./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:39:02,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:39:02,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:39:02,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:39:02,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:39:02,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:39:02,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:39:02,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:39:02,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:39:02,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:39:02,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:39:02,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:39:02,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:39:02,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:39:02,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:39:02,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:39:02,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:39:02,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:39:02,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:39:02,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:39:02,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:39:02,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:39:02,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:39:02,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:39:02,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:39:02,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:39:02,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:39:02,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:39:02,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:39:02,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:39:02,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:39:02,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:39:02,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:39:02,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:39:02,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:39:02,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:39:02,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:39:02,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:39:02,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:39:02,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:39:02,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:39:02,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:39:02,327 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:39:02,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:39:02,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:39:02,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:39:02,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:39:02,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:39:02,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:39:02,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:39:02,331 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:39:02,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:39:02,332 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:39:02,332 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:39:02,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:39:02,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:39:02,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:39:02,333 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:39:02,333 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:39:02,333 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:39:02,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:39:02,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:39:02,334 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:39:02,334 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:39:02,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:39:02,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:39:02,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:39:02,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:02,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:39:02,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:39:02,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:39:02,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:39:02,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:39:02,336 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:39:02,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:39:02,337 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:39:02,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:39:02,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:39:02,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:39:02,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:39:02,703 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:39:02,703 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:39:02,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 06:39:03,987 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:39:04,207 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:39:04,208 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 06:39:04,213 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa687ade/d0b2cad4b7d34a1f970fb898535722c9/FLAGcf6febb31 [2023-08-30 06:39:04,225 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa687ade/d0b2cad4b7d34a1f970fb898535722c9 [2023-08-30 06:39:04,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:39:04,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:39:04,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:04,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:39:04,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:39:04,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:04" (1/1) ... [2023-08-30 06:39:04,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4b24ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:04, skipping insertion in model container [2023-08-30 06:39:04,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:04" (1/1) ... [2023-08-30 06:39:04,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:39:04,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:04,456 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 06:39:04,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:04,487 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:39:04,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6afa9ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:04, skipping insertion in model container [2023-08-30 06:39:04,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:04,490 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:39:04,491 INFO L158 Benchmark]: Toolchain (without parser) took 261.76ms. Allocated memory is still 69.2MB. Free memory was 44.9MB in the beginning and 34.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:39:04,492 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:39:04,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.79ms. Allocated memory is still 69.2MB. Free memory was 44.7MB in the beginning and 35.2MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:39:04,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.79ms. Allocated memory is still 69.2MB. Free memory was 44.7MB in the beginning and 35.2MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:39:06,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:39:06,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:39:06,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:39:06,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:39:06,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:39:06,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:39:06,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:39:06,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:39:06,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:39:06,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:39:06,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:39:06,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:39:06,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:39:06,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:39:06,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:39:06,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:39:06,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:39:06,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:39:06,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:39:06,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:39:06,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:39:06,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:39:06,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:39:06,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:39:06,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:39:06,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:39:06,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:39:06,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:39:06,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:39:06,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:39:06,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:39:06,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:39:06,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:39:06,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:39:06,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:39:06,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:39:06,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:39:06,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:39:06,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:39:06,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:39:06,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:39:06,442 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:39:06,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:39:06,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:39:06,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:39:06,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:39:06,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:39:06,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:39:06,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:39:06,446 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:39:06,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:39:06,448 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:39:06,448 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:39:06,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:39:06,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:39:06,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:39:06,449 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:39:06,449 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:39:06,449 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:39:06,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:39:06,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:39:06,450 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:39:06,450 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:39:06,450 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:39:06,450 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:39:06,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:39:06,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:39:06,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:39:06,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:06,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:39:06,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:39:06,452 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:39:06,452 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:39:06,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:39:06,452 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:39:06,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:39:06,453 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:39:06,453 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:39:06,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:39:06,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:39:06,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:39:06,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:39:06,803 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:39:06,803 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:39:06,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 06:39:07,910 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:39:08,102 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:39:08,103 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 06:39:08,110 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21225ec75/a00ff327f2c440aeb9f908cc9c6ebb36/FLAG5fb839214 [2023-08-30 06:39:08,131 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21225ec75/a00ff327f2c440aeb9f908cc9c6ebb36 [2023-08-30 06:39:08,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:39:08,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:39:08,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:08,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:39:08,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:39:08,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da43010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08, skipping insertion in model container [2023-08-30 06:39:08,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:39:08,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:08,378 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 06:39:08,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:08,416 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:39:08,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:08,454 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 06:39:08,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:08,474 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:39:08,505 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 06:39:08,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:08,531 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:39:08,531 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:39:08,537 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:39:08,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08 WrapperNode [2023-08-30 06:39:08,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:08,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:39:08,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:39:08,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:39:08,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,613 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 265 [2023-08-30 06:39:08,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:39:08,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:39:08,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:39:08,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:39:08,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,659 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:39:08,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:39:08,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:39:08,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:39:08,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (1/1) ... [2023-08-30 06:39:08,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:08,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:39:08,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:39:08,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:39:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:39:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:39:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:39:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:39:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:39:08,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:39:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:39:08,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:39:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:39:08,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:39:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:39:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:39:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:39:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:39:08,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:39:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:39:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:39:08,750 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:39:08,844 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:39:08,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:39:09,600 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:39:09,912 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:39:09,912 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 06:39:09,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:09 BoogieIcfgContainer [2023-08-30 06:39:09,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:39:09,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:39:09,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:39:09,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:39:09,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:39:08" (1/3) ... [2023-08-30 06:39:09,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e137185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:09, skipping insertion in model container [2023-08-30 06:39:09,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:08" (2/3) ... [2023-08-30 06:39:09,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e137185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:09, skipping insertion in model container [2023-08-30 06:39:09,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:09" (3/3) ... [2023-08-30 06:39:09,923 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-08-30 06:39:09,938 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:39:09,938 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 06:39:09,938 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:39:10,047 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:39:10,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 208 transitions, 440 flow [2023-08-30 06:39:10,183 INFO L130 PetriNetUnfolder]: 16/205 cut-off events. [2023-08-30 06:39:10,184 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:39:10,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 205 events. 16/205 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 238 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-08-30 06:39:10,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 208 transitions, 440 flow [2023-08-30 06:39:10,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 201 transitions, 420 flow [2023-08-30 06:39:10,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:39:10,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 201 transitions, 420 flow [2023-08-30 06:39:10,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 201 transitions, 420 flow [2023-08-30 06:39:10,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 420 flow [2023-08-30 06:39:10,279 INFO L130 PetriNetUnfolder]: 16/201 cut-off events. [2023-08-30 06:39:10,280 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:39:10,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 16/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 237 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-08-30 06:39:10,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 06:39:38,640 INFO L134 LiptonReduction]: Checked pairs total: 3527 [2023-08-30 06:39:38,641 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-30 06:39:38,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:39:38,658 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;@72bff09c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:39:38,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-30 06:39:38,661 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:39:38,661 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:39:38,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:38,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:39:38,662 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 06:39:38,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash 35161, now seen corresponding path program 1 times [2023-08-30 06:39:38,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255609732] [2023-08-30 06:39:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:38,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:38,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:38,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:38,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:39:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:39:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:39,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:39:39,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:39:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:39,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:39,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255609732] [2023-08-30 06:39:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255609732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555729728] [2023-08-30 06:39:39,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:39,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-30 06:39:39,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 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 06:39:39,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:39,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-30 06:39:39,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:42,190 INFO L130 PetriNetUnfolder]: 15053/18713 cut-off events. [2023-08-30 06:39:42,191 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-30 06:39:42,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37660 conditions, 18713 events. 15053/18713 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 1779. Compared 90038 event pairs, 7293 based on Foata normal form. 0/3655 useless extension candidates. Maximal degree in co-relation 16870. Up to 9306 conditions per place. [2023-08-30 06:39:42,355 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 95 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-30 06:39:42,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 438 flow [2023-08-30 06:39:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:39:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:39:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-30 06:39:42,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830575256107171 [2023-08-30 06:39:42,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-30 06:39:42,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-30 06:39:42,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:42,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-30 06:39:42,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:42,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:42,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:42,406 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 613 transitions. [2023-08-30 06:39:42,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 438 flow [2023-08-30 06:39:42,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 414 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:39:42,433 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 146 flow [2023-08-30 06:39:42,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-30 06:39:42,442 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-30 06:39:42,443 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 146 flow [2023-08-30 06:39:42,443 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 06:39:42,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:42,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:39:42,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:39:42,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:42,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:42,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 35162, now seen corresponding path program 1 times [2023-08-30 06:39:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216160444] [2023-08-30 06:39:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:42,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:42,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:42,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:42,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:39:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:39:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:42,797 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:39:42,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:39:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:42,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:42,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216160444] [2023-08-30 06:39:42,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216160444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:42,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198970399] [2023-08-30 06:39:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:42,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-30 06:39:42,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 146 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 06:39:42,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:42,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-30 06:39:42,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:45,151 INFO L130 PetriNetUnfolder]: 15067/18723 cut-off events. [2023-08-30 06:39:45,152 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 06:39:45,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37465 conditions, 18723 events. 15067/18723 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1878. Compared 90630 event pairs, 7296 based on Foata normal form. 2/3513 useless extension candidates. Maximal degree in co-relation 18721. Up to 18611 conditions per place. [2023-08-30 06:39:45,249 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 06:39:45,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 246 flow [2023-08-30 06:39:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:39:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:39:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-30 06:39:45,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44208037825059104 [2023-08-30 06:39:45,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-30 06:39:45,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-30 06:39:45,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:45,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-30 06:39:45,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:45,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:45,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:45,258 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 146 flow. Second operand 3 states and 561 transitions. [2023-08-30 06:39:45,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 246 flow [2023-08-30 06:39:45,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:39:45,261 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 136 flow [2023-08-30 06:39:45,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-08-30 06:39:45,262 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-30 06:39:45,262 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 136 flow [2023-08-30 06:39:45,262 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 06:39:45,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:45,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:39:45,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:39:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:45,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:45,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1093315, now seen corresponding path program 1 times [2023-08-30 06:39:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:45,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238266911] [2023-08-30 06:39:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:45,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:45,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:39:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:39:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:45,677 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:39:45,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:39:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:45,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:39:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:45,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238266911] [2023-08-30 06:39:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238266911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:39:45,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:39:45,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:39:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093724966] [2023-08-30 06:39:45,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:39:45,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:39:45,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:39:45,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:39:47,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-08-30 06:39:47,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:47,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:47,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-08-30 06:39:47,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:48,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:39:51,514 INFO L130 PetriNetUnfolder]: 22580/28067 cut-off events. [2023-08-30 06:39:51,514 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 06:39:51,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56158 conditions, 28067 events. 22580/28067 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 2200. Compared 140309 event pairs, 10938 based on Foata normal form. 0/5565 useless extension candidates. Maximal degree in co-relation 56150. Up to 9307 conditions per place. [2023-08-30 06:39:51,670 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 134 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2023-08-30 06:39:51,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 156 transitions, 674 flow [2023-08-30 06:39:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:39:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:39:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1119 transitions. [2023-08-30 06:39:51,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089834515366433 [2023-08-30 06:39:51,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1119 transitions. [2023-08-30 06:39:51,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1119 transitions. [2023-08-30 06:39:51,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:51,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1119 transitions. [2023-08-30 06:39:51,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.5) internal successors, (1119), 6 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:51,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:51,684 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:51,684 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 136 flow. Second operand 6 states and 1119 transitions. [2023-08-30 06:39:51,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 156 transitions, 674 flow [2023-08-30 06:39:51,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 156 transitions, 673 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:39:51,687 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 280 flow [2023-08-30 06:39:51,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-30 06:39:51,689 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-30 06:39:51,689 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 280 flow [2023-08-30 06:39:51,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:51,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:51,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:39:51,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:39:51,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:51,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:51,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1094234, now seen corresponding path program 1 times [2023-08-30 06:39:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058728994] [2023-08-30 06:39:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:51,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:51,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:51,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:39:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:39:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:52,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:52,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058728994] [2023-08-30 06:39:52,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058728994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:52,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:39:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408974402] [2023-08-30 06:39:52,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:52,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:39:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:39:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:39:52,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-30 06:39:52,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:52,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:52,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-30 06:39:52,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:54,131 INFO L130 PetriNetUnfolder]: 15075/18738 cut-off events. [2023-08-30 06:39:54,131 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 06:39:54,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37560 conditions, 18738 events. 15075/18738 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1878. Compared 90678 event pairs, 7296 based on Foata normal form. 3/3526 useless extension candidates. Maximal degree in co-relation 37547. Up to 18621 conditions per place. [2023-08-30 06:39:54,259 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 59 selfloop transitions, 7 changer transitions 1/70 dead transitions. [2023-08-30 06:39:54,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 414 flow [2023-08-30 06:39:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:39:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:39:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-08-30 06:39:54,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391252955082742 [2023-08-30 06:39:54,262 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-08-30 06:39:54,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-08-30 06:39:54,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:54,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-08-30 06:39:54,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,270 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,270 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 280 flow. Second operand 4 states and 743 transitions. [2023-08-30 06:39:54,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 414 flow [2023-08-30 06:39:54,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 395 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:39:54,274 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 290 flow [2023-08-30 06:39:54,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-30 06:39:54,276 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-08-30 06:39:54,276 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 290 flow [2023-08-30 06:39:54,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:54,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:39:54,287 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 (5)] Ended with exit code 0 [2023-08-30 06:39:54,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:54,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:54,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1050807926, now seen corresponding path program 1 times [2023-08-30 06:39:54,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:54,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182912200] [2023-08-30 06:39:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:54,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:54,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:54,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:54,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:39:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:39:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:54,695 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:39:54,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 06:39:55,138 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 06:39:55,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:39:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:39:55,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:55,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:55,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182912200] [2023-08-30 06:39:55,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182912200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:55,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:55,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:55,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277349748] [2023-08-30 06:39:55,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:55,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:55,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-08-30 06:39:55,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:55,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:55,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-08-30 06:39:55,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:57,347 INFO L130 PetriNetUnfolder]: 11643/14617 cut-off events. [2023-08-30 06:39:57,347 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 06:39:57,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29318 conditions, 14617 events. 11643/14617 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 70593 event pairs, 5630 based on Foata normal form. 0/3033 useless extension candidates. Maximal degree in co-relation 29302. Up to 14505 conditions per place. [2023-08-30 06:39:57,444 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 06:39:57,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 390 flow [2023-08-30 06:39:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:39:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:39:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-30 06:39:57,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44759653270291566 [2023-08-30 06:39:57,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-30 06:39:57,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-30 06:39:57,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:57,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-30 06:39:57,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:57,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:57,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:57,453 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 290 flow. Second operand 3 states and 568 transitions. [2023-08-30 06:39:57,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 390 flow [2023-08-30 06:39:57,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 372 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 06:39:57,456 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 250 flow [2023-08-30 06:39:57,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-08-30 06:39:57,457 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-30 06:39:57,457 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 250 flow [2023-08-30 06:39:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:57,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:57,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:39:57,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:39:57,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:57,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:57,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1050807927, now seen corresponding path program 1 times [2023-08-30 06:39:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:57,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488615615] [2023-08-30 06:39:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:57,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:57,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:57,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:39:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 06:39:57,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:57,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:57,875 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 06:39:57,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2023-08-30 06:39:57,897 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:39:57,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:39:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:58,119 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 06:39:58,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 06:39:58,226 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 06:39:58,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:39:58,473 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 06:39:58,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:58,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488615615] [2023-08-30 06:39:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488615615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:39:58,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:39:58,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:39:58,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308189] [2023-08-30 06:39:58,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:39:58,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:39:58,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:39:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:40:01,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 06:40:01,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 250 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:01,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:01,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 06:40:01,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:06,677 INFO L130 PetriNetUnfolder]: 24555/31403 cut-off events. [2023-08-30 06:40:06,677 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 06:40:06,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62928 conditions, 31403 events. 24555/31403 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 2059. Compared 172480 event pairs, 11877 based on Foata normal form. 0/7857 useless extension candidates. Maximal degree in co-relation 62913. Up to 10341 conditions per place. [2023-08-30 06:40:06,885 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 203 selfloop transitions, 30 changer transitions 0/236 dead transitions. [2023-08-30 06:40:06,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 236 transitions, 1180 flow [2023-08-30 06:40:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:40:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:40:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2728 transitions. [2023-08-30 06:40:06,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030732860520095 [2023-08-30 06:40:06,894 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2728 transitions. [2023-08-30 06:40:06,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2728 transitions. [2023-08-30 06:40:06,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:06,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2728 transitions. [2023-08-30 06:40:06,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.5) internal successors, (2728), 16 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:06,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:06,913 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:06,914 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 250 flow. Second operand 16 states and 2728 transitions. [2023-08-30 06:40:06,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 236 transitions, 1180 flow [2023-08-30 06:40:06,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 236 transitions, 1179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:06,918 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 440 flow [2023-08-30 06:40:06,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=440, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-30 06:40:06,919 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2023-08-30 06:40:06,920 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 440 flow [2023-08-30 06:40:06,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:06,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:06,920 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:40:06,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:07,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:07,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:40:07,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1785490471, now seen corresponding path program 2 times [2023-08-30 06:40:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:07,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666652725] [2023-08-30 06:40:07,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:40:07,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:07,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:07,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:40:07,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:40:07,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:40:07,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:40:07,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:07,323 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:40:07,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:40:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:07,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:07,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:07,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666652725] [2023-08-30 06:40:07,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666652725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:07,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:07,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:40:07,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044197533] [2023-08-30 06:40:07,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:40:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:07,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:40:07,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:40:11,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 06:40:11,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 440 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:11,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:11,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 06:40:11,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:14,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:16,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:18,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:20,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:22,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:24,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:26,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:39,336 INFO L130 PetriNetUnfolder]: 77737/99406 cut-off events. [2023-08-30 06:40:39,336 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-08-30 06:40:39,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199164 conditions, 99406 events. 77737/99406 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 4691. Compared 600784 event pairs, 37610 based on Foata normal form. 15/24872 useless extension candidates. Maximal degree in co-relation 199146. Up to 15554 conditions per place. [2023-08-30 06:40:39,824 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 381 selfloop transitions, 53 changer transitions 0/437 dead transitions. [2023-08-30 06:40:39,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 437 transitions, 2413 flow [2023-08-30 06:40:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 06:40:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 06:40:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3163 transitions. [2023-08-30 06:40:39,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398553747740231 [2023-08-30 06:40:39,834 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3163 transitions. [2023-08-30 06:40:39,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3163 transitions. [2023-08-30 06:40:39,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:39,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3163 transitions. [2023-08-30 06:40:39,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 186.05882352941177) internal successors, (3163), 17 states have internal predecessors, (3163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:39,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 423.0) internal successors, (7614), 18 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 423.0) internal successors, (7614), 18 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:39,853 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 440 flow. Second operand 17 states and 3163 transitions. [2023-08-30 06:40:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 437 transitions, 2413 flow [2023-08-30 06:40:39,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 437 transitions, 2357 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-30 06:40:39,861 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 923 flow [2023-08-30 06:40:39,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=923, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2023-08-30 06:40:39,862 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2023-08-30 06:40:39,862 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 923 flow [2023-08-30 06:40:39,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:39,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:39,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:40:39,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:40,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:40,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:40:40,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash 509131622, now seen corresponding path program 1 times [2023-08-30 06:40:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535470880] [2023-08-30 06:40:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:40,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:40,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:40,075 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:40,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:40:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:40,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 06:40:40,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:40,302 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:40:40,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2023-08-30 06:40:40,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:40:40,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:40,490 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 06:40:40,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 06:40:40,654 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 06:40:40,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:40,930 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 06:40:40,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:40,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535470880] [2023-08-30 06:40:40,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535470880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:40,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:40,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:40:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049971315] [2023-08-30 06:40:40,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:40:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:40:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:40:42,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 06:40:42,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 157.75) internal successors, (1262), 8 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:42,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:42,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 06:40:42,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:54,735 INFO L130 PetriNetUnfolder]: 74543/95331 cut-off events. [2023-08-30 06:40:54,735 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-08-30 06:40:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191137 conditions, 95331 events. 74543/95331 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 572745 event pairs, 35993 based on Foata normal form. 0/24494 useless extension candidates. Maximal degree in co-relation 191111. Up to 44420 conditions per place. [2023-08-30 06:40:55,311 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 226 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2023-08-30 06:40:55,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 290 transitions, 1969 flow [2023-08-30 06:40:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:40:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:40:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2727 transitions. [2023-08-30 06:40:55,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029255319148936 [2023-08-30 06:40:55,319 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2727 transitions. [2023-08-30 06:40:55,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2727 transitions. [2023-08-30 06:40:55,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:55,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2727 transitions. [2023-08-30 06:40:55,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.4375) internal successors, (2727), 16 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:55,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:55,335 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:55,335 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 923 flow. Second operand 16 states and 2727 transitions. [2023-08-30 06:40:55,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 290 transitions, 1969 flow [2023-08-30 06:40:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 290 transitions, 1831 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-08-30 06:40:55,344 INFO L231 Difference]: Finished difference. Result has 116 places, 122 transitions, 996 flow [2023-08-30 06:40:55,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=996, PETRI_PLACES=116, PETRI_TRANSITIONS=122} [2023-08-30 06:40:55,345 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 56 predicate places. [2023-08-30 06:40:55,345 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 122 transitions, 996 flow [2023-08-30 06:40:55,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.75) internal successors, (1262), 8 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:55,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:55,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:40:55,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:55,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:55,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:40:55,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash 509131621, now seen corresponding path program 1 times [2023-08-30 06:40:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277097284] [2023-08-30 06:40:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:55,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:55,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:55,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:40:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:40:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:55,757 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:40:55,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 06:40:56,037 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:40:56,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:40:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:40:56,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:56,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:56,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277097284] [2023-08-30 06:40:56,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277097284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:56,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:56,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:56,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946407797] [2023-08-30 06:40:56,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:56,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:56,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:56,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-08-30 06:40:56,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 122 transitions, 996 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:56,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:56,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-08-30 06:40:56,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:06,106 INFO L130 PetriNetUnfolder]: 71306/90974 cut-off events. [2023-08-30 06:41:06,106 INFO L131 PetriNetUnfolder]: For 1715/1715 co-relation queries the response was YES. [2023-08-30 06:41:06,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182922 conditions, 90974 events. 71306/90974 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 4266. Compared 543602 event pairs, 34321 based on Foata normal form. 162/23262 useless extension candidates. Maximal degree in co-relation 182889. Up to 89902 conditions per place. [2023-08-30 06:41:06,789 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 116 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-08-30 06:41:06,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 120 transitions, 1226 flow [2023-08-30 06:41:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:41:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:41:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-30 06:41:06,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 06:41:06,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-30 06:41:06,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-30 06:41:06,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:06,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-30 06:41:06,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:06,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:06,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:06,796 INFO L175 Difference]: Start difference. First operand has 116 places, 122 transitions, 996 flow. Second operand 3 states and 564 transitions. [2023-08-30 06:41:06,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 120 transitions, 1226 flow [2023-08-30 06:41:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 1141 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 06:41:06,806 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 909 flow [2023-08-30 06:41:06,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=909, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2023-08-30 06:41:06,807 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2023-08-30 06:41:06,807 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 909 flow [2023-08-30 06:41:06,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:06,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:06,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:41:06,820 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 (10)] Ended with exit code 0 [2023-08-30 06:41:07,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:07,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:41:07,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794701, now seen corresponding path program 1 times [2023-08-30 06:41:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:07,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835898018] [2023-08-30 06:41:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:07,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:07,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:41:07,023 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 (11)] Waiting until timeout for monitored process [2023-08-30 06:41:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:41:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:07,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:41:07,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:41:07,374 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:41:07,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:41:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:07,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:41:07,522 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:41:07,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:41:07,620 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 06:41:07,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:41:09,989 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 06:41:09,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835898018] [2023-08-30 06:41:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835898018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:41:09,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:41:09,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:41:09,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352887858] [2023-08-30 06:41:09,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:41:09,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:41:09,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:41:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:41:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 423 [2023-08-30 06:41:12,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 909 flow. Second operand has 10 states, 10 states have (on average 151.6) internal successors, (1516), 10 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:12,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:12,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 423 [2023-08-30 06:41:12,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:39,595 INFO L130 PetriNetUnfolder]: 131082/170406 cut-off events. [2023-08-30 06:41:39,595 INFO L131 PetriNetUnfolder]: For 2337/2337 co-relation queries the response was YES. [2023-08-30 06:41:40,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342979 conditions, 170406 events. 131082/170406 cut-off events. For 2337/2337 co-relation queries the response was YES. Maximal size of possible extension queue 8210. Compared 1144991 event pairs, 36264 based on Foata normal form. 0/49310 useless extension candidates. Maximal degree in co-relation 342946. Up to 22194 conditions per place. [2023-08-30 06:41:41,041 INFO L137 encePairwiseOnDemand]: 410/423 looper letters, 633 selfloop transitions, 93 changer transitions 0/728 dead transitions. [2023-08-30 06:41:41,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 728 transitions, 3865 flow [2023-08-30 06:41:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 06:41:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 06:41:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5328 transitions. [2023-08-30 06:41:41,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40631434454358273 [2023-08-30 06:41:41,055 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5328 transitions. [2023-08-30 06:41:41,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5328 transitions. [2023-08-30 06:41:41,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:41,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5328 transitions. [2023-08-30 06:41:41,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 171.8709677419355) internal successors, (5328), 31 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:41,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:41,092 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:41,093 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 909 flow. Second operand 31 states and 5328 transitions. [2023-08-30 06:41:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 728 transitions, 3865 flow [2023-08-30 06:41:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 728 transitions, 3864 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:41:41,109 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1268 flow [2023-08-30 06:41:41,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1268, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2023-08-30 06:41:41,110 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2023-08-30 06:41:41,111 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1268 flow [2023-08-30 06:41:41,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.6) internal successors, (1516), 10 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:41,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:41,112 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 06:41:41,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:41:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:41,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:41:41,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2130707981, now seen corresponding path program 2 times [2023-08-30 06:41:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684531993] [2023-08-30 06:41:41,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:41:41,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:41,325 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:41:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:41:41,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:41:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:41:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:41:41,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:41,529 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:41:41,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:41:41,555 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:41:41,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:41:41,692 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 06:41:41,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:41:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 06:41:41,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:41,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684531993] [2023-08-30 06:41:41,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684531993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:41,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:41,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:41:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183355042] [2023-08-30 06:41:41,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:41:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:41:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:41:43,856 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 06:41:44,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 423 [2023-08-30 06:41:44,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1268 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:44,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:44,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 423 [2023-08-30 06:41:44,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:01,754 INFO L130 PetriNetUnfolder]: 121775/158804 cut-off events. [2023-08-30 06:42:01,754 INFO L131 PetriNetUnfolder]: For 134040/139351 co-relation queries the response was YES. [2023-08-30 06:42:02,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388198 conditions, 158804 events. 121775/158804 cut-off events. For 134040/139351 co-relation queries the response was YES. Maximal size of possible extension queue 7655. Compared 1080968 event pairs, 65883 based on Foata normal form. 4248/57155 useless extension candidates. Maximal degree in co-relation 388158. Up to 156985 conditions per place. [2023-08-30 06:42:03,230 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 133 selfloop transitions, 11 changer transitions 0/155 dead transitions. [2023-08-30 06:42:03,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 155 transitions, 1440 flow [2023-08-30 06:42:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:42:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:42:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 719 transitions. [2023-08-30 06:42:03,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42494089834515364 [2023-08-30 06:42:03,233 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 719 transitions. [2023-08-30 06:42:03,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 719 transitions. [2023-08-30 06:42:03,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:03,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 719 transitions. [2023-08-30 06:42:03,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:03,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:03,237 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:03,237 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1268 flow. Second operand 4 states and 719 transitions. [2023-08-30 06:42:03,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 155 transitions, 1440 flow [2023-08-30 06:42:03,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 155 transitions, 1328 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-30 06:42:03,751 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1062 flow [2023-08-30 06:42:03,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1062, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-08-30 06:42:03,752 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 72 predicate places. [2023-08-30 06:42:03,752 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1062 flow [2023-08-30 06:42:03,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:03,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:03,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:03,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:42:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:03,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:03,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794702, now seen corresponding path program 1 times [2023-08-30 06:42:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958675084] [2023-08-30 06:42:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:03,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:03,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:42:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:42:04,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:04,136 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:42:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:42:04,169 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:42:04,169 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:42:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:42:04,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:04,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958675084] [2023-08-30 06:42:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958675084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:42:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358219947] [2023-08-30 06:42:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:04,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:04,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 423 [2023-08-30 06:42:04,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1062 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:04,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:04,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 423 [2023-08-30 06:42:04,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:15,945 INFO L130 PetriNetUnfolder]: 75581/99551 cut-off events. [2023-08-30 06:42:15,945 INFO L131 PetriNetUnfolder]: For 101065/105071 co-relation queries the response was YES. [2023-08-30 06:42:16,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252805 conditions, 99551 events. 75581/99551 cut-off events. For 101065/105071 co-relation queries the response was YES. Maximal size of possible extension queue 4796. Compared 661481 event pairs, 40056 based on Foata normal form. 3204/41084 useless extension candidates. Maximal degree in co-relation 252768. Up to 98260 conditions per place. [2023-08-30 06:42:16,815 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 130 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2023-08-30 06:42:16,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 152 transitions, 1338 flow [2023-08-30 06:42:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:42:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:42:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 702 transitions. [2023-08-30 06:42:16,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148936170212766 [2023-08-30 06:42:16,817 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 702 transitions. [2023-08-30 06:42:16,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 702 transitions. [2023-08-30 06:42:16,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:16,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 702 transitions. [2023-08-30 06:42:16,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:16,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:16,820 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:16,820 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1062 flow. Second operand 4 states and 702 transitions. [2023-08-30 06:42:16,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 152 transitions, 1338 flow [2023-08-30 06:42:16,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 152 transitions, 1326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:42:16,994 INFO L231 Difference]: Finished difference. Result has 130 places, 152 transitions, 1066 flow [2023-08-30 06:42:16,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1066, PETRI_PLACES=130, PETRI_TRANSITIONS=152} [2023-08-30 06:42:16,995 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 70 predicate places. [2023-08-30 06:42:16,995 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 152 transitions, 1066 flow [2023-08-30 06:42:16,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:16,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:16,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:17,004 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 06:42:17,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:17,197 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:17,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794699, now seen corresponding path program 1 times [2023-08-30 06:42:17,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:17,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58784396] [2023-08-30 06:42:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:17,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:17,199 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:17,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:42:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:42:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:17,342 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 06:42:17,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:42:17,479 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 06:42:17,539 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 06:42:17,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:17,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58784396] [2023-08-30 06:42:17,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58784396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:42:17,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:42:17,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 06:42:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616328935] [2023-08-30 06:42:17,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:42:17,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:42:17,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:42:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:42:19,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 06:42:19,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 152 transitions, 1066 flow. Second operand has 10 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:19,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:19,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 06:42:19,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:34,016 INFO L130 PetriNetUnfolder]: 96197/126359 cut-off events. [2023-08-30 06:42:34,016 INFO L131 PetriNetUnfolder]: For 63740/63740 co-relation queries the response was YES. [2023-08-30 06:42:34,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309692 conditions, 126359 events. 96197/126359 cut-off events. For 63740/63740 co-relation queries the response was YES. Maximal size of possible extension queue 5797. Compared 851343 event pairs, 31503 based on Foata normal form. 0/49868 useless extension candidates. Maximal degree in co-relation 309655. Up to 67781 conditions per place. [2023-08-30 06:42:35,158 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 173 selfloop transitions, 66 changer transitions 0/241 dead transitions. [2023-08-30 06:42:35,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 241 transitions, 1862 flow [2023-08-30 06:42:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:42:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:42:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1599 transitions. [2023-08-30 06:42:35,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42001576044129235 [2023-08-30 06:42:35,160 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1599 transitions. [2023-08-30 06:42:35,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1599 transitions. [2023-08-30 06:42:35,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:35,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1599 transitions. [2023-08-30 06:42:35,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.66666666666666) internal successors, (1599), 9 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:35,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:35,165 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:35,165 INFO L175 Difference]: Start difference. First operand has 130 places, 152 transitions, 1066 flow. Second operand 9 states and 1599 transitions. [2023-08-30 06:42:35,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 241 transitions, 1862 flow [2023-08-30 06:42:35,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 241 transitions, 1850 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:42:35,506 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 1229 flow [2023-08-30 06:42:35,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2023-08-30 06:42:35,506 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 78 predicate places. [2023-08-30 06:42:35,506 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 1229 flow [2023-08-30 06:42:35,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:35,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:35,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:35,514 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 06:42:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:35,710 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:35,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794700, now seen corresponding path program 1 times [2023-08-30 06:42:35,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:35,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771859317] [2023-08-30 06:42:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:35,711 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 06:42:35,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:35,712 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:35,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:42:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:36,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:42:36,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:42:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:42:36,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:36,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771859317] [2023-08-30 06:42:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771859317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:36,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:36,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:42:36,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206167704] [2023-08-30 06:42:36,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:36,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:36,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:36,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-08-30 06:42:36,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 1229 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:36,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:36,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-08-30 06:42:36,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:43,594 INFO L130 PetriNetUnfolder]: 45415/61789 cut-off events. [2023-08-30 06:42:43,595 INFO L131 PetriNetUnfolder]: For 224004/230924 co-relation queries the response was YES. [2023-08-30 06:42:43,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165477 conditions, 61789 events. 45415/61789 cut-off events. For 224004/230924 co-relation queries the response was YES. Maximal size of possible extension queue 3026. Compared 418776 event pairs, 25200 based on Foata normal form. 8126/38149 useless extension candidates. Maximal degree in co-relation 165438. Up to 60828 conditions per place. [2023-08-30 06:42:44,167 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 90 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2023-08-30 06:42:44,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 132 transitions, 1404 flow [2023-08-30 06:42:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:42:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:42:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2023-08-30 06:42:44,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42021276595744683 [2023-08-30 06:42:44,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2023-08-30 06:42:44,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2023-08-30 06:42:44,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:44,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2023-08-30 06:42:44,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:44,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:44,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:44,172 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 1229 flow. Second operand 4 states and 711 transitions. [2023-08-30 06:42:44,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 132 transitions, 1404 flow [2023-08-30 06:42:44,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 1361 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 06:42:44,359 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 1181 flow [2023-08-30 06:42:44,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1181, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2023-08-30 06:42:44,360 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2023-08-30 06:42:44,360 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 1181 flow [2023-08-30 06:42:44,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:44,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:44,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:44,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:42:44,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:44,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:44,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash -350958929, now seen corresponding path program 1 times [2023-08-30 06:42:44,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:44,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760450615] [2023-08-30 06:42:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:44,564 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:44,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:42:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:42:44,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:44,766 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 06:42:44,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:42:44,869 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 06:42:44,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760450615] [2023-08-30 06:42:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760450615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:42:44,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:42:44,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:42:44,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598877733] [2023-08-30 06:42:44,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:42:44,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:42:44,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:42:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:42:45,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 423 [2023-08-30 06:42:45,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 1181 flow. Second operand has 12 states, 12 states have (on average 164.5) internal successors, (1974), 12 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:45,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:45,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 423 [2023-08-30 06:42:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:52,306 INFO L130 PetriNetUnfolder]: 36454/48682 cut-off events. [2023-08-30 06:42:52,306 INFO L131 PetriNetUnfolder]: For 76998/76998 co-relation queries the response was YES. [2023-08-30 06:42:52,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130455 conditions, 48682 events. 36454/48682 cut-off events. For 76998/76998 co-relation queries the response was YES. Maximal size of possible extension queue 2213. Compared 304800 event pairs, 11128 based on Foata normal form. 869/24828 useless extension candidates. Maximal degree in co-relation 130417. Up to 25524 conditions per place. [2023-08-30 06:42:52,716 INFO L137 encePairwiseOnDemand]: 411/423 looper letters, 139 selfloop transitions, 48 changer transitions 0/189 dead transitions. [2023-08-30 06:42:52,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 1577 flow [2023-08-30 06:42:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:42:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:42:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1920 transitions. [2023-08-30 06:42:52,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126370083816892 [2023-08-30 06:42:52,720 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1920 transitions. [2023-08-30 06:42:52,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1920 transitions. [2023-08-30 06:42:52,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:52,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1920 transitions. [2023-08-30 06:42:52,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.54545454545453) internal successors, (1920), 11 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:52,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:52,726 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:52,726 INFO L175 Difference]: Start difference. First operand has 135 places, 132 transitions, 1181 flow. Second operand 11 states and 1920 transitions. [2023-08-30 06:42:52,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 1577 flow [2023-08-30 06:42:53,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1510 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-30 06:42:53,352 INFO L231 Difference]: Finished difference. Result has 129 places, 111 transitions, 1044 flow [2023-08-30 06:42:53,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1044, PETRI_PLACES=129, PETRI_TRANSITIONS=111} [2023-08-30 06:42:53,352 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2023-08-30 06:42:53,353 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 111 transitions, 1044 flow [2023-08-30 06:42:53,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.5) internal successors, (1974), 12 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:53,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:53,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:53,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:42:53,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:53,554 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:53,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:53,555 INFO L85 PathProgramCache]: Analyzing trace with hash -350754530, now seen corresponding path program 1 times [2023-08-30 06:42:53,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:53,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118208560] [2023-08-30 06:42:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:53,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:53,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:53,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:42:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:53,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:42:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:53,732 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:42:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 06:42:53,761 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:42:53,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:42:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:42:53,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:53,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:53,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118208560] [2023-08-30 06:42:53,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118208560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:53,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:42:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129177956] [2023-08-30 06:42:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:53,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:42:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:42:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:42:53,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-30 06:42:53,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 111 transitions, 1044 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:53,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:53,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-30 06:42:53,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:58,628 INFO L130 PetriNetUnfolder]: 28771/38896 cut-off events. [2023-08-30 06:42:58,628 INFO L131 PetriNetUnfolder]: For 105225/109127 co-relation queries the response was YES. [2023-08-30 06:42:58,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105227 conditions, 38896 events. 28771/38896 cut-off events. For 105225/109127 co-relation queries the response was YES. Maximal size of possible extension queue 1903. Compared 247013 event pairs, 15841 based on Foata normal form. 3430/22462 useless extension candidates. Maximal degree in co-relation 105190. Up to 38395 conditions per place. [2023-08-30 06:42:58,957 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 99 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-30 06:42:58,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 109 transitions, 1240 flow [2023-08-30 06:42:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:42:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:42:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-08-30 06:42:58,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2023-08-30 06:42:58,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-08-30 06:42:58,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-08-30 06:42:58,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:58,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-08-30 06:42:58,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:58,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:58,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:58,961 INFO L175 Difference]: Start difference. First operand has 129 places, 111 transitions, 1044 flow. Second operand 3 states and 549 transitions. [2023-08-30 06:42:58,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 109 transitions, 1240 flow [2023-08-30 06:42:58,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 109 transitions, 1219 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:42:59,001 INFO L231 Difference]: Finished difference. Result has 126 places, 109 transitions, 1021 flow [2023-08-30 06:42:59,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=126, PETRI_TRANSITIONS=109} [2023-08-30 06:42:59,001 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2023-08-30 06:42:59,002 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 109 transitions, 1021 flow [2023-08-30 06:42:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:59,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:59,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:59,015 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 (17)] Ended with exit code 0 [2023-08-30 06:42:59,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:59,213 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:59,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:59,213 INFO L85 PathProgramCache]: Analyzing trace with hash -350754531, now seen corresponding path program 1 times [2023-08-30 06:42:59,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:59,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911732464] [2023-08-30 06:42:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:59,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:59,214 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:59,215 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 (18)] Waiting until timeout for monitored process [2023-08-30 06:42:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:42:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:59,440 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2023-08-30 06:42:59,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 40 [2023-08-30 06:42:59,457 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 167 treesize of output 163 [2023-08-30 06:42:59,624 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 06:42:59,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 06:42:59,811 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 06:42:59,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:00,132 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 06:43:00,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911732464] [2023-08-30 06:43:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911732464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:00,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:43:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357031343] [2023-08-30 06:43:00,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:00,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:43:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:00,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:43:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:43:01,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 06:43:01,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 109 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 158.25) internal successors, (1266), 8 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:01,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:01,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 06:43:02,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:08,108 INFO L130 PetriNetUnfolder]: 26984/36644 cut-off events. [2023-08-30 06:43:08,108 INFO L131 PetriNetUnfolder]: For 100224/103930 co-relation queries the response was YES. [2023-08-30 06:43:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99580 conditions, 36644 events. 26984/36644 cut-off events. For 100224/103930 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 232087 event pairs, 14000 based on Foata normal form. 3232/22101 useless extension candidates. Maximal degree in co-relation 99542. Up to 31271 conditions per place. [2023-08-30 06:43:08,451 INFO L137 encePairwiseOnDemand]: 413/423 looper letters, 119 selfloop transitions, 44 changer transitions 0/172 dead transitions. [2023-08-30 06:43:08,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 172 transitions, 1594 flow [2023-08-30 06:43:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:43:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:43:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2299 transitions. [2023-08-30 06:43:08,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38821344140493075 [2023-08-30 06:43:08,455 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2299 transitions. [2023-08-30 06:43:08,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2299 transitions. [2023-08-30 06:43:08,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:08,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2299 transitions. [2023-08-30 06:43:08,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.21428571428572) internal successors, (2299), 14 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:08,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:08,460 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:08,460 INFO L175 Difference]: Start difference. First operand has 126 places, 109 transitions, 1021 flow. Second operand 14 states and 2299 transitions. [2023-08-30 06:43:08,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 172 transitions, 1594 flow [2023-08-30 06:43:08,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 172 transitions, 1593 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:08,497 INFO L231 Difference]: Finished difference. Result has 141 places, 109 transitions, 1153 flow [2023-08-30 06:43:08,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1153, PETRI_PLACES=141, PETRI_TRANSITIONS=109} [2023-08-30 06:43:08,498 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 81 predicate places. [2023-08-30 06:43:08,498 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 109 transitions, 1153 flow [2023-08-30 06:43:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.25) internal successors, (1266), 8 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:08,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:08,498 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:08,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:08,705 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:43:08,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1089002116, now seen corresponding path program 2 times [2023-08-30 06:43:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407155756] [2023-08-30 06:43:08,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:43:08,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:08,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:08,707 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:43:08,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:43:08,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:43:08,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:43:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:43:08,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:08,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:08,893 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 06:43:08,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 06:43:08,907 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 42 treesize of output 38 [2023-08-30 06:43:09,237 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 06:43:09,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:43:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 06:43:09,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:09,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407155756] [2023-08-30 06:43:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407155756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:09,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:09,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:43:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700874222] [2023-08-30 06:43:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:43:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:43:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:43:11,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:43:13,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:43:14,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 423 [2023-08-30 06:43:14,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 109 transitions, 1153 flow. Second operand has 5 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:14,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:14,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 423 [2023-08-30 06:43:14,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:18,939 INFO L130 PetriNetUnfolder]: 27501/37101 cut-off events. [2023-08-30 06:43:18,940 INFO L131 PetriNetUnfolder]: For 101985/105675 co-relation queries the response was YES. [2023-08-30 06:43:19,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101688 conditions, 37101 events. 27501/37101 cut-off events. For 101985/105675 co-relation queries the response was YES. Maximal size of possible extension queue 1884. Compared 233946 event pairs, 15143 based on Foata normal form. 3278/21938 useless extension candidates. Maximal degree in co-relation 101645. Up to 36506 conditions per place. [2023-08-30 06:43:19,270 INFO L137 encePairwiseOnDemand]: 419/423 looper letters, 67 selfloop transitions, 32 changer transitions 0/108 dead transitions. [2023-08-30 06:43:19,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 108 transitions, 1343 flow [2023-08-30 06:43:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:43:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:43:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 868 transitions. [2023-08-30 06:43:19,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41040189125295506 [2023-08-30 06:43:19,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 868 transitions. [2023-08-30 06:43:19,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 868 transitions. [2023-08-30 06:43:19,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:19,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 868 transitions. [2023-08-30 06:43:19,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:19,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:19,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:19,274 INFO L175 Difference]: Start difference. First operand has 141 places, 109 transitions, 1153 flow. Second operand 5 states and 868 transitions. [2023-08-30 06:43:19,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 108 transitions, 1343 flow [2023-08-30 06:43:19,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 108 transitions, 1245 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-30 06:43:19,315 INFO L231 Difference]: Finished difference. Result has 133 places, 108 transitions, 1111 flow [2023-08-30 06:43:19,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1111, PETRI_PLACES=133, PETRI_TRANSITIONS=108} [2023-08-30 06:43:19,315 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2023-08-30 06:43:19,316 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 108 transitions, 1111 flow [2023-08-30 06:43:19,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:19,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:19,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:19,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:19,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:19,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:43:19,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2011505704, now seen corresponding path program 1 times [2023-08-30 06:43:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933772191] [2023-08-30 06:43:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:19,519 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:43:19,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:43:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:43:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:19,707 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 06:43:19,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:19,919 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 06:43:19,981 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 06:43:19,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:19,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933772191] [2023-08-30 06:43:19,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933772191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:19,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:19,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 06:43:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649501265] [2023-08-30 06:43:19,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:43:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:43:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:43:21,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 06:43:21,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 108 transitions, 1111 flow. Second operand has 10 states, 10 states have (on average 163.8) internal successors, (1638), 10 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:21,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:21,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 06:43:21,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:29,772 INFO L130 PetriNetUnfolder]: 39659/55001 cut-off events. [2023-08-30 06:43:29,772 INFO L131 PetriNetUnfolder]: For 175031/181447 co-relation queries the response was YES. [2023-08-30 06:43:30,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157257 conditions, 55001 events. 39659/55001 cut-off events. For 175031/181447 co-relation queries the response was YES. Maximal size of possible extension queue 2795. Compared 385444 event pairs, 15845 based on Foata normal form. 5598/37404 useless extension candidates. Maximal degree in co-relation 157217. Up to 30918 conditions per place. [2023-08-30 06:43:30,299 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 129 selfloop transitions, 43 changer transitions 0/180 dead transitions. [2023-08-30 06:43:30,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 180 transitions, 1750 flow [2023-08-30 06:43:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:43:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:43:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1563 transitions. [2023-08-30 06:43:30,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105594956658786 [2023-08-30 06:43:30,302 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1563 transitions. [2023-08-30 06:43:30,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1563 transitions. [2023-08-30 06:43:30,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:30,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1563 transitions. [2023-08-30 06:43:30,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.66666666666666) internal successors, (1563), 9 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:30,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:30,306 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:30,306 INFO L175 Difference]: Start difference. First operand has 133 places, 108 transitions, 1111 flow. Second operand 9 states and 1563 transitions. [2023-08-30 06:43:30,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 180 transitions, 1750 flow [2023-08-30 06:43:30,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 180 transitions, 1707 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:43:30,383 INFO L231 Difference]: Finished difference. Result has 140 places, 111 transitions, 1172 flow [2023-08-30 06:43:30,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1172, PETRI_PLACES=140, PETRI_TRANSITIONS=111} [2023-08-30 06:43:30,383 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2023-08-30 06:43:30,383 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 111 transitions, 1172 flow [2023-08-30 06:43:30,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.8) internal successors, (1638), 10 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:30,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:30,392 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 06:43:30,584 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 06:43:30,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:43:30,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2011505702, now seen corresponding path program 1 times [2023-08-30 06:43:30,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:30,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614084122] [2023-08-30 06:43:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:30,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:30,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:30,586 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 06:43:30,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:43:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:43:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:30,783 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 06:43:30,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:30,961 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 06:43:30,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:30,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614084122] [2023-08-30 06:43:30,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614084122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:30,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:30,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:43:30,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950383418] [2023-08-30 06:43:30,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:30,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:43:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:43:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:43:31,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 423 [2023-08-30 06:43:31,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 111 transitions, 1172 flow. Second operand has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:31,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:31,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 423 [2023-08-30 06:43:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:39,059 INFO L130 PetriNetUnfolder]: 35926/50482 cut-off events. [2023-08-30 06:43:39,059 INFO L131 PetriNetUnfolder]: For 170498/176156 co-relation queries the response was YES. [2023-08-30 06:43:39,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155856 conditions, 50482 events. 35926/50482 cut-off events. For 170498/176156 co-relation queries the response was YES. Maximal size of possible extension queue 2733. Compared 357942 event pairs, 17152 based on Foata normal form. 5014/37905 useless extension candidates. Maximal degree in co-relation 155814. Up to 34388 conditions per place. [2023-08-30 06:43:39,576 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 112 selfloop transitions, 44 changer transitions 0/164 dead transitions. [2023-08-30 06:43:39,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 164 transitions, 1734 flow [2023-08-30 06:43:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:43:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:43:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1861 transitions. [2023-08-30 06:43:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39995701697829356 [2023-08-30 06:43:39,579 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1861 transitions. [2023-08-30 06:43:39,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1861 transitions. [2023-08-30 06:43:39,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:39,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1861 transitions. [2023-08-30 06:43:39,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 169.1818181818182) internal successors, (1861), 11 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:39,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:39,583 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:39,583 INFO L175 Difference]: Start difference. First operand has 140 places, 111 transitions, 1172 flow. Second operand 11 states and 1861 transitions. [2023-08-30 06:43:39,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 164 transitions, 1734 flow [2023-08-30 06:43:39,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 164 transitions, 1677 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:43:39,704 INFO L231 Difference]: Finished difference. Result has 148 places, 111 transitions, 1224 flow [2023-08-30 06:43:39,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1224, PETRI_PLACES=148, PETRI_TRANSITIONS=111} [2023-08-30 06:43:39,705 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2023-08-30 06:43:39,705 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 111 transitions, 1224 flow [2023-08-30 06:43:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:39,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:39,706 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:39,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-30 06:43:39,906 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 06:43:39,906 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:43:39,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash 600666973, now seen corresponding path program 2 times [2023-08-30 06:43:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:39,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881981128] [2023-08-30 06:43:39,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:43:39,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:39,908 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 06:43:39,914 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 06:43:39,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:43:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:43:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:43:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:40,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:43:40,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:43:40,217 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:43:40,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:43:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:40,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:43:40,528 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:43:40,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:43:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 06:43:40,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:40,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:40,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881981128] [2023-08-30 06:43:40,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881981128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:40,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:43:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726953333] [2023-08-30 06:43:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:40,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:43:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:43:40,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:43:41,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-08-30 06:43:41,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 111 transitions, 1224 flow. Second operand has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:41,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:41,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-08-30 06:43:41,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:46,767 INFO L130 PetriNetUnfolder]: 27706/38296 cut-off events. [2023-08-30 06:43:46,767 INFO L131 PetriNetUnfolder]: For 83671/85267 co-relation queries the response was YES. [2023-08-30 06:43:47,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128736 conditions, 38296 events. 27706/38296 cut-off events. For 83671/85267 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 255322 event pairs, 6466 based on Foata normal form. 3798/30793 useless extension candidates. Maximal degree in co-relation 128692. Up to 32436 conditions per place. [2023-08-30 06:43:47,169 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 99 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2023-08-30 06:43:47,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 129 transitions, 1549 flow [2023-08-30 06:43:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:43:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:43:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1011 transitions. [2023-08-30 06:43:47,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983451536643026 [2023-08-30 06:43:47,171 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1011 transitions. [2023-08-30 06:43:47,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1011 transitions. [2023-08-30 06:43:47,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:47,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1011 transitions. [2023-08-30 06:43:47,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.5) internal successors, (1011), 6 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,175 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,175 INFO L175 Difference]: Start difference. First operand has 148 places, 111 transitions, 1224 flow. Second operand 6 states and 1011 transitions. [2023-08-30 06:43:47,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 129 transitions, 1549 flow [2023-08-30 06:43:47,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 129 transitions, 1457 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-30 06:43:47,363 INFO L231 Difference]: Finished difference. Result has 147 places, 111 transitions, 1203 flow [2023-08-30 06:43:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1203, PETRI_PLACES=147, PETRI_TRANSITIONS=111} [2023-08-30 06:43:47,364 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2023-08-30 06:43:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 111 transitions, 1203 flow [2023-08-30 06:43:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:47,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:47,372 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 06:43:47,565 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 06:43:47,565 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:43:47,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:47,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1556034157, now seen corresponding path program 2 times [2023-08-30 06:43:47,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:47,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182632865] [2023-08-30 06:43:47,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:43:47,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:47,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:47,567 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 06:43:47,568 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 (23)] Waiting until timeout for monitored process [2023-08-30 06:43:47,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:43:47,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:43:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:43:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:47,802 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 06:43:47,802 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 42 [2023-08-30 06:43:47,875 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:43:47,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:43:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:47,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:43:47,972 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:43:47,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:43:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:43:48,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:43:48,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:48,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182632865] [2023-08-30 06:43:48,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182632865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:48,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:48,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:43:48,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693264072] [2023-08-30 06:43:48,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:48,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:43:48,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:43:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:43:54,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:43:55,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-08-30 06:43:55,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 111 transitions, 1203 flow. Second operand has 14 states, 14 states have (on average 155.42857142857142) internal successors, (2176), 14 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:55,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:55,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-08-30 06:43:55,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:05,429 INFO L130 PetriNetUnfolder]: 42941/59330 cut-off events. [2023-08-30 06:44:05,430 INFO L131 PetriNetUnfolder]: For 126503/128891 co-relation queries the response was YES. [2023-08-30 06:44:05,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201351 conditions, 59330 events. 42941/59330 cut-off events. For 126503/128891 co-relation queries the response was YES. Maximal size of possible extension queue 3049. Compared 414197 event pairs, 5435 based on Foata normal form. 3820/45677 useless extension candidates. Maximal degree in co-relation 201306. Up to 25684 conditions per place. [2023-08-30 06:44:06,026 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 194 selfloop transitions, 34 changer transitions 0/231 dead transitions. [2023-08-30 06:44:06,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 231 transitions, 2091 flow [2023-08-30 06:44:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:44:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:44:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2156 transitions. [2023-08-30 06:44:06,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39207128568830696 [2023-08-30 06:44:06,029 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2156 transitions. [2023-08-30 06:44:06,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2156 transitions. [2023-08-30 06:44:06,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:06,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2156 transitions. [2023-08-30 06:44:06,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.84615384615384) internal successors, (2156), 13 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:06,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:06,035 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:06,035 INFO L175 Difference]: Start difference. First operand has 147 places, 111 transitions, 1203 flow. Second operand 13 states and 2156 transitions. [2023-08-30 06:44:06,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 231 transitions, 2091 flow [2023-08-30 06:44:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 231 transitions, 2048 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:06,160 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 1293 flow [2023-08-30 06:44:06,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1293, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2023-08-30 06:44:06,161 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 97 predicate places. [2023-08-30 06:44:06,161 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 1293 flow [2023-08-30 06:44:06,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 155.42857142857142) internal successors, (2176), 14 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:06,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:06,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:06,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:06,362 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 06:44:06,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:44:06,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1556034155, now seen corresponding path program 1 times [2023-08-30 06:44:06,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:06,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539468022] [2023-08-30 06:44:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:06,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:06,365 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 06:44:06,365 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 06:44:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:44:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:44:06,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:06,839 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 27 treesize of output 23 [2023-08-30 06:44:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:44:06,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539468022] [2023-08-30 06:44:06,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539468022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:06,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:06,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 06:44:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675680836] [2023-08-30 06:44:06,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:44:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:44:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:44:10,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 06:44:10,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 1293 flow. Second operand has 14 states, 14 states have (on average 163.28571428571428) internal successors, (2286), 14 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:10,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:10,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 06:44:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:19,509 INFO L130 PetriNetUnfolder]: 37947/52919 cut-off events. [2023-08-30 06:44:19,509 INFO L131 PetriNetUnfolder]: For 172063/174192 co-relation queries the response was YES. [2023-08-30 06:44:19,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191855 conditions, 52919 events. 37947/52919 cut-off events. For 172063/174192 co-relation queries the response was YES. Maximal size of possible extension queue 2654. Compared 368594 event pairs, 13976 based on Foata normal form. 3561/41011 useless extension candidates. Maximal degree in co-relation 191808. Up to 22712 conditions per place. [2023-08-30 06:44:20,097 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 255 selfloop transitions, 57 changer transitions 0/315 dead transitions. [2023-08-30 06:44:20,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 315 transitions, 2782 flow [2023-08-30 06:44:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:44:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:44:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2825 transitions. [2023-08-30 06:44:20,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174054373522459 [2023-08-30 06:44:20,101 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2825 transitions. [2023-08-30 06:44:20,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2825 transitions. [2023-08-30 06:44:20,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:20,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2825 transitions. [2023-08-30 06:44:20,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 176.5625) internal successors, (2825), 16 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,110 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,110 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 1293 flow. Second operand 16 states and 2825 transitions. [2023-08-30 06:44:20,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 315 transitions, 2782 flow [2023-08-30 06:44:22,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 315 transitions, 2671 flow, removed 22 selfloop flow, removed 8 redundant places. [2023-08-30 06:44:22,214 INFO L231 Difference]: Finished difference. Result has 164 places, 119 transitions, 1363 flow [2023-08-30 06:44:22,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1363, PETRI_PLACES=164, PETRI_TRANSITIONS=119} [2023-08-30 06:44:22,215 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2023-08-30 06:44:22,215 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 119 transitions, 1363 flow [2023-08-30 06:44:22,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.28571428571428) internal successors, (2286), 14 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:22,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:22,216 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1] [2023-08-30 06:44:22,225 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 06:44:22,419 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 06:44:22,419 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:44:22,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1563140197, now seen corresponding path program 1 times [2023-08-30 06:44:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:22,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124994912] [2023-08-30 06:44:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:22,420 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 06:44:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:22,421 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 06:44:22,422 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 06:44:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:22,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:44:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:44:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:44:22,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:23,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124994912] [2023-08-30 06:44:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124994912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:23,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:23,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2023-08-30 06:44:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342009728] [2023-08-30 06:44:23,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 06:44:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 06:44:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-08-30 06:44:32,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 06:44:32,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 119 transitions, 1363 flow. Second operand has 19 states, 19 states have (on average 157.10526315789474) internal successors, (2985), 19 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:32,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:32,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 06:44:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:47,820 INFO L130 PetriNetUnfolder]: 34519/48911 cut-off events. [2023-08-30 06:44:47,820 INFO L131 PetriNetUnfolder]: For 224697/233976 co-relation queries the response was YES. [2023-08-30 06:44:48,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169209 conditions, 48911 events. 34519/48911 cut-off events. For 224697/233976 co-relation queries the response was YES. Maximal size of possible extension queue 2538. Compared 346116 event pairs, 23764 based on Foata normal form. 8600/43463 useless extension candidates. Maximal degree in co-relation 169163. Up to 25293 conditions per place. [2023-08-30 06:44:48,547 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 358 selfloop transitions, 37 changer transitions 0/407 dead transitions. [2023-08-30 06:44:48,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 407 transitions, 3462 flow [2023-08-30 06:44:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 06:44:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 06:44:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3925 transitions. [2023-08-30 06:44:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40343303525542196 [2023-08-30 06:44:48,553 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3925 transitions. [2023-08-30 06:44:48,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3925 transitions. [2023-08-30 06:44:48,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:48,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3925 transitions. [2023-08-30 06:44:48,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 170.65217391304347) internal successors, (3925), 23 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:48,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 423.0) internal successors, (10152), 24 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:48,565 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 423.0) internal successors, (10152), 24 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:48,565 INFO L175 Difference]: Start difference. First operand has 164 places, 119 transitions, 1363 flow. Second operand 23 states and 3925 transitions. [2023-08-30 06:44:48,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 407 transitions, 3462 flow [2023-08-30 06:44:48,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 407 transitions, 3264 flow, removed 9 selfloop flow, removed 11 redundant places. [2023-08-30 06:44:48,741 INFO L231 Difference]: Finished difference. Result has 178 places, 125 transitions, 1335 flow [2023-08-30 06:44:48,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1335, PETRI_PLACES=178, PETRI_TRANSITIONS=125} [2023-08-30 06:44:48,742 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 118 predicate places. [2023-08-30 06:44:48,742 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 125 transitions, 1335 flow [2023-08-30 06:44:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 157.10526315789474) internal successors, (2985), 19 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:48,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:48,743 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:44:48,751 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 06:44:48,943 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 06:44:48,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:44:48,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -876557415, now seen corresponding path program 3 times [2023-08-30 06:44:48,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:48,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437209325] [2023-08-30 06:44:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:44:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:48,945 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 06:44:48,947 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 06:44:49,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:44:49,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:44:49,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:44:49,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:49,210 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:49,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:49,513 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 06:44:49,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:51,466 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 06:44:51,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:51,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437209325] [2023-08-30 06:44:51,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437209325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:51,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:51,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:44:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971083493] [2023-08-30 06:44:51,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:44:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:44:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:45:07,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 06:45:07,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 125 transitions, 1335 flow. Second operand has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:07,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:07,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 06:45:07,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:21,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:23,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:25,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:27,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:29,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:31,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:33,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:35,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:37,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:39,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:42,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:56,458 INFO L130 PetriNetUnfolder]: 49741/70698 cut-off events. [2023-08-30 06:45:56,458 INFO L131 PetriNetUnfolder]: For 315561/328916 co-relation queries the response was YES. [2023-08-30 06:45:57,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240186 conditions, 70698 events. 49741/70698 cut-off events. For 315561/328916 co-relation queries the response was YES. Maximal size of possible extension queue 2722. Compared 513848 event pairs, 34452 based on Foata normal form. 12350/62966 useless extension candidates. Maximal degree in co-relation 240139. Up to 8429 conditions per place. [2023-08-30 06:45:57,324 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 437 selfloop transitions, 70 changer transitions 0/519 dead transitions. [2023-08-30 06:45:57,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 519 transitions, 4575 flow [2023-08-30 06:45:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:45:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:45:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4462 transitions. [2023-08-30 06:45:57,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42193853427895983 [2023-08-30 06:45:57,329 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4462 transitions. [2023-08-30 06:45:57,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4462 transitions. [2023-08-30 06:45:57,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:57,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4462 transitions. [2023-08-30 06:45:57,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 178.48) internal successors, (4462), 25 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 423.0) internal successors, (10998), 26 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,343 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 423.0) internal successors, (10998), 26 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,344 INFO L175 Difference]: Start difference. First operand has 178 places, 125 transitions, 1335 flow. Second operand 25 states and 4462 transitions. [2023-08-30 06:45:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 519 transitions, 4575 flow [2023-08-30 06:45:57,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 519 transitions, 4482 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 06:45:57,623 INFO L231 Difference]: Finished difference. Result has 211 places, 154 transitions, 1846 flow [2023-08-30 06:45:57,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1846, PETRI_PLACES=211, PETRI_TRANSITIONS=154} [2023-08-30 06:45:57,623 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 151 predicate places. [2023-08-30 06:45:57,623 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 154 transitions, 1846 flow [2023-08-30 06:45:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:57,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:57,632 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 06:45:57,824 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 06:45:57,825 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:45:57,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash -992414767, now seen corresponding path program 2 times [2023-08-30 06:45:57,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:57,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805195163] [2023-08-30 06:45:57,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:57,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:57,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:57,827 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 06:45:57,827 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 06:45:58,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:45:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:45:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:58,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:58,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:58,289 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:45:58,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:45:58,353 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 06:45:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 06:45:58,364 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:45:58,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:45:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 06:45:58,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:58,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:58,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805195163] [2023-08-30 06:45:58,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805195163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:58,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:58,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:45:58,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489924279] [2023-08-30 06:45:58,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:58,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:45:58,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:45:58,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:45:59,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 423 [2023-08-30 06:45:59,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 154 transitions, 1846 flow. Second operand has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:59,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:59,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 423 [2023-08-30 06:45:59,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:06,519 INFO L130 PetriNetUnfolder]: 32294/45970 cut-off events. [2023-08-30 06:46:06,520 INFO L131 PetriNetUnfolder]: For 192485/202049 co-relation queries the response was YES. [2023-08-30 06:46:07,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159487 conditions, 45970 events. 32294/45970 cut-off events. For 192485/202049 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 325364 event pairs, 21503 based on Foata normal form. 10454/45939 useless extension candidates. Maximal degree in co-relation 159422. Up to 45422 conditions per place. [2023-08-30 06:46:07,392 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 89 selfloop transitions, 47 changer transitions 0/148 dead transitions. [2023-08-30 06:46:07,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 148 transitions, 2080 flow [2023-08-30 06:46:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:46:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:46:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 837 transitions. [2023-08-30 06:46:07,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39574468085106385 [2023-08-30 06:46:07,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 837 transitions. [2023-08-30 06:46:07,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 837 transitions. [2023-08-30 06:46:07,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:07,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 837 transitions. [2023-08-30 06:46:07,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.4) internal successors, (837), 5 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:07,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:07,396 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:07,396 INFO L175 Difference]: Start difference. First operand has 211 places, 154 transitions, 1846 flow. Second operand 5 states and 837 transitions. [2023-08-30 06:46:07,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 148 transitions, 2080 flow [2023-08-30 06:46:07,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 148 transitions, 1913 flow, removed 35 selfloop flow, removed 10 redundant places. [2023-08-30 06:46:07,740 INFO L231 Difference]: Finished difference. Result has 199 places, 148 transitions, 1735 flow [2023-08-30 06:46:07,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1735, PETRI_PLACES=199, PETRI_TRANSITIONS=148} [2023-08-30 06:46:07,741 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 139 predicate places. [2023-08-30 06:46:07,741 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 148 transitions, 1735 flow [2023-08-30 06:46:07,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:07,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:07,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:07,748 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 06:46:07,941 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 06:46:07,942 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:46:07,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -986087998, now seen corresponding path program 2 times [2023-08-30 06:46:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:07,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446701652] [2023-08-30 06:46:07,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:46:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:07,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:07,943 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 06:46:07,945 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 06:46:08,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:46:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:46:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:08,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:08,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:08,222 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:46:08,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:46:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:46:08,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:46:08,298 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:46:08,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:46:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:46:08,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:46:08,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:08,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446701652] [2023-08-30 06:46:08,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446701652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:46:08,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:46:08,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:46:08,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906993440] [2023-08-30 06:46:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:46:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:46:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:46:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:46:09,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-08-30 06:46:09,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 148 transitions, 1735 flow. Second operand has 6 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:09,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:09,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-08-30 06:46:09,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:16,760 INFO L130 PetriNetUnfolder]: 33615/47384 cut-off events. [2023-08-30 06:46:16,760 INFO L131 PetriNetUnfolder]: For 205420/211132 co-relation queries the response was YES. [2023-08-30 06:46:17,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162650 conditions, 47384 events. 33615/47384 cut-off events. For 205420/211132 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 326984 event pairs, 13794 based on Foata normal form. 7684/44416 useless extension candidates. Maximal degree in co-relation 162584. Up to 30306 conditions per place. [2023-08-30 06:46:17,446 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 139 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2023-08-30 06:46:17,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 179 transitions, 2259 flow [2023-08-30 06:46:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:46:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:46:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2023-08-30 06:46:17,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979511426319937 [2023-08-30 06:46:17,448 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2023-08-30 06:46:17,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2023-08-30 06:46:17,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:17,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2023-08-30 06:46:17,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:17,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:17,452 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:17,452 INFO L175 Difference]: Start difference. First operand has 199 places, 148 transitions, 1735 flow. Second operand 6 states and 1010 transitions. [2023-08-30 06:46:17,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 179 transitions, 2259 flow [2023-08-30 06:46:17,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 179 transitions, 2189 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:46:17,731 INFO L231 Difference]: Finished difference. Result has 202 places, 148 transitions, 1730 flow [2023-08-30 06:46:17,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1730, PETRI_PLACES=202, PETRI_TRANSITIONS=148} [2023-08-30 06:46:17,732 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 142 predicate places. [2023-08-30 06:46:17,732 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 148 transitions, 1730 flow [2023-08-30 06:46:17,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:17,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:17,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:17,739 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 06:46:17,933 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 06:46:17,933 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:46:17,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash -992414769, now seen corresponding path program 3 times [2023-08-30 06:46:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:17,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120587560] [2023-08-30 06:46:17,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:46:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:17,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:17,935 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 06:46:17,935 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 06:46:18,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:46:18,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:46:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:18,243 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:18,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:18,328 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:46:18,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:46:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:46:18,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:46:18,405 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:46:18,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:46:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:46:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:46:19,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120587560] [2023-08-30 06:46:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120587560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:19,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:19,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:46:19,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835511420] [2023-08-30 06:46:19,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:19,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:46:19,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:19,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:46:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:46:25,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 423 [2023-08-30 06:46:25,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 148 transitions, 1730 flow. Second operand has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:25,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:25,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 423 [2023-08-30 06:46:25,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand