./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.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-min-max-dec.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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --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 06:27:29,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:27:29,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:27:29,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:27:29,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:27:29,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:27:29,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:27:29,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:27:29,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:27:29,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:27:29,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:27:29,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:27:29,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:27:29,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:27:29,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:27:29,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:27:29,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:27:29,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:27:29,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:27:29,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:27:29,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:27:29,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:27:29,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:27:29,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:27:29,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:27:29,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:27:29,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:27:29,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:27:29,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:27:29,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:27:29,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:27:29,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:27:29,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:27:29,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:27:29,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:27:29,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:27:29,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:27:29,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:27:29,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:27:29,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:27:29,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:27:29,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:27:29,436 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:27:29,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:27:29,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:27:29,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:27:29,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:27:29,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:27:29,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:27:29,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:27:29,439 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:27:29,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:27:29,440 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:27:29,440 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:27:29,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:27:29,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:27:29,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:27:29,441 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:27:29,441 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:27:29,441 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:27:29,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:27:29,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:27:29,442 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:27:29,442 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:27:29,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:27:29,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:27:29,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:27:29,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:27:29,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:27:29,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:27:29,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:27:29,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:27:29,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:27:29,445 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:27:29,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:27:29,445 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:27:29,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:27:29,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:27:29,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:27:29,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:27:29,775 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:27:29,776 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:27:29,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 06:27:31,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:27:31,231 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:27:31,232 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 06:27:31,237 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d42f093ca/0d853dad9ad64d91a6a803a4df037a6b/FLAGec2f3ac56 [2023-08-30 06:27:31,253 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d42f093ca/0d853dad9ad64d91a6a803a4df037a6b [2023-08-30 06:27:31,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:27:31,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:27:31,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:27:31,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:27:31,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:27:31,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:27:31" (1/1) ... [2023-08-30 06:27:31,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20986f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:31, skipping insertion in model container [2023-08-30 06:27:31,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:27:31" (1/1) ... [2023-08-30 06:27:31,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:27:31,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:27:31,482 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-min-max-dec.wvr.c[3019,3032] [2023-08-30 06:27:31,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:27:31,512 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 06:27:31,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24b2302d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:31, skipping insertion in model container [2023-08-30 06:27:31,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:27:31,515 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:27:31,521 INFO L158 Benchmark]: Toolchain (without parser) took 257.87ms. Allocated memory is still 79.7MB. Free memory was 57.7MB in the beginning and 47.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:27:31,521 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:27:31,522 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.12ms. Allocated memory is still 79.7MB. Free memory was 57.4MB in the beginning and 47.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:27:31,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.12ms. Allocated memory is still 79.7MB. Free memory was 57.4MB in the beginning and 47.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: 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-min-max-dec.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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --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 06:27:33,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:27:33,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:27:33,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:27:33,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:27:33,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:27:33,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:27:33,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:27:33,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:27:33,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:27:33,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:27:33,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:27:33,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:27:33,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:27:33,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:27:33,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:27:33,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:27:33,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:27:33,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:27:33,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:27:33,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:27:33,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:27:33,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:27:33,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:27:33,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:27:33,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:27:33,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:27:33,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:27:33,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:27:33,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:27:33,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:27:33,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:27:33,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:27:33,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:27:33,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:27:33,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:27:33,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:27:33,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:27:33,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:27:33,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:27:33,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:27:33,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:27:33,366 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:27:33,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:27:33,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:27:33,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:27:33,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:27:33,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:27:33,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:27:33,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:27:33,369 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:27:33,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:27:33,371 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:27:33,371 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:27:33,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:27:33,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:27:33,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:27:33,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:27:33,372 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:27:33,372 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:27:33,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:27:33,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:27:33,372 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:27:33,373 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:27:33,373 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:27:33,373 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:27:33,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:27:33,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:27:33,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:27:33,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:27:33,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:27:33,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:27:33,374 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:27:33,375 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:27:33,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:27:33,375 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:27:33,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:27:33,376 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:27:33,376 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:27:33,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:27:33,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:27:33,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:27:33,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:27:33,697 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:27:33,697 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:27:33,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 06:27:34,891 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:27:35,143 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:27:35,144 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 06:27:35,152 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6ff706a7/b41d1dd6dac04e9986a8f2f281fdae7e/FLAG820d4d3e9 [2023-08-30 06:27:35,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6ff706a7/b41d1dd6dac04e9986a8f2f281fdae7e [2023-08-30 06:27:35,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:27:35,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:27:35,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:27:35,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:27:35,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:27:35,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ec0c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35, skipping insertion in model container [2023-08-30 06:27:35,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:27:35,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:27:35,336 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-min-max-dec.wvr.c[3019,3032] [2023-08-30 06:27:35,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:27:35,356 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:27:35,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:27:35,374 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-min-max-dec.wvr.c[3019,3032] [2023-08-30 06:27:35,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:27:35,383 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:27:35,404 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-min-max-dec.wvr.c[3019,3032] [2023-08-30 06:27:35,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:27:35,427 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:27:35,433 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:27:35,440 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:27:35,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35 WrapperNode [2023-08-30 06:27:35,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:27:35,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:27:35,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:27:35,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:27:35,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,499 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2023-08-30 06:27:35,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:27:35,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:27:35,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:27:35,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:27:35,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,556 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:27:35,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:27:35,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:27:35,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:27:35,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (1/1) ... [2023-08-30 06:27:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:27:35,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:27:35,606 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 06:27:35,637 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 06:27:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:27:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:27:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:27:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:27:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:27:35,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:27:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:27:35,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:27:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:27:35,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:27:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:27:35,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:27:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:27:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:27:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:27:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:27:35,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:27:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:27:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:27:35,655 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 06:27:35,799 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:27:35,800 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:27:36,329 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:27:36,539 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:27:36,540 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:27:36,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:27:36 BoogieIcfgContainer [2023-08-30 06:27:36,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:27:36,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:27:36,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:27:36,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:27:36,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:27:35" (1/3) ... [2023-08-30 06:27:36,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145afda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:27:36, skipping insertion in model container [2023-08-30 06:27:36,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:27:35" (2/3) ... [2023-08-30 06:27:36,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145afda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:27:36, skipping insertion in model container [2023-08-30 06:27:36,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:27:36" (3/3) ... [2023-08-30 06:27:36,550 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2023-08-30 06:27:36,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:27:36,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 06:27:36,564 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:27:36,672 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:27:36,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 200 transitions, 432 flow [2023-08-30 06:27:36,812 INFO L130 PetriNetUnfolder]: 12/196 cut-off events. [2023-08-30 06:27:36,812 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:27:36,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 196 events. 12/196 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-30 06:27:36,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 200 transitions, 432 flow [2023-08-30 06:27:36,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 192 transitions, 408 flow [2023-08-30 06:27:36,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:27:36,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 192 transitions, 408 flow [2023-08-30 06:27:36,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 192 transitions, 408 flow [2023-08-30 06:27:36,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 192 transitions, 408 flow [2023-08-30 06:27:36,887 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2023-08-30 06:27:36,887 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:27:36,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 192 events. 12/192 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-30 06:27:36,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2023-08-30 06:27:54,641 INFO L134 LiptonReduction]: Checked pairs total: 8115 [2023-08-30 06:27:54,642 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 06:27:54,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:27:54,666 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;@11940d9f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:27:54,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-30 06:27:54,669 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:27:54,669 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:27:54,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:54,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:27:54,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:27:54,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:27:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash 26204, now seen corresponding path program 1 times [2023-08-30 06:27:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:27:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948222466] [2023-08-30 06:27:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:27:54,685 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 06:27:54,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:27:54,693 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 06:27:54,699 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 06:27:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:27:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:27:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:27:55,036 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:27:55,037 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:27:55,107 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 06:27:55,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:27:55,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:27:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948222466] [2023-08-30 06:27:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948222466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:27:55,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:27:55,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:27:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292738521] [2023-08-30 06:27:55,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:27:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:27:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:27:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:27:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:27:55,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 384 [2023-08-30 06:27:55,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:55,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:27:55,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 384 [2023-08-30 06:27:55,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:27:58,149 INFO L130 PetriNetUnfolder]: 18239/23498 cut-off events. [2023-08-30 06:27:58,150 INFO L131 PetriNetUnfolder]: For 408/408 co-relation queries the response was YES. [2023-08-30 06:27:58,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47992 conditions, 23498 events. 18239/23498 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 122413 event pairs, 12836 based on Foata normal form. 0/10355 useless extension candidates. Maximal degree in co-relation 21660. Up to 11727 conditions per place. [2023-08-30 06:27:58,328 INFO L137 encePairwiseOnDemand]: 372/384 looper letters, 104 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-30 06:27:58,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 482 flow [2023-08-30 06:27:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:27:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:27:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-30 06:27:58,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-08-30 06:27:58,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-30 06:27:58,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-30 06:27:58,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:27:58,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-30 06:27:58,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:58,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:58,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:58,362 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 620 transitions. [2023-08-30 06:27:58,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 482 flow [2023-08-30 06:27:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 450 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:27:58,412 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 138 flow [2023-08-30 06:27:58,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-08-30 06:27:58,417 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-08-30 06:27:58,418 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 138 flow [2023-08-30 06:27:58,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:58,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:58,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:27:58,434 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 06:27:58,634 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 06:27:58,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:27:58,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:27:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash 26255, now seen corresponding path program 1 times [2023-08-30 06:27:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:27:58,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249107095] [2023-08-30 06:27:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:27:58,637 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 06:27:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:27:58,638 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 06:27:58,641 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 06:27:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:27:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:27:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:27:58,746 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 06:27:58,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:27:58,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:27:58,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249107095] [2023-08-30 06:27:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249107095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:27:58,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:27:58,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:27:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842685179] [2023-08-30 06:27:58,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:27:58,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:27:58,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:27:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:27:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:27:58,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2023-08-30 06:27:58,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:58,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:27:58,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2023-08-30 06:27:58,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:27:59,830 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2023-08-30 06:27:59,831 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 06:27:59,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 11752 events. 9120/11752 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56085 event pairs, 6418 based on Foata normal form. 0/5172 useless extension candidates. Maximal degree in co-relation 23699. Up to 11727 conditions per place. [2023-08-30 06:27:59,904 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-30 06:27:59,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 252 flow [2023-08-30 06:27:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:27:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:27:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-30 06:27:59,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835069444444444 [2023-08-30 06:27:59,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-30 06:27:59,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-30 06:27:59,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:27:59,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-30 06:27:59,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:59,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:59,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:59,913 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 557 transitions. [2023-08-30 06:27:59,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 252 flow [2023-08-30 06:27:59,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:27:59,915 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 148 flow [2023-08-30 06:27:59,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-30 06:27:59,916 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-08-30 06:27:59,916 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 148 flow [2023-08-30 06:27:59,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:59,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:59,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:27:59,931 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 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:28:00,125 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 06:28:00,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:00,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash 26202, now seen corresponding path program 1 times [2023-08-30 06:28:00,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:00,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150572419] [2023-08-30 06:28:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:00,127 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 06:28:00,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:00,132 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 06:28:00,135 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 (4)] Waiting until timeout for monitored process [2023-08-30 06:28:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:28:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:00,309 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:28:00,309 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:28:00,328 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 06:28:00,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:00,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:00,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150572419] [2023-08-30 06:28:00,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150572419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:00,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:00,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:28:00,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35321284] [2023-08-30 06:28:00,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:00,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:28:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:00,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:28:00,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:28:00,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 06:28:00,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:00,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:00,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 06:28:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:01,275 INFO L130 PetriNetUnfolder]: 9120/11750 cut-off events. [2023-08-30 06:28:01,276 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 06:28:01,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23714 conditions, 11750 events. 9120/11750 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56221 event pairs, 6418 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 23700. Up to 11726 conditions per place. [2023-08-30 06:28:01,339 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 06:28:01,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 254 flow [2023-08-30 06:28:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:28:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:28:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-30 06:28:01,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-30 06:28:01,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-30 06:28:01,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-30 06:28:01,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:01,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-30 06:28:01,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:01,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:01,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:01,347 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 148 flow. Second operand 3 states and 540 transitions. [2023-08-30 06:28:01,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 254 flow [2023-08-30 06:28:01,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 248 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 06:28:01,349 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 142 flow [2023-08-30 06:28:01,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-30 06:28:01,350 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -13 predicate places. [2023-08-30 06:28:01,351 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 142 flow [2023-08-30 06:28:01,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:01,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:01,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:28:01,362 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 (4)] Ended with exit code 0 [2023-08-30 06:28:01,560 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 06:28:01,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:01,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 814740, now seen corresponding path program 1 times [2023-08-30 06:28:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:01,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058143381] [2023-08-30 06:28:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:01,563 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 06:28:01,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:01,564 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 06:28:01,567 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 06:28:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:28:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:01,787 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-08-30 06:28:01,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-08-30 06:28:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:01,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:01,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:01,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058143381] [2023-08-30 06:28:01,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058143381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:01,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:01,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:28:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597142833] [2023-08-30 06:28:01,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:28:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:28:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:28:02,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 06:28:02,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:02,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:02,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 06:28:02,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:02,802 INFO L130 PetriNetUnfolder]: 7644/9913 cut-off events. [2023-08-30 06:28:02,802 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 06:28:02,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 9913 events. 7644/9913 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 46761 event pairs, 5350 based on Foata normal form. 0/4487 useless extension candidates. Maximal degree in co-relation 20028. Up to 9889 conditions per place. [2023-08-30 06:28:02,861 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 51 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 06:28:02,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 240 flow [2023-08-30 06:28:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:28:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:28:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 06:28:02,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678819444444444 [2023-08-30 06:28:02,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 06:28:02,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 06:28:02,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:02,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 06:28:02,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:02,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:02,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:02,869 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 142 flow. Second operand 3 states and 539 transitions. [2023-08-30 06:28:02,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 240 flow [2023-08-30 06:28:02,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:28:02,871 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 137 flow [2023-08-30 06:28:02,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-30 06:28:02,871 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-08-30 06:28:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 137 flow [2023-08-30 06:28:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:02,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:28:02,883 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 06:28:03,080 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 06:28:03,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:03,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash 814739, now seen corresponding path program 1 times [2023-08-30 06:28:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135876074] [2023-08-30 06:28:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:03,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:28:03,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:03,083 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 06:28:03,084 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 06:28:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:03,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:28:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:03,346 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-08-30 06:28:03,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-08-30 06:28:03,400 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 06:28:03,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 88 [2023-08-30 06:28:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:03,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:03,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:03,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135876074] [2023-08-30 06:28:03,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135876074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:03,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:03,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:28:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940962425] [2023-08-30 06:28:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:28:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:28:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:28:03,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2023-08-30 06:28:03,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:03,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:03,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2023-08-30 06:28:03,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:04,304 INFO L130 PetriNetUnfolder]: 6168/8076 cut-off events. [2023-08-30 06:28:04,304 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 06:28:04,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 8076 events. 6168/8076 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 37791 event pairs, 4282 based on Foata normal form. 0/3803 useless extension candidates. Maximal degree in co-relation 16353. Up to 8052 conditions per place. [2023-08-30 06:28:04,342 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 49 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 06:28:04,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 231 flow [2023-08-30 06:28:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:28:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:28:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-30 06:28:04,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2023-08-30 06:28:04,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-30 06:28:04,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-30 06:28:04,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:04,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-30 06:28:04,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:04,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:04,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:04,349 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 137 flow. Second operand 3 states and 543 transitions. [2023-08-30 06:28:04,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 231 flow [2023-08-30 06:28:04,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:28:04,351 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 132 flow [2023-08-30 06:28:04,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=132, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-30 06:28:04,352 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-08-30 06:28:04,352 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 132 flow [2023-08-30 06:28:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:04,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:04,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:28:04,367 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 06:28:04,562 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 06:28:04,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:04,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 814689, now seen corresponding path program 1 times [2023-08-30 06:28:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:04,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567800752] [2023-08-30 06:28:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:04,563 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 06:28:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:04,565 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 06:28:04,566 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 (7)] Waiting until timeout for monitored process [2023-08-30 06:28:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:04,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:28:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:04,790 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:28:04,790 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:28:04,856 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 06:28:04,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:05,054 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 06:28:05,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567800752] [2023-08-30 06:28:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567800752] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:05,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:05,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:28:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829498224] [2023-08-30 06:28:05,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:28:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:28:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:28:05,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-08-30 06:28:05,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:05,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:05,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-08-30 06:28:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:07,426 INFO L130 PetriNetUnfolder]: 12337/16153 cut-off events. [2023-08-30 06:28:07,426 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 06:28:07,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32723 conditions, 16153 events. 12337/16153 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 82373 event pairs, 8564 based on Foata normal form. 0/7626 useless extension candidates. Maximal degree in co-relation 32712. Up to 8051 conditions per place. [2023-08-30 06:28:07,485 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 94 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2023-08-30 06:28:07,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 456 flow [2023-08-30 06:28:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:28:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:28:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1046 transitions. [2023-08-30 06:28:07,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539930555555556 [2023-08-30 06:28:07,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1046 transitions. [2023-08-30 06:28:07,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1046 transitions. [2023-08-30 06:28:07,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:07,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1046 transitions. [2023-08-30 06:28:07,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.33333333333334) internal successors, (1046), 6 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:07,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:07,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:07,497 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 132 flow. Second operand 6 states and 1046 transitions. [2023-08-30 06:28:07,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 456 flow [2023-08-30 06:28:07,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:28:07,500 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 189 flow [2023-08-30 06:28:07,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-08-30 06:28:07,501 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-08-30 06:28:07,501 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 189 flow [2023-08-30 06:28:07,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:07,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:07,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:28:07,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:28:07,710 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 06:28:07,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:07,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 782982615, now seen corresponding path program 1 times [2023-08-30 06:28:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090859482] [2023-08-30 06:28:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:07,712 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 06:28:07,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:07,713 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 06:28:07,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:28:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:28:07,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:07,900 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-08-30 06:28:07,901 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 7 case distinctions, treesize of input 49 treesize of output 62 [2023-08-30 06:28:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:08,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:08,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090859482] [2023-08-30 06:28:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090859482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:08,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:28:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777496453] [2023-08-30 06:28:08,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:28:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:28:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:28:08,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 06:28:08,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:08,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:08,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 06:28:08,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:09,222 INFO L130 PetriNetUnfolder]: 11953/15637 cut-off events. [2023-08-30 06:28:09,222 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 06:28:09,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31715 conditions, 15637 events. 11953/15637 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 79777 event pairs, 8298 based on Foata normal form. 0/7435 useless extension candidates. Maximal degree in co-relation 31699. Up to 15589 conditions per place. [2023-08-30 06:28:09,321 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 06:28:09,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 291 flow [2023-08-30 06:28:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:28:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:28:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 06:28:09,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2023-08-30 06:28:09,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 06:28:09,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 06:28:09,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:09,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 06:28:09,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:09,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:09,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:09,327 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 189 flow. Second operand 3 states and 535 transitions. [2023-08-30 06:28:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 291 flow [2023-08-30 06:28:09,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:28:09,330 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 173 flow [2023-08-30 06:28:09,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-30 06:28:09,330 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2023-08-30 06:28:09,330 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 173 flow [2023-08-30 06:28:09,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:09,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:09,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:28:09,339 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 06:28:09,536 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 06:28:09,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:09,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash 782982613, now seen corresponding path program 1 times [2023-08-30 06:28:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:09,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248427399] [2023-08-30 06:28:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:09,538 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 06:28:09,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:09,540 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 06:28:09,540 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 06:28:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:28:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:09,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:09,760 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-08-30 06:28:09,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-08-30 06:28:09,792 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:28:09,793 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 31 treesize of output 27 [2023-08-30 06:28:10,202 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 06:28:10,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:10,343 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 06:28:10,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248427399] [2023-08-30 06:28:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248427399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:10,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:10,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:28:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884557668] [2023-08-30 06:28:10,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:10,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:28:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:28:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:28:12,855 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 06:28:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 384 [2023-08-30 06:28:13,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 153.25) internal successors, (1226), 8 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:13,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:13,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 384 [2023-08-30 06:28:13,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:14,738 INFO L130 PetriNetUnfolder]: 11569/15121 cut-off events. [2023-08-30 06:28:14,739 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-30 06:28:14,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30678 conditions, 15121 events. 11569/15121 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 76800 event pairs, 8032 based on Foata normal form. 0/7279 useless extension candidates. Maximal degree in co-relation 30661. Up to 7539 conditions per place. [2023-08-30 06:28:14,826 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 90 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-30 06:28:14,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 453 flow [2023-08-30 06:28:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:28:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:28:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 853 transitions. [2023-08-30 06:28:14,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44427083333333334 [2023-08-30 06:28:14,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 853 transitions. [2023-08-30 06:28:14,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 853 transitions. [2023-08-30 06:28:14,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:14,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 853 transitions. [2023-08-30 06:28:14,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.6) internal successors, (853), 5 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:14,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:14,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:14,833 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 173 flow. Second operand 5 states and 853 transitions. [2023-08-30 06:28:14,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 453 flow [2023-08-30 06:28:14,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:28:14,834 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 174 flow [2023-08-30 06:28:14,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-08-30 06:28:14,835 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-08-30 06:28:14,841 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 174 flow [2023-08-30 06:28:14,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.25) internal successors, (1226), 8 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:14,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:14,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:28:14,853 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 06:28:15,051 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 06:28:15,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:15,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 782982390, now seen corresponding path program 1 times [2023-08-30 06:28:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060256949] [2023-08-30 06:28:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:15,053 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 06:28:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:15,054 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 06:28:15,056 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 06:28:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:28:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:15,212 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:28:15,213 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:28:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:15,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:15,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060256949] [2023-08-30 06:28:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060256949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:28:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999193546] [2023-08-30 06:28:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:28:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:28:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:28:15,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 384 [2023-08-30 06:28:15,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:15,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:15,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 384 [2023-08-30 06:28:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:16,044 INFO L130 PetriNetUnfolder]: 6411/8489 cut-off events. [2023-08-30 06:28:16,044 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 06:28:16,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 8489 events. 6411/8489 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 40190 event pairs, 4360 based on Foata normal form. 0/4745 useless extension candidates. Maximal degree in co-relation 17227. Up to 8446 conditions per place. [2023-08-30 06:28:16,070 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-30 06:28:16,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 51 transitions, 260 flow [2023-08-30 06:28:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:28:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:28:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-08-30 06:28:16,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342447916666667 [2023-08-30 06:28:16,072 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-08-30 06:28:16,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-08-30 06:28:16,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:16,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-08-30 06:28:16,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 06:28:16,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 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 06:28:16,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 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 06:28:16,077 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 174 flow. Second operand 4 states and 667 transitions. [2023-08-30 06:28:16,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 51 transitions, 260 flow [2023-08-30 06:28:16,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:28:16,079 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 167 flow [2023-08-30 06:28:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-30 06:28:16,079 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-08-30 06:28:16,080 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 167 flow [2023-08-30 06:28:16,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:16,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:16,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:28:16,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:28:16,298 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 06:28:16,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:16,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash 782982391, now seen corresponding path program 1 times [2023-08-30 06:28:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:16,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092981744] [2023-08-30 06:28:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:16,299 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 06:28:16,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:16,300 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 06:28:16,301 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 06:28:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:28:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:16,409 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 06:28:16,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:16,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 06:28:16,539 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 06:28:16,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:16,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092981744] [2023-08-30 06:28:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092981744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:16,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:16,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:28:16,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134278308] [2023-08-30 06:28:16,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:28:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:28:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:28:17,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 384 [2023-08-30 06:28:17,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 167 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 06:28:17,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:17,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 384 [2023-08-30 06:28:17,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:18,037 INFO L130 PetriNetUnfolder]: 6411/8483 cut-off events. [2023-08-30 06:28:18,037 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 06:28:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17242 conditions, 8483 events. 6411/8483 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39916 event pairs, 4360 based on Foata normal form. 0/4749 useless extension candidates. Maximal degree in co-relation 17224. Up to 4224 conditions per place. [2023-08-30 06:28:18,072 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-08-30 06:28:18,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 431 flow [2023-08-30 06:28:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:28:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:28:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1179 transitions. [2023-08-30 06:28:18,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43861607142857145 [2023-08-30 06:28:18,075 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1179 transitions. [2023-08-30 06:28:18,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1179 transitions. [2023-08-30 06:28:18,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:18,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1179 transitions. [2023-08-30 06:28:18,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.42857142857142) internal successors, (1179), 7 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:18,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:18,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:18,082 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 167 flow. Second operand 7 states and 1179 transitions. [2023-08-30 06:28:18,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 431 flow [2023-08-30 06:28:18,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:28:18,084 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 181 flow [2023-08-30 06:28:18,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-30 06:28:18,085 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2023-08-30 06:28:18,085 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 181 flow [2023-08-30 06:28:18,086 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 06:28:18,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:18,086 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:28:18,095 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 06:28:18,294 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 06:28:18,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:18,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1497055332, now seen corresponding path program 2 times [2023-08-30 06:28:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:18,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631627417] [2023-08-30 06:28:18,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:28:18,296 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 06:28:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:18,297 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 06:28:18,297 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 06:28:18,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:28:18,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:28:18,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:28:18,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:18,548 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:28:18,548 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:28:18,656 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 06:28:18,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:19,275 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 06:28:19,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631627417] [2023-08-30 06:28:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631627417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:19,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:19,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:28:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678348930] [2023-08-30 06:28:19,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:19,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:28:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:28:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:28:22,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 384 [2023-08-30 06:28:22,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:22,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:22,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 384 [2023-08-30 06:28:22,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:28,209 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2023-08-30 06:28:28,209 INFO L131 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2023-08-30 06:28:28,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77424 conditions, 38147 events. 28838/38147 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 212443 event pairs, 19620 based on Foata normal form. 6/21385 useless extension candidates. Maximal degree in co-relation 77406. Up to 4224 conditions per place. [2023-08-30 06:28:28,428 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 353 selfloop transitions, 12 changer transitions 0/366 dead transitions. [2023-08-30 06:28:28,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 366 transitions, 1673 flow [2023-08-30 06:28:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:28:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:28:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2267 transitions. [2023-08-30 06:28:28,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919704861111111 [2023-08-30 06:28:28,435 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2267 transitions. [2023-08-30 06:28:28,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2267 transitions. [2023-08-30 06:28:28,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:28,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2267 transitions. [2023-08-30 06:28:28,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.91666666666666) internal successors, (2267), 12 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:28,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:28,446 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:28,446 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 181 flow. Second operand 12 states and 2267 transitions. [2023-08-30 06:28:28,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 366 transitions, 1673 flow [2023-08-30 06:28:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 366 transitions, 1656 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 06:28:28,451 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 265 flow [2023-08-30 06:28:28,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-08-30 06:28:28,451 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-08-30 06:28:28,451 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 265 flow [2023-08-30 06:28:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:28,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:28,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:28,459 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 06:28:28,652 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 06:28:28,653 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:28,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 827034521, now seen corresponding path program 1 times [2023-08-30 06:28:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805858003] [2023-08-30 06:28:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:28,654 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 06:28:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:28,655 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 06:28:28,657 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 06:28:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:28,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:28:28,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:28,833 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 06:28:28,833 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 5 case distinctions, treesize of input 36 treesize of output 51 [2023-08-30 06:28:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:29,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:29,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805858003] [2023-08-30 06:28:29,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805858003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:29,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:28:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058331046] [2023-08-30 06:28:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:29,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:28:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:28:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:28:29,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 06:28:29,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:29,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:29,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 06:28:29,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:31,857 INFO L130 PetriNetUnfolder]: 28244/37256 cut-off events. [2023-08-30 06:28:31,857 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 06:28:31,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75672 conditions, 37256 events. 28244/37256 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 209014 event pairs, 19170 based on Foata normal form. 0/20957 useless extension candidates. Maximal degree in co-relation 75648. Up to 37121 conditions per place. [2023-08-30 06:28:32,073 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 06:28:32,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 55 transitions, 369 flow [2023-08-30 06:28:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:28:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:28:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-30 06:28:32,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-30 06:28:32,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-30 06:28:32,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-30 06:28:32,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:32,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-30 06:28:32,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:32,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:32,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:32,081 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 265 flow. Second operand 3 states and 528 transitions. [2023-08-30 06:28:32,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 55 transitions, 369 flow [2023-08-30 06:28:32,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 55 transitions, 344 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:28:32,084 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 238 flow [2023-08-30 06:28:32,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=238, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2023-08-30 06:28:32,086 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-08-30 06:28:32,086 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 238 flow [2023-08-30 06:28:32,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:32,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:32,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:32,095 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 06:28:32,293 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 06:28:32,293 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:32,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash 827034520, now seen corresponding path program 1 times [2023-08-30 06:28:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:32,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049755825] [2023-08-30 06:28:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:32,294 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 06:28:32,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:32,295 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 06:28:32,296 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 06:28:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:32,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:28:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:28:32,538 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2023-08-30 06:28:32,538 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 4 case distinctions, treesize of input 20 treesize of output 59 [2023-08-30 06:28:32,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-30 06:28:32,717 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 06:28:32,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:32,879 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 06:28:32,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049755825] [2023-08-30 06:28:32,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049755825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:32,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:32,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:28:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291102959] [2023-08-30 06:28:32,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:32,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:28:32,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:28:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:28:33,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 06:28:33,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:33,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:33,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 06:28:33,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:35,883 INFO L130 PetriNetUnfolder]: 27650/36365 cut-off events. [2023-08-30 06:28:35,883 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-08-30 06:28:36,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73873 conditions, 36365 events. 27650/36365 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 203063 event pairs, 18720 based on Foata normal form. 0/20695 useless extension candidates. Maximal degree in co-relation 73848. Up to 32204 conditions per place. [2023-08-30 06:28:36,164 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 83 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-30 06:28:36,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 482 flow [2023-08-30 06:28:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:28:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:28:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-08-30 06:28:36,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-08-30 06:28:36,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-08-30 06:28:36,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-08-30 06:28:36,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:36,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-08-30 06:28:36,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:36,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:36,171 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:36,171 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 238 flow. Second operand 5 states and 844 transitions. [2023-08-30 06:28:36,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 482 flow [2023-08-30 06:28:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:28:36,174 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 239 flow [2023-08-30 06:28:36,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-08-30 06:28:36,175 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-08-30 06:28:36,175 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 239 flow [2023-08-30 06:28:36,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:36,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:36,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:36,185 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 (14)] Ended with exit code 0 [2023-08-30 06:28:36,385 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 06:28:36,385 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:36,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash 826824309, now seen corresponding path program 1 times [2023-08-30 06:28:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386120963] [2023-08-30 06:28:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:36,386 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 06:28:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:36,387 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 06:28:36,388 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 06:28:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:28:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:36,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:36,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386120963] [2023-08-30 06:28:36,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386120963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:36,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:36,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:28:36,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995209425] [2023-08-30 06:28:36,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:36,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:28:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:28:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:28:36,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-08-30 06:28:36,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:36,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:36,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-08-30 06:28:36,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:40,255 INFO L130 PetriNetUnfolder]: 41933/54851 cut-off events. [2023-08-30 06:28:40,255 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-30 06:28:40,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111460 conditions, 54851 events. 41933/54851 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 329691 event pairs, 6201 based on Foata normal form. 0/30902 useless extension candidates. Maximal degree in co-relation 111434. Up to 37404 conditions per place. [2023-08-30 06:28:40,705 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 91 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-08-30 06:28:40,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 533 flow [2023-08-30 06:28:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:28:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:28:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2023-08-30 06:28:40,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46041666666666664 [2023-08-30 06:28:40,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2023-08-30 06:28:40,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2023-08-30 06:28:40,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:40,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2023-08-30 06:28:40,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:40,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:40,713 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:40,713 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 239 flow. Second operand 5 states and 884 transitions. [2023-08-30 06:28:40,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 533 flow [2023-08-30 06:28:40,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:28:40,716 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 270 flow [2023-08-30 06:28:40,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-08-30 06:28:40,716 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-08-30 06:28:40,716 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 270 flow [2023-08-30 06:28:40,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:40,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:40,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:40,729 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 06:28:40,926 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 06:28:40,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:40,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -138246400, now seen corresponding path program 1 times [2023-08-30 06:28:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:40,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749776164] [2023-08-30 06:28:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:40,928 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 06:28:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:40,929 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 06:28:40,931 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 06:28:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:41,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:28:41,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:41,173 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:28:41,174 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:28:41,299 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 06:28:41,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:41,588 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 06:28:41,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:41,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749776164] [2023-08-30 06:28:41,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749776164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:41,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:41,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:28:41,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659123469] [2023-08-30 06:28:41,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:41,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:28:41,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:28:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:28:43,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 06:28:43,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:43,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:43,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 06:28:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:50,931 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2023-08-30 06:28:50,932 INFO L131 PetriNetUnfolder]: For 18379/18379 co-relation queries the response was YES. [2023-08-30 06:28:51,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183776 conditions, 77693 events. 60131/77693 cut-off events. For 18379/18379 co-relation queries the response was YES. Maximal size of possible extension queue 2990. Compared 465090 event pairs, 11511 based on Foata normal form. 1548/59414 useless extension candidates. Maximal degree in co-relation 183748. Up to 26965 conditions per place. [2023-08-30 06:28:51,667 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-08-30 06:28:51,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 772 flow [2023-08-30 06:28:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:28:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:28:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1355 transitions. [2023-08-30 06:28:51,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410807291666667 [2023-08-30 06:28:51,671 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1355 transitions. [2023-08-30 06:28:51,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1355 transitions. [2023-08-30 06:28:51,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:28:51,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1355 transitions. [2023-08-30 06:28:51,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.375) internal successors, (1355), 8 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:51,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:51,677 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:51,677 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 270 flow. Second operand 8 states and 1355 transitions. [2023-08-30 06:28:51,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 772 flow [2023-08-30 06:28:51,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 764 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 06:28:51,694 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 337 flow [2023-08-30 06:28:51,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-08-30 06:28:51,695 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-08-30 06:28:51,695 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 337 flow [2023-08-30 06:28:51,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:51,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:51,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:51,704 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 06:28:51,901 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 06:28:51,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:28:51,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 211056040, now seen corresponding path program 1 times [2023-08-30 06:28:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831109563] [2023-08-30 06:28:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:28:51,902 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 06:28:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:51,903 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 06:28:51,904 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 06:28:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:28:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:28:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:28:52,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:28:52,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831109563] [2023-08-30 06:28:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831109563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:28:52,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:28:52,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:28:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155328995] [2023-08-30 06:28:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:28:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:28:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:28:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:28:52,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-08-30 06:28:52,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:52,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:52,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-08-30 06:28:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:02,062 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2023-08-30 06:29:02,063 INFO L131 PetriNetUnfolder]: For 109206/109260 co-relation queries the response was YES. [2023-08-30 06:29:02,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305247 conditions, 109949 events. 85223/109949 cut-off events. For 109206/109260 co-relation queries the response was YES. Maximal size of possible extension queue 4092. Compared 657474 event pairs, 22545 based on Foata normal form. 18/83309 useless extension candidates. Maximal degree in co-relation 305213. Up to 77868 conditions per place. [2023-08-30 06:29:03,000 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-08-30 06:29:03,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 710 flow [2023-08-30 06:29:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:29:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:29:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-08-30 06:29:03,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2023-08-30 06:29:03,002 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-08-30 06:29:03,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-08-30 06:29:03,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:03,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-08-30 06:29:03,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:03,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:03,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:03,007 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 337 flow. Second operand 5 states and 882 transitions. [2023-08-30 06:29:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 710 flow [2023-08-30 06:29:03,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 683 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 06:29:03,234 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 340 flow [2023-08-30 06:29:03,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=340, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2023-08-30 06:29:03,234 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-08-30 06:29:03,235 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 340 flow [2023-08-30 06:29:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:03,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:03,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:29:03,242 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 06:29:03,436 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 06:29:03,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:29:03,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash 211245344, now seen corresponding path program 1 times [2023-08-30 06:29:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:03,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262918707] [2023-08-30 06:29:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:03,437 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 06:29:03,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:03,438 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 06:29:03,440 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 06:29:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:29:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:03,676 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:29:03,676 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:29:03,830 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 06:29:03,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:03,996 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 06:29:03,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262918707] [2023-08-30 06:29:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262918707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:03,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:29:03,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:29:03,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646252393] [2023-08-30 06:29:03,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:03,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:29:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:03,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:29:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:29:04,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 06:29:04,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:04,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:04,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 06:29:04,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:13,594 INFO L130 PetriNetUnfolder]: 75431/97547 cut-off events. [2023-08-30 06:29:13,594 INFO L131 PetriNetUnfolder]: For 102564/102564 co-relation queries the response was YES. [2023-08-30 06:29:14,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276511 conditions, 97547 events. 75431/97547 cut-off events. For 102564/102564 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 575079 event pairs, 49806 based on Foata normal form. 0/81815 useless extension candidates. Maximal degree in co-relation 276476. Up to 86644 conditions per place. [2023-08-30 06:29:14,597 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 99 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-08-30 06:29:14,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 704 flow [2023-08-30 06:29:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:29:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:29:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 840 transitions. [2023-08-30 06:29:14,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-08-30 06:29:14,599 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 840 transitions. [2023-08-30 06:29:14,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 840 transitions. [2023-08-30 06:29:14,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:14,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 840 transitions. [2023-08-30 06:29:14,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:14,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:14,602 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:14,602 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 340 flow. Second operand 5 states and 840 transitions. [2023-08-30 06:29:14,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 704 flow [2023-08-30 06:29:14,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:29:14,756 INFO L231 Difference]: Finished difference. Result has 92 places, 61 transitions, 332 flow [2023-08-30 06:29:14,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2023-08-30 06:29:14,757 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-08-30 06:29:14,757 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 332 flow [2023-08-30 06:29:14,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:14,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:14,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:29:14,767 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 (18)] Ended with exit code 0 [2023-08-30 06:29:14,965 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 06:29:14,965 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:29:14,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash 211245343, now seen corresponding path program 1 times [2023-08-30 06:29:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:14,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211176245] [2023-08-30 06:29:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:14,966 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 06:29:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:14,967 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 06:29:14,969 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 06:29:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:29:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:15,148 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 06:29:15,148 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 4 case distinctions, treesize of input 18 treesize of output 36 [2023-08-30 06:29:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:29:15,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:29:15,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211176245] [2023-08-30 06:29:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211176245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:29:15,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:29:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:29:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947035594] [2023-08-30 06:29:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:29:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:29:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:29:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:29:15,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 384 [2023-08-30 06:29:15,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:15,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:15,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 384 [2023-08-30 06:29:15,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:22,876 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2023-08-30 06:29:22,876 INFO L131 PetriNetUnfolder]: For 84618/84618 co-relation queries the response was YES. [2023-08-30 06:29:23,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238848 conditions, 85379 events. 65873/85379 cut-off events. For 84618/84618 co-relation queries the response was YES. Maximal size of possible extension queue 3101. Compared 497942 event pairs, 43587 based on Foata normal form. 0/73742 useless extension candidates. Maximal degree in co-relation 238813. Up to 85271 conditions per place. [2023-08-30 06:29:23,606 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 06:29:23,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 444 flow [2023-08-30 06:29:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:29:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:29:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 06:29:23,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2023-08-30 06:29:23,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 06:29:23,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 06:29:23,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:23,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 06:29:23,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:23,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:23,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:23,610 INFO L175 Difference]: Start difference. First operand has 92 places, 61 transitions, 332 flow. Second operand 3 states and 513 transitions. [2023-08-30 06:29:23,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 444 flow [2023-08-30 06:29:23,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:29:23,722 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 325 flow [2023-08-30 06:29:23,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2023-08-30 06:29:23,722 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2023-08-30 06:29:23,722 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 325 flow [2023-08-30 06:29:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:23,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:23,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:29:23,730 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 06:29:23,923 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 06:29:23,923 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:29:23,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2047193718, now seen corresponding path program 1 times [2023-08-30 06:29:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:23,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026841318] [2023-08-30 06:29:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:23,924 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 06:29:23,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:23,925 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 06:29:23,928 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 06:29:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:29:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:24,150 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:29:24,150 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:29:24,293 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 06:29:24,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:24,615 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 06:29:24,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:24,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026841318] [2023-08-30 06:29:24,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026841318] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:24,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:29:24,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:29:24,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257540669] [2023-08-30 06:29:24,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:29:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:29:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:29:26,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 06:29:26,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:26,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:26,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 06:29:26,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:38,859 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2023-08-30 06:29:38,860 INFO L131 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2023-08-30 06:29:39,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351689 conditions, 126239 events. 98849/126239 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 762910 event pairs, 23391 based on Foata normal form. 2628/113738 useless extension candidates. Maximal degree in co-relation 351654. Up to 47638 conditions per place. [2023-08-30 06:29:40,235 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2023-08-30 06:29:40,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1054 flow [2023-08-30 06:29:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:29:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:29:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-08-30 06:29:40,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358723958333333 [2023-08-30 06:29:40,238 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-08-30 06:29:40,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-08-30 06:29:40,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:40,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-08-30 06:29:40,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:40,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:40,243 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:40,243 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 325 flow. Second operand 8 states and 1339 transitions. [2023-08-30 06:29:40,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1054 flow [2023-08-30 06:29:40,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 159 transitions, 1051 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 06:29:40,376 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 397 flow [2023-08-30 06:29:40,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-08-30 06:29:40,376 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 23 predicate places. [2023-08-30 06:29:40,376 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 397 flow [2023-08-30 06:29:40,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:40,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:40,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:29:40,384 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 06:29:40,577 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 06:29:40,577 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:29:40,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2041334241, now seen corresponding path program 1 times [2023-08-30 06:29:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:40,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654669681] [2023-08-30 06:29:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:40,578 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 06:29:40,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:40,581 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 06:29:40,585 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 06:29:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:29:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:40,736 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 06:29:40,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:40,882 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 06:29:40,931 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 06:29:40,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:40,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654669681] [2023-08-30 06:29:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654669681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:40,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:29:40,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:29:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223069581] [2023-08-30 06:29:40,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:40,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:29:40,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:29:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:29:42,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 06:29:42,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 397 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:42,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:42,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 06:29:42,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:58,983 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2023-08-30 06:29:58,983 INFO L131 PetriNetUnfolder]: For 340489/340489 co-relation queries the response was YES. [2023-08-30 06:30:00,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563520 conditions, 167828 events. 127811/167828 cut-off events. For 340489/340489 co-relation queries the response was YES. Maximal size of possible extension queue 3515. Compared 999134 event pairs, 63045 based on Foata normal form. 0/161564 useless extension candidates. Maximal degree in co-relation 563479. Up to 101297 conditions per place. [2023-08-30 06:30:00,750 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2023-08-30 06:30:00,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1357 flow [2023-08-30 06:30:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:30:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:30:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1496 transitions. [2023-08-30 06:30:00,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2023-08-30 06:30:00,753 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1496 transitions. [2023-08-30 06:30:00,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1496 transitions. [2023-08-30 06:30:00,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:00,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1496 transitions. [2023-08-30 06:30:00,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.22222222222223) internal successors, (1496), 9 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:00,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:00,759 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:00,759 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 397 flow. Second operand 9 states and 1496 transitions. [2023-08-30 06:30:00,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1357 flow [2023-08-30 06:30:01,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1310 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-30 06:30:01,364 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 436 flow [2023-08-30 06:30:01,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2023-08-30 06:30:01,365 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2023-08-30 06:30:01,365 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 436 flow [2023-08-30 06:30:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:01,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:01,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:30:01,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:01,573 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 06:30:01,573 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:30:01,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:01,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1143151987, now seen corresponding path program 1 times [2023-08-30 06:30:01,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:01,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347741834] [2023-08-30 06:30:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:30:01,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:01,575 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 06:30:01,577 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 06:30:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:30:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:30:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:01,838 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:30:01,838 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:30:01,986 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 06:30:01,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:02,448 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 06:30:02,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:02,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347741834] [2023-08-30 06:30:02,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347741834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:30:02,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:30:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:30:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292179336] [2023-08-30 06:30:02,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:30:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:30:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:30:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:30:04,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 06:30:04,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:04,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:04,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 06:30:04,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:33,719 INFO L130 PetriNetUnfolder]: 201899/260708 cut-off events. [2023-08-30 06:30:33,719 INFO L131 PetriNetUnfolder]: For 534737/534737 co-relation queries the response was YES. [2023-08-30 06:30:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922814 conditions, 260708 events. 201899/260708 cut-off events. For 534737/534737 co-relation queries the response was YES. Maximal size of possible extension queue 4866. Compared 1532061 event pairs, 46503 based on Foata normal form. 25056/285764 useless extension candidates. Maximal degree in co-relation 922771. Up to 86887 conditions per place. [2023-08-30 06:30:37,525 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 183 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2023-08-30 06:30:37,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 200 transitions, 1504 flow [2023-08-30 06:30:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:30:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:30:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1346 transitions. [2023-08-30 06:30:37,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381510416666667 [2023-08-30 06:30:37,529 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1346 transitions. [2023-08-30 06:30:37,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1346 transitions. [2023-08-30 06:30:37,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:37,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1346 transitions. [2023-08-30 06:30:37,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:37,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:37,549 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:37,564 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 436 flow. Second operand 8 states and 1346 transitions. [2023-08-30 06:30:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 200 transitions, 1504 flow [2023-08-30 06:30:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 200 transitions, 1485 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 06:30:39,631 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 520 flow [2023-08-30 06:30:39,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2023-08-30 06:30:39,632 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2023-08-30 06:30:39,632 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 520 flow [2023-08-30 06:30:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:39,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:39,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:30:39,639 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 (22)] Ended with exit code 0 [2023-08-30 06:30:39,833 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 06:30:39,833 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:30:39,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash 378904885, now seen corresponding path program 2 times [2023-08-30 06:30:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:39,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716522978] [2023-08-30 06:30:39,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:30:39,834 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 06:30:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:39,835 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 06:30:39,836 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 06:30:39,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:30:39,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:30:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:30:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:40,085 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:30:40,086 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:30:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:41,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:41,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716522978] [2023-08-30 06:30:41,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716522978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:30:41,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:30:41,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:30:41,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075423443] [2023-08-30 06:30:41,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:30:41,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:30:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:30:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:30:50,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-08-30 06:30:50,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:50,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:50,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-08-30 06:30:50,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:31:26,940 INFO L130 PetriNetUnfolder]: 183763/238130 cut-off events. [2023-08-30 06:31:26,941 INFO L131 PetriNetUnfolder]: For 878235/903610 co-relation queries the response was YES. [2023-08-30 06:31:29,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978910 conditions, 238130 events. 183763/238130 cut-off events. For 878235/903610 co-relation queries the response was YES. Maximal size of possible extension queue 5117. Compared 1435100 event pairs, 69301 based on Foata normal form. 26881/265003 useless extension candidates. Maximal degree in co-relation 978862. Up to 105814 conditions per place. [2023-08-30 06:31:30,451 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 475 selfloop transitions, 24 changer transitions 0/501 dead transitions. [2023-08-30 06:31:30,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 501 transitions, 4014 flow [2023-08-30 06:31:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:31:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:31:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3085 transitions. [2023-08-30 06:31:30,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42283442982456143 [2023-08-30 06:31:30,457 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3085 transitions. [2023-08-30 06:31:30,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3085 transitions. [2023-08-30 06:31:30,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:31:30,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3085 transitions. [2023-08-30 06:31:30,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.3684210526316) internal successors, (3085), 19 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:30,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:30,465 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:30,465 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 520 flow. Second operand 19 states and 3085 transitions. [2023-08-30 06:31:30,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 501 transitions, 4014 flow [2023-08-30 06:31:34,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 501 transitions, 3792 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-30 06:31:34,301 INFO L231 Difference]: Finished difference. Result has 135 places, 87 transitions, 662 flow [2023-08-30 06:31:34,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=662, PETRI_PLACES=135, PETRI_TRANSITIONS=87} [2023-08-30 06:31:34,301 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2023-08-30 06:31:34,301 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 87 transitions, 662 flow [2023-08-30 06:31:34,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:34,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:31:34,302 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:31:34,309 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 06:31:34,503 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 06:31:34,503 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:31:34,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:31:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash -796862084, now seen corresponding path program 3 times [2023-08-30 06:31:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:31:34,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934777259] [2023-08-30 06:31:34,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:31:34,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:31:34,505 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 06:31:34,506 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 06:31:34,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:31:34,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:31:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:31:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:31:34,809 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:31:34,810 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:31:35,106 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 06:31:35,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:31:37,134 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 06:31:37,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:31:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934777259] [2023-08-30 06:31:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934777259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:31:37,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:31:37,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:31:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230330792] [2023-08-30 06:31:37,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:31:37,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:31:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:31:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:31:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:31:51,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-08-30 06:31:51,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 87 transitions, 662 flow. Second operand has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:51,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:31:51,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-08-30 06:31:51,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:33:26,275 INFO L130 PetriNetUnfolder]: 425599/550178 cut-off events. [2023-08-30 06:33:26,276 INFO L131 PetriNetUnfolder]: For 2098057/2156156 co-relation queries the response was YES. [2023-08-30 06:33:31,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290389 conditions, 550178 events. 425599/550178 cut-off events. For 2098057/2156156 co-relation queries the response was YES. Maximal size of possible extension queue 6976. Compared 3370161 event pairs, 304837 based on Foata normal form. 58111/608272 useless extension candidates. Maximal degree in co-relation 2290336. Up to 96633 conditions per place. [2023-08-30 06:33:34,560 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 1092 selfloop transitions, 25 changer transitions 0/1119 dead transitions. [2023-08-30 06:33:34,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1119 transitions, 8909 flow [2023-08-30 06:33:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:33:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:33:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4613 transitions. [2023-08-30 06:33:34,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48052083333333334 [2023-08-30 06:33:34,565 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4613 transitions. [2023-08-30 06:33:34,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4613 transitions. [2023-08-30 06:33:34,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:33:34,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4613 transitions. [2023-08-30 06:33:34,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 184.52) internal successors, (4613), 25 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:34,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:34,576 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:34,576 INFO L175 Difference]: Start difference. First operand has 135 places, 87 transitions, 662 flow. Second operand 25 states and 4613 transitions. [2023-08-30 06:33:34,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 1119 transitions, 8909 flow [2023-08-30 06:34:04,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1119 transitions, 8820 flow, removed 26 selfloop flow, removed 7 redundant places. [2023-08-30 06:34:04,079 INFO L231 Difference]: Finished difference. Result has 153 places, 100 transitions, 756 flow [2023-08-30 06:34:04,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=756, PETRI_PLACES=153, PETRI_TRANSITIONS=100} [2023-08-30 06:34:04,080 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2023-08-30 06:34:04,080 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 100 transitions, 756 flow [2023-08-30 06:34:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:04,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:34:04,081 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:34:04,088 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 06:34:04,281 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 06:34:04,281 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:34:04,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:34:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash 591158824, now seen corresponding path program 2 times [2023-08-30 06:34:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:34:04,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128545702] [2023-08-30 06:34:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:34:04,282 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 06:34:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:34:04,283 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 06:34:04,284 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 06:34:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:34:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:34:04,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:34:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:34:04,566 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:34:04,567 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:34:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:34:04,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:34:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:34:05,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:34:05,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128545702] [2023-08-30 06:34:05,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128545702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:34:05,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:34:05,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:34:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629238341] [2023-08-30 06:34:05,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:34:05,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:34:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:34:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:34:05,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:34:14,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-08-30 06:34:14,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 100 transitions, 756 flow. Second operand has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:14,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:34:14,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-08-30 06:34:14,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:35:38,831 INFO L130 PetriNetUnfolder]: 434799/563292 cut-off events. [2023-08-30 06:35:38,831 INFO L131 PetriNetUnfolder]: For 2186294/2246189 co-relation queries the response was YES. [2023-08-30 06:35:44,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332077 conditions, 563292 events. 434799/563292 cut-off events. For 2186294/2246189 co-relation queries the response was YES. Maximal size of possible extension queue 7695. Compared 3559969 event pairs, 217437 based on Foata normal form. 61733/625011 useless extension candidates. Maximal degree in co-relation 2332025. Up to 352210 conditions per place. [2023-08-30 06:35:47,148 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 488 selfloop transitions, 24 changer transitions 0/514 dead transitions. [2023-08-30 06:35:47,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 4214 flow [2023-08-30 06:35:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:35:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:35:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3076 transitions. [2023-08-30 06:35:47,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160087719298245 [2023-08-30 06:35:47,153 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3076 transitions. [2023-08-30 06:35:47,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3076 transitions. [2023-08-30 06:35:47,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:35:47,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3076 transitions. [2023-08-30 06:35:47,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.89473684210526) internal successors, (3076), 19 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:35:47,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:35:47,162 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:35:47,162 INFO L175 Difference]: Start difference. First operand has 153 places, 100 transitions, 756 flow. Second operand 19 states and 3076 transitions. [2023-08-30 06:35:47,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 4214 flow [2023-08-30 06:36:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 514 transitions, 4136 flow, removed 22 selfloop flow, removed 16 redundant places. [2023-08-30 06:36:35,981 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 847 flow [2023-08-30 06:36:35,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=847, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2023-08-30 06:36:35,982 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 83 predicate places. [2023-08-30 06:36:35,982 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 847 flow [2023-08-30 06:36:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:35,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:35,983 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:35,991 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 06:36:36,183 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 06:36:36,183 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 06:36:36,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash 725096965, now seen corresponding path program 3 times [2023-08-30 06:36:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:36,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024682175] [2023-08-30 06:36:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:36:36,184 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 06:36:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:36,185 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 06:36:36,187 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 06:36:36,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:36:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:36:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:36:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:36,538 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:36:36,538 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:36:36,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 06:36:36,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 06:36:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:36,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-30 06:36:36,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 06:36:37,009 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:36:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:38,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024682175] [2023-08-30 06:36:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024682175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:38,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:36:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 06:36:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490471232] [2023-08-30 06:36:38,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:38,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:36:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:36:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:36:53,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2023-08-30 06:36:53,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 847 flow. Second operand has 21 states, 21 states have (on average 152.23809523809524) internal successors, (3197), 21 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:53,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:53,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2023-08-30 06:36:53,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:38:24,145 INFO L130 PetriNetUnfolder]: 443249/575297 cut-off events. [2023-08-30 06:38:24,145 INFO L131 PetriNetUnfolder]: For 2651667/2713330 co-relation queries the response was YES. [2023-08-30 06:38:29,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532618 conditions, 575297 events. 443249/575297 cut-off events. For 2651667/2713330 co-relation queries the response was YES. Maximal size of possible extension queue 8075. Compared 3639543 event pairs, 234449 based on Foata normal form. 63469/638762 useless extension candidates. Maximal degree in co-relation 2532566. Up to 404383 conditions per place. [2023-08-30 06:38:32,362 INFO L137 encePairwiseOnDemand]: 374/384 looper letters, 692 selfloop transitions, 52 changer transitions 0/746 dead transitions. [2023-08-30 06:38:32,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 746 transitions, 6380 flow [2023-08-30 06:38:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:38:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:38:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4037 transitions. [2023-08-30 06:38:32,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380425347222222 [2023-08-30 06:38:32,368 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4037 transitions. [2023-08-30 06:38:32,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4037 transitions. [2023-08-30 06:38:32,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:38:32,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4037 transitions. [2023-08-30 06:38:32,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.20833333333334) internal successors, (4037), 24 states have internal predecessors, (4037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:32,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:32,376 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:32,376 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 847 flow. Second operand 24 states and 4037 transitions. [2023-08-30 06:38:32,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 746 transitions, 6380 flow Killed by 15