off events. [2023-08-30 05:46:01,846 INFO L131 PetriNetUnfolder]: For 290328/290328 co-relation queries the response was YES. [2023-08-30 05:46:02,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274932 conditions, 66957 events. 46623/66957 cut-off events. For 290328/290328 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 411711 event pairs, 28238 based on Foata normal form. 222/67179 useless extension candidates. Maximal degree in co-relation 274869. Up to 53750 conditions per place. [2023-08-30 05:46:02,536 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 440 selfloop transitions, 34 changer transitions 0/474 dead transitions. [2023-08-30 05:46:02,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 474 transitions, 3910 flow [2023-08-30 05:46:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 05:46:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 05:46:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3498 transitions. [2023-08-30 05:46:02,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195753868297949 [2023-08-30 05:46:02,540 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3498 transitions. [2023-08-30 05:46:02,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3498 transitions. [2023-08-30 05:46:02,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:46:02,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3498 transitions. [2023-08-30 05:46:02,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 166.57142857142858) internal successors, (3498), 21 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states 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 05:46:02,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 397.0) internal successors, (8734), 22 states have internal predecessors, (8734), 0 states have call successors, (0), 0 states 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 05:46:02,550 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 397.0) internal successors, (8734), 22 states have internal predecessors, (8734), 0 states have call successors, (0), 0 states 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 05:46:02,551 INFO L175 Difference]: Start difference. First operand has 189 places, 125 transitions, 1040 flow. Second operand 21 states and 3498 transitions. [2023-08-30 05:46:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 474 transitions, 3910 flow [2023-08-30 05:46:10,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 474 transitions, 3800 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-30 05:46:10,355 INFO L231 Difference]: Finished difference. Result has 204 places, 127 transitions, 1142 flow [2023-08-30 05:46:10,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1142, PETRI_PLACES=204, PETRI_TRANSITIONS=127} [2023-08-30 05:46:10,355 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 144 predicate places. [2023-08-30 05:46:10,355 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 127 transitions, 1142 flow [2023-08-30 05:46:10,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 156.45) internal successors, (3129), 20 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states 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 05:46:10,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:46:10,356 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:46:10,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 05:46:10,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:46:10,556 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:46:10,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:46:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2026595935, now seen corresponding path program 4 times [2023-08-30 05:46:10,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:46:10,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261367854] [2023-08-30 05:46:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:46:10,557 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 05:46:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:46:10,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:46:10,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 05:46:10,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:46:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:46:10,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 05:46:10,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:46:10,772 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:46:10,773 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 05:46:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:46:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:46:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:46:12,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:46:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261367854] [2023-08-30 05:46:12,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261367854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:46:12,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:46:12,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 05:46:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008251942] [2023-08-30 05:46:12,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:46:12,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 05:46:12,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:46:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 05:46:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:46:23,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-30 05:46:23,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 127 transitions, 1142 flow. Second operand has 24 states, 24 states have (on average 154.33333333333334) internal successors, (3704), 24 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states 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 05:46:23,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:46:23,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-30 05:46:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:46:55,821 INFO L130 PetriNetUnfolder]: 73131/102997 cut-off events. [2023-08-30 05:46:55,821 INFO L131 PetriNetUnfolder]: For 543435/543435 co-relation queries the response was YES. [2023-08-30 05:46:56,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463004 conditions, 102997 events. 73131/102997 cut-off events. For 543435/543435 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 646956 event pairs, 12234 based on Foata normal form. 15392/118389 useless extension candidates. Maximal degree in co-relation 462932. Up to 23498 conditions per place. [2023-08-30 05:46:57,137 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 628 selfloop transitions, 58 changer transitions 0/686 dead transitions. [2023-08-30 05:46:57,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 686 transitions, 5340 flow [2023-08-30 05:46:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 05:46:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 05:46:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6081 transitions. [2023-08-30 05:46:57,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41398325277418474 [2023-08-30 05:46:57,144 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6081 transitions. [2023-08-30 05:46:57,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6081 transitions. [2023-08-30 05:46:57,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:46:57,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6081 transitions. [2023-08-30 05:46:57,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 164.35135135135135) internal successors, (6081), 37 states have internal predecessors, (6081), 0 states have call successors, (0), 0 states 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 05:46:57,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states 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 05:46:57,160 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states 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 05:46:57,160 INFO L175 Difference]: Start difference. First operand has 204 places, 127 transitions, 1142 flow. Second operand 37 states and 6081 transitions. [2023-08-30 05:46:57,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 686 transitions, 5340 flow [2023-08-30 05:47:05,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 686 transitions, 5259 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-08-30 05:47:05,589 INFO L231 Difference]: Finished difference. Result has 236 places, 138 transitions, 1327 flow [2023-08-30 05:47:05,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1327, PETRI_PLACES=236, PETRI_TRANSITIONS=138} [2023-08-30 05:47:05,589 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 176 predicate places. [2023-08-30 05:47:05,590 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 138 transitions, 1327 flow [2023-08-30 05:47:05,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 154.33333333333334) internal successors, (3704), 24 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states 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 05:47:05,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:47:05,590 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 05:47:05,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 05:47:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:47:05,791 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:47:05,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:47:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1856037898, now seen corresponding path program 6 times [2023-08-30 05:47:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:47:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807977777] [2023-08-30 05:47:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 05:47:05,791 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 05:47:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:47:05,792 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:47:05,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 05:47:06,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 05:47:06,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:47:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:47:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:47:06,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:47:06,233 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 05:47:06,347 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 13 treesize of output 9 [2023-08-30 05:47:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:47:06,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:47:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 05:47:07,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:47:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807977777] [2023-08-30 05:47:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807977777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:47:07,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:47:07,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-08-30 05:47:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045666990] [2023-08-30 05:47:07,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:47:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 05:47:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:47:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 05:47:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-08-30 05:47:13,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 397 [2023-08-30 05:47:13,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 138 transitions, 1327 flow. Second operand has 25 states, 25 states have (on average 157.24) internal successors, (3931), 25 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states 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 05:47:13,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:47:13,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 397 [2023-08-30 05:47:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:47:34,599 INFO L130 PetriNetUnfolder]: 70117/98957 cut-off events. [2023-08-30 05:47:34,599 INFO L131 PetriNetUnfolder]: For 638774/638774 co-relation queries the response was YES. [2023-08-30 05:47:35,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483134 conditions, 98957 events. 70117/98957 cut-off events. For 638774/638774 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 614449 event pairs, 38826 based on Foata normal form. 148/99105 useless extension candidates. Maximal degree in co-relation 483059. Up to 67671 conditions per place. [2023-08-30 05:47:36,186 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 609 selfloop transitions, 49 changer transitions 0/658 dead transitions. [2023-08-30 05:47:36,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 658 transitions, 6867 flow [2023-08-30 05:47:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 05:47:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 05:47:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6178 transitions. [2023-08-30 05:47:36,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42058683368507044 [2023-08-30 05:47:36,192 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6178 transitions. [2023-08-30 05:47:36,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6178 transitions. [2023-08-30 05:47:36,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:47:36,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6178 transitions. [2023-08-30 05:47:36,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 166.97297297297297) internal successors, (6178), 37 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states 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 05:47:36,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states 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 05:47:36,208 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states 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 05:47:36,208 INFO L175 Difference]: Start difference. First operand has 236 places, 138 transitions, 1327 flow. Second operand 37 states and 6178 transitions. [2023-08-30 05:47:36,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 658 transitions, 6867 flow [2023-08-30 05:47:54,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 658 transitions, 5356 flow, removed 460 selfloop flow, removed 25 redundant places. [2023-08-30 05:47:54,217 INFO L231 Difference]: Finished difference. Result has 252 places, 153 transitions, 1309 flow [2023-08-30 05:47:54,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1309, PETRI_PLACES=252, PETRI_TRANSITIONS=153} [2023-08-30 05:47:54,217 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 192 predicate places. [2023-08-30 05:47:54,217 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 153 transitions, 1309 flow [2023-08-30 05:47:54,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 157.24) internal successors, (3931), 25 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states 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 05:47:54,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:47:54,218 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 05:47:54,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 05:47:54,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:47:54,419 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:47:54,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:47:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1918483722, now seen corresponding path program 7 times [2023-08-30 05:47:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:47:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595857533] [2023-08-30 05:47:54,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 05:47:54,420 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 05:47:54,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:47:54,421 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:47:54,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 05:47:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:47:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 05:47:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:47:54,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:47:54,682 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 05:47:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:47:55,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:47:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:47:58,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:47:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595857533] [2023-08-30 05:47:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595857533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:47:58,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:47:58,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 37 [2023-08-30 05:47:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418874764] [2023-08-30 05:47:58,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:47:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 05:47:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:47:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 05:47:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 05:48:30,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 397 [2023-08-30 05:48:30,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 153 transitions, 1309 flow. Second operand has 38 states, 38 states have (on average 150.1578947368421) internal successors, (5706), 38 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states 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 05:48:30,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:48:30,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 397 [2023-08-30 05:48:30,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:49:23,689 INFO L130 PetriNetUnfolder]: 72355/103037 cut-off events. [2023-08-30 05:49:23,689 INFO L131 PetriNetUnfolder]: For 633944/633944 co-relation queries the response was YES. [2023-08-30 05:49:24,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434896 conditions, 103037 events. 72355/103037 cut-off events. For 633944/633944 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 664116 event pairs, 32810 based on Foata normal form. 294/103331 useless extension candidates. Maximal degree in co-relation 434820. Up to 54138 conditions per place. [2023-08-30 05:49:25,086 INFO L137 encePairwiseOnDemand]: 387/397 looper letters, 1585 selfloop transitions, 127 changer transitions 0/1712 dead transitions. [2023-08-30 05:49:25,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1712 transitions, 14669 flow [2023-08-30 05:49:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-30 05:49:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-30 05:49:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 12707 transitions. [2023-08-30 05:49:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051589452539617 [2023-08-30 05:49:25,102 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 12707 transitions. [2023-08-30 05:49:25,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 12707 transitions. [2023-08-30 05:49:25,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:49:25,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 12707 transitions. [2023-08-30 05:49:25,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 160.84810126582278) internal successors, (12707), 79 states have internal predecessors, (12707), 0 states have call successors, (0), 0 states 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 05:49:25,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 397.0) internal successors, (31760), 80 states have internal predecessors, (31760), 0 states have call successors, (0), 0 states 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 05:49:25,138 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 397.0) internal successors, (31760), 80 states have internal predecessors, (31760), 0 states have call successors, (0), 0 states 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 05:49:25,138 INFO L175 Difference]: Start difference. First operand has 252 places, 153 transitions, 1309 flow. Second operand 79 states and 12707 transitions. [2023-08-30 05:49:25,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1712 transitions, 14669 flow [2023-08-30 05:50:01,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1712 transitions, 14600 flow, removed 9 selfloop flow, removed 19 redundant places. [2023-08-30 05:50:01,108 INFO L231 Difference]: Finished difference. Result has 321 places, 217 transitions, 2173 flow [2023-08-30 05:50:01,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=2173, PETRI_PLACES=321, PETRI_TRANSITIONS=217} [2023-08-30 05:50:01,109 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 261 predicate places. [2023-08-30 05:50:01,109 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 217 transitions, 2173 flow [2023-08-30 05:50:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 150.1578947368421) internal successors, (5706), 38 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states 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 05:50:01,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:50:01,110 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:50:01,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-30 05:50:01,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:50:01,320 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:50:01,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:50:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1932636167, now seen corresponding path program 5 times [2023-08-30 05:50:01,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:50:01,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230827152] [2023-08-30 05:50:01,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 05:50:01,321 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 05:50:01,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:50:01,322 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:50:01,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 05:50:01,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 05:50:01,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:50:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 05:50:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:50:01,687 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:50:01,688 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 05:50:02,199 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 7 treesize of output 5 [2023-08-30 05:50:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:50:02,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:50:02,460 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 8 treesize of output 6 [2023-08-30 05:50:02,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 9 [2023-08-30 05:50:02,485 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 05:50:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:50:05,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:50:05,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230827152] [2023-08-30 05:50:05,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230827152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:50:05,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:50:05,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2023-08-30 05:50:05,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403709052] [2023-08-30 05:50:05,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:50:05,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 05:50:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:50:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 05:50:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 05:50:40,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-30 05:50:40,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 217 transitions, 2173 flow. Second operand has 35 states, 35 states have (on average 154.28571428571428) internal successors, (5400), 35 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states 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 05:50:40,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:50:40,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-30 05:50:40,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:51:27,819 INFO L130 PetriNetUnfolder]: 73727/106305 cut-off events. [2023-08-30 05:51:27,819 INFO L131 PetriNetUnfolder]: For 837260/837260 co-relation queries the response was YES. [2023-08-30 05:51:29,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532900 conditions, 106305 events. 73727/106305 cut-off events. For 837260/837260 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 699187 event pairs, 41804 based on Foata normal form. 324/106629 useless extension candidates. Maximal degree in co-relation 532814. Up to 76479 conditions per place. [2023-08-30 05:51:29,543 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 1143 selfloop transitions, 114 changer transitions 0/1257 dead transitions. [2023-08-30 05:51:29,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1257 transitions, 12787 flow [2023-08-30 05:51:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-30 05:51:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-30 05:51:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 8908 transitions. [2023-08-30 05:51:29,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415523836178748 [2023-08-30 05:51:29,553 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 8908 transitions. [2023-08-30 05:51:29,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 8908 transitions. [2023-08-30 05:51:29,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:51:29,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 8908 transitions. [2023-08-30 05:51:29,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 164.96296296296296) internal successors, (8908), 54 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states 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 05:51:29,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 397.0) internal successors, (21835), 55 states have internal predecessors, (21835), 0 states have call successors, (0), 0 states 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 05:51:29,578 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 397.0) internal successors, (21835), 55 states have internal predecessors, (21835), 0 states have call successors, (0), 0 states 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 05:51:29,578 INFO L175 Difference]: Start difference. First operand has 321 places, 217 transitions, 2173 flow. Second operand 54 states and 8908 transitions. [2023-08-30 05:51:29,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1257 transitions, 12787 flow [2023-08-30 05:52:16,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1257 transitions, 10786 flow, removed 508 selfloop flow, removed 45 redundant places. [2023-08-30 05:52:16,421 INFO L231 Difference]: Finished difference. Result has 341 places, 266 transitions, 2554 flow [2023-08-30 05:52:16,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2554, PETRI_PLACES=341, PETRI_TRANSITIONS=266} [2023-08-30 05:52:16,422 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 281 predicate places. [2023-08-30 05:52:16,422 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 266 transitions, 2554 flow [2023-08-30 05:52:16,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 154.28571428571428) internal successors, (5400), 35 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states 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 05:52:16,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:52:16,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:52:16,435 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 05:52:16,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:52:16,635 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:52:16,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:52:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash 929375108, now seen corresponding path program 1 times [2023-08-30 05:52:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:52:16,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888528565] [2023-08-30 05:52:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:52:16,636 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 05:52:16,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:52:16,638 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:52:16,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 05:52:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:52:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:52:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:52:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:52:16,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:52:16,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:52:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888528565] [2023-08-30 05:52:16,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888528565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:52:16,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:52:16,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:52:16,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950346925] [2023-08-30 05:52:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:52:16,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:52:16,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:52:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:52:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:52:16,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 397 [2023-08-30 05:52:16,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 266 transitions, 2554 flow. Second operand has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states 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 05:52:16,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:52:16,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 397 [2023-08-30 05:52:16,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:52:41,525 INFO L130 PetriNetUnfolder]: 91276/133856 cut-off events. [2023-08-30 05:52:41,525 INFO L131 PetriNetUnfolder]: For 910176/910176 co-relation queries the response was YES. [2023-08-30 05:52:43,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685827 conditions, 133856 events. 91276/133856 cut-off events. For 910176/910176 co-relation queries the response was YES. Maximal size of possible extension queue 2275. Compared 958809 event pairs, 12654 based on Foata normal form. 162/134018 useless extension candidates. Maximal degree in co-relation 685737. Up to 94218 conditions per place. [2023-08-30 05:52:43,681 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 492 selfloop transitions, 22 changer transitions 153/667 dead transitions. [2023-08-30 05:52:43,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 667 transitions, 7523 flow [2023-08-30 05:52:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:52:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:52:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 903 transitions. [2023-08-30 05:52:43,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454911838790932 [2023-08-30 05:52:43,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 903 transitions. [2023-08-30 05:52:43,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 903 transitions. [2023-08-30 05:52:43,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:52:43,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 903 transitions. [2023-08-30 05:52:43,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 05:52:43,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:52:43,910 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 05:52:43,910 INFO L175 Difference]: Start difference. First operand has 341 places, 266 transitions, 2554 flow. Second operand 5 states and 903 transitions. [2023-08-30 05:52:43,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 667 transitions, 7523 flow [2023-08-30 05:54:38,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 667 transitions, 7061 flow, removed 90 selfloop flow, removed 30 redundant places. [2023-08-30 05:54:38,145 INFO L231 Difference]: Finished difference. Result has 317 places, 269 transitions, 2394 flow [2023-08-30 05:54:38,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2394, PETRI_PLACES=317, PETRI_TRANSITIONS=269} [2023-08-30 05:54:38,146 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 257 predicate places. [2023-08-30 05:54:38,146 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 269 transitions, 2394 flow [2023-08-30 05:54:38,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states 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 05:54:38,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:54:38,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:54:38,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 05:54:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:54:38,350 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 05:54:38,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:54:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -223291108, now seen corresponding path program 2 times [2023-08-30 05:54:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:54:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255334785] [2023-08-30 05:54:38,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:54:38,351 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 05:54:38,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:54:38,351 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:54:38,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 05:54:38,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:54:38,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:54:38,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:54:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:54:38,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:54:38,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 207 treesize of output 119 [2023-08-30 05:54:38,959 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 119 treesize of output 111 [2023-08-30 05:54:38,961 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 111 treesize of output 103 [2023-08-30 05:54:45,068 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:54:45,189 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 05:54:45,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:54:47,798 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-08-30 05:54:47,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 221 treesize of output 99 [2023-08-30 05:54:47,809 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 93 treesize of output 87 [2023-08-30 05:54:47,962 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 05:54:47,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:54:47,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255334785] [2023-08-30 05:54:47,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255334785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:54:47,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:54:47,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 05:54:47,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503870136] [2023-08-30 05:54:47,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:54:47,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:54:47,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:54:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:54:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=103, Unknown=1, NotChecked=0, Total=132 [2023-08-30 05:54:50,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:52,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:54,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:56,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:58,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:55:00,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15