./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 BEFORE --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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:00:57,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:00:57,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:00:57,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:00:57,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:00:57,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:00:57,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:00:57,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:00:57,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:00:57,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:00:57,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:00:57,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:00:57,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:00:57,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:00:57,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:00:57,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:00:57,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:00:57,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:00:57,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:00:57,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:00:57,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:00:57,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:00:57,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:00:57,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:00:57,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:00:57,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:00:57,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:00:57,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:00:57,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:00:57,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:00:57,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:00:57,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:00:57,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:00:57,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:00:57,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:00:57,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:00:57,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:00:57,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:00:57,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:00:57,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:00:57,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:00:57,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:00:57,503 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:00:57,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:00:57,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:00:57,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:00:57,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:00:57,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:00:57,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:00:57,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:00:57,507 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:00:57,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:00:57,508 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:00:57,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:00:57,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:00:57,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:00:57,509 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:00:57,509 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:00:57,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:00:57,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:00:57,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:00:57,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:00:57,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:00:57,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:00:57,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:00:57,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:00:57,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:00:57,511 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:00:57,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:00:57,512 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:00:57,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:00:57,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:00:57,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:00:57,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:00:57,805 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:00:57,805 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:00:57,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-09-01 03:00:58,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:00:59,000 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:00:59,000 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-09-01 03:00:59,006 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e7280e9/7204ebaf761742c68f6e15f6ce3f73e0/FLAG7c4d7ad8b [2023-09-01 03:00:59,018 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e7280e9/7204ebaf761742c68f6e15f6ce3f73e0 [2023-09-01 03:00:59,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:00:59,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:00:59,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:00:59,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:00:59,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:00:59,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:00:59" (1/1) ... [2023-09-01 03:00:59,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e03bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:59, skipping insertion in model container [2023-09-01 03:00:59,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:00:59" (1/1) ... [2023-09-01 03:00:59,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:00:59,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:00:59,179 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] [2023-09-01 03:00:59,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:00:59,203 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) [2023-09-01 03:00:59,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e370c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:59, skipping insertion in model container [2023-09-01 03:00:59,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:00:59,206 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:00:59,207 INFO L158 Benchmark]: Toolchain (without parser) took 186.10ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 38.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:00:59,208 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory is still 36.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:00:59,208 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.37ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 38.7MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:00:59,209 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 36.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.37ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 38.7MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. 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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:01:00,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:01:00,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:01:00,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:01:00,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:01:00,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:01:00,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:01:00,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:01:00,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:01:00,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:01:00,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:01:00,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:01:00,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:01:00,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:01:00,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:01:00,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:01:00,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:01:00,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:01:00,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:01:00,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:01:00,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:01:00,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:01:00,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:01:00,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:01:00,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:01:00,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:01:00,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:01:00,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:01:00,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:01:00,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:01:00,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:01:00,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:01:00,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:01:00,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:01:00,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:01:00,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:01:00,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:01:00,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:01:00,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:01:00,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:01:00,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:01:00,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:01:00,765 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:01:00,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:01:00,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:01:00,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:01:00,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:01:00,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:01:00,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:01:00,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:01:00,769 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:01:00,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:01:00,770 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:01:00,770 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:01:00,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:01:00,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:01:00,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:01:00,771 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:01:00,771 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:01:00,771 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:01:00,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:01:00,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:01:00,772 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:01:00,772 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:01:00,772 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:01:00,772 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:01:00,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:01:00,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:01:00,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:01:00,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:01:00,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:01:00,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:01:00,774 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:01:00,774 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:01:00,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:01:00,774 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:01:00,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:01:00,775 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:01:00,775 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:01:00,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:01:01,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:01:01,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:01:01,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:01:01,084 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:01:01,084 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:01:01,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-09-01 03:01:02,147 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:01:02,334 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:01:02,335 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-09-01 03:01:02,340 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96a98903/5a81484f37d24a1fb79f3c0a6101756c/FLAG2cf67f514 [2023-09-01 03:01:02,350 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96a98903/5a81484f37d24a1fb79f3c0a6101756c [2023-09-01 03:01:02,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:01:02,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:01:02,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:01:02,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:01:02,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:01:02,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6d39f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02, skipping insertion in model container [2023-09-01 03:01:02,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:01:02,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:01:02,523 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] [2023-09-01 03:01:02,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:01:02,541 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:01:02,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:01:02,556 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] [2023-09-01 03:01:02,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:01:02,561 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:01:02,577 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] [2023-09-01 03:01:02,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:01:02,586 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:01:02,586 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:01:02,590 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:01:02,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02 WrapperNode [2023-09-01 03:01:02,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:01:02,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:01:02,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:01:02,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:01:02,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,620 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2023-09-01 03:01:02,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:01:02,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:01:02,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:01:02,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:01:02,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,643 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:01:02,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:01:02,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:01:02,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:01:02,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (1/1) ... [2023-09-01 03:01:02,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:01:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:01:02,686 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) [2023-09-01 03:01:02,707 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 [2023-09-01 03:01:02,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:01:02,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:01:02,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:01:02,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:01:02,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:01:02,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:01:02,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:01:02,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:01:02,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:01:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:01:02,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:01:02,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:01:02,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:01:02,728 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:01:02,811 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:01:02,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:01:03,339 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:01:03,446 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:01:03,447 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:01:03,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:01:03 BoogieIcfgContainer [2023-09-01 03:01:03,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:01:03,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:01:03,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:01:03,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:01:03,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:01:02" (1/3) ... [2023-09-01 03:01:03,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840dab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:01:03, skipping insertion in model container [2023-09-01 03:01:03,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:02" (2/3) ... [2023-09-01 03:01:03,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840dab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:01:03, skipping insertion in model container [2023-09-01 03:01:03,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:01:03" (3/3) ... [2023-09-01 03:01:03,457 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2023-09-01 03:01:03,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:01:03,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-09-01 03:01:03,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:01:03,560 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 03:01:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 200 transitions, 432 flow [2023-09-01 03:01:03,677 INFO L130 PetriNetUnfolder]: 12/196 cut-off events. [2023-09-01 03:01:03,678 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:01:03,682 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. [2023-09-01 03:01:03,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 200 transitions, 432 flow [2023-09-01 03:01:03,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 192 transitions, 408 flow [2023-09-01 03:01:03,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:01:03,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 192 transitions, 408 flow [2023-09-01 03:01:03,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 192 transitions, 408 flow [2023-09-01 03:01:03,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 192 transitions, 408 flow [2023-09-01 03:01:03,748 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2023-09-01 03:01:03,749 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:01:03,750 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. [2023-09-01 03:01:03,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2023-09-01 03:01:21,242 INFO L134 LiptonReduction]: Checked pairs total: 8115 [2023-09-01 03:01:21,242 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 03:01:21,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:01:21,261 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;@23a726ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:01:21,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-09-01 03:01:21,264 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:01:21,264 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:01:21,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:21,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:01:21,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:21,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 26204, now seen corresponding path program 1 times [2023-09-01 03:01:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371174922] [2023-09-01 03:01:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:21,285 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 [2023-09-01 03:01:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:21,290 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) [2023-09-01 03:01:21,292 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 [2023-09-01 03:01:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:21,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:01:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:21,643 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:01:21,644 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 [2023-09-01 03:01:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:21,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:21,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371174922] [2023-09-01 03:01:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371174922] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:21,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:21,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616054599] [2023-09-01 03:01:21,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:21,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:21,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:22,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 384 [2023-09-01 03:01:22,032 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) [2023-09-01 03:01:22,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:22,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 384 [2023-09-01 03:01:22,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:24,110 INFO L130 PetriNetUnfolder]: 18239/23498 cut-off events. [2023-09-01 03:01:24,111 INFO L131 PetriNetUnfolder]: For 408/408 co-relation queries the response was YES. [2023-09-01 03:01:24,136 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. [2023-09-01 03:01:24,257 INFO L137 encePairwiseOnDemand]: 372/384 looper letters, 104 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-09-01 03:01:24,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 482 flow [2023-09-01 03:01:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-09-01 03:01:24,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-09-01 03:01:24,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-09-01 03:01:24,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-09-01 03:01:24,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:24,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-09-01 03:01:24,275 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) [2023-09-01 03:01:24,279 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) [2023-09-01 03:01:24,280 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) [2023-09-01 03:01:24,281 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 620 transitions. [2023-09-01 03:01:24,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 482 flow [2023-09-01 03:01:24,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 450 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 03:01:24,317 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 138 flow [2023-09-01 03:01:24,318 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} [2023-09-01 03:01:24,320 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-09-01 03:01:24,320 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 138 flow [2023-09-01 03:01:24,321 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) [2023-09-01 03:01:24,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:24,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:01:24,331 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 [2023-09-01 03:01:24,528 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 [2023-09-01 03:01:24,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:24,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:24,529 INFO L85 PathProgramCache]: Analyzing trace with hash 26255, now seen corresponding path program 1 times [2023-09-01 03:01:24,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:24,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409738700] [2023-09-01 03:01:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:24,530 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 [2023-09-01 03:01:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:24,532 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) [2023-09-01 03:01:24,534 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 [2023-09-01 03:01:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:01:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:24,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:24,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:24,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409738700] [2023-09-01 03:01:24,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409738700] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:24,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436266797] [2023-09-01 03:01:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:24,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2023-09-01 03:01:24,646 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) [2023-09-01 03:01:24,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:24,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2023-09-01 03:01:24,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:25,487 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2023-09-01 03:01:25,487 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:01:25,492 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. [2023-09-01 03:01:25,524 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-09-01 03:01:25,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 252 flow [2023-09-01 03:01:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-09-01 03:01:25,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835069444444444 [2023-09-01 03:01:25,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-09-01 03:01:25,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-09-01 03:01:25,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:25,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-09-01 03:01:25,527 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) [2023-09-01 03:01:25,529 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) [2023-09-01 03:01:25,530 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) [2023-09-01 03:01:25,530 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 557 transitions. [2023-09-01 03:01:25,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 252 flow [2023-09-01 03:01:25,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:25,531 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 148 flow [2023-09-01 03:01:25,532 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} [2023-09-01 03:01:25,532 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-09-01 03:01:25,532 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 148 flow [2023-09-01 03:01:25,533 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) [2023-09-01 03:01:25,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:25,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:01:25,543 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 [2023-09-01 03:01:25,739 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 [2023-09-01 03:01:25,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:25,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 26202, now seen corresponding path program 1 times [2023-09-01 03:01:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:25,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594600683] [2023-09-01 03:01:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:25,744 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 [2023-09-01 03:01:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:25,747 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) [2023-09-01 03:01:25,750 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 [2023-09-01 03:01:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:01:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:25,888 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:01:25,889 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 [2023-09-01 03:01:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:25,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:25,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:25,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594600683] [2023-09-01 03:01:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594600683] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:25,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:25,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:25,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337690812] [2023-09-01 03:01:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:25,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:25,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:26,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:01:26,027 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) [2023-09-01 03:01:26,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:26,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:01:26,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:26,713 INFO L130 PetriNetUnfolder]: 9120/11750 cut-off events. [2023-09-01 03:01:26,713 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:01:26,724 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. [2023-09-01 03:01:26,759 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:01:26,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 254 flow [2023-09-01 03:01:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-09-01 03:01:26,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-09-01 03:01:26,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-09-01 03:01:26,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-09-01 03:01:26,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:26,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-09-01 03:01:26,763 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) [2023-09-01 03:01:26,765 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) [2023-09-01 03:01:26,765 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) [2023-09-01 03:01:26,765 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 148 flow. Second operand 3 states and 540 transitions. [2023-09-01 03:01:26,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 254 flow [2023-09-01 03:01:26,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 248 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:01:26,767 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 142 flow [2023-09-01 03:01:26,767 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} [2023-09-01 03:01:26,768 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -13 predicate places. [2023-09-01 03:01:26,768 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 142 flow [2023-09-01 03:01:26,768 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) [2023-09-01 03:01:26,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:26,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:01:26,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:26,979 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 [2023-09-01 03:01:26,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:26,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:26,980 INFO L85 PathProgramCache]: Analyzing trace with hash 814740, now seen corresponding path program 1 times [2023-09-01 03:01:26,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:26,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698872040] [2023-09-01 03:01:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:26,981 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 [2023-09-01 03:01:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:26,982 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) [2023-09-01 03:01:26,982 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 [2023-09-01 03:01:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:01:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:27,141 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-09-01 03:01:27,141 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 [2023-09-01 03:01:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:27,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:27,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698872040] [2023-09-01 03:01:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698872040] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:27,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230183084] [2023-09-01 03:01:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:27,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:01:27,348 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) [2023-09-01 03:01:27,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:27,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:01:27,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:28,106 INFO L130 PetriNetUnfolder]: 7644/9913 cut-off events. [2023-09-01 03:01:28,106 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:01:28,115 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. [2023-09-01 03:01:28,164 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 51 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-09-01 03:01:28,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 240 flow [2023-09-01 03:01:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-09-01 03:01:28,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678819444444444 [2023-09-01 03:01:28,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-09-01 03:01:28,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-09-01 03:01:28,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:28,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-09-01 03:01:28,168 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) [2023-09-01 03:01:28,169 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) [2023-09-01 03:01:28,170 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) [2023-09-01 03:01:28,170 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 142 flow. Second operand 3 states and 539 transitions. [2023-09-01 03:01:28,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 240 flow [2023-09-01 03:01:28,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:28,173 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 137 flow [2023-09-01 03:01:28,173 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} [2023-09-01 03:01:28,174 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-09-01 03:01:28,174 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 137 flow [2023-09-01 03:01:28,175 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) [2023-09-01 03:01:28,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:28,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:01:28,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:28,382 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 [2023-09-01 03:01:28,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:28,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 814739, now seen corresponding path program 1 times [2023-09-01 03:01:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:28,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996247328] [2023-09-01 03:01:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:28,383 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 [2023-09-01 03:01:28,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:28,384 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) [2023-09-01 03:01:28,386 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 [2023-09-01 03:01:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:01:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:28,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:28,614 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-09-01 03:01:28,615 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 [2023-09-01 03:01:28,653 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-09-01 03:01:28,653 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 [2023-09-01 03:01:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:28,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:28,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:28,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996247328] [2023-09-01 03:01:28,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996247328] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:28,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:28,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186732243] [2023-09-01 03:01:28,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:28,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2023-09-01 03:01:28,915 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) [2023-09-01 03:01:28,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:28,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2023-09-01 03:01:28,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:29,501 INFO L130 PetriNetUnfolder]: 6168/8076 cut-off events. [2023-09-01 03:01:29,501 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:01:29,507 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. [2023-09-01 03:01:29,537 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 49 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 03:01:29,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 231 flow [2023-09-01 03:01:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-09-01 03:01:29,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2023-09-01 03:01:29,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-09-01 03:01:29,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-09-01 03:01:29,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:29,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-09-01 03:01:29,540 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) [2023-09-01 03:01:29,542 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) [2023-09-01 03:01:29,543 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) [2023-09-01 03:01:29,543 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 137 flow. Second operand 3 states and 543 transitions. [2023-09-01 03:01:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 231 flow [2023-09-01 03:01:29,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:29,544 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 132 flow [2023-09-01 03:01:29,544 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} [2023-09-01 03:01:29,545 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-09-01 03:01:29,545 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 132 flow [2023-09-01 03:01:29,545 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) [2023-09-01 03:01:29,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:29,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:01:29,552 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 (6)] Ended with exit code 0 [2023-09-01 03:01:29,752 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 [2023-09-01 03:01:29,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:29,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 814689, now seen corresponding path program 1 times [2023-09-01 03:01:29,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:29,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641444253] [2023-09-01 03:01:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:29,754 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 [2023-09-01 03:01:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:29,755 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) [2023-09-01 03:01:29,756 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 [2023-09-01 03:01:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:01:29,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:29,948 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:01:29,948 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 [2023-09-01 03:01:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:30,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:30,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641444253] [2023-09-01 03:01:30,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641444253] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:30,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:30,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:01:30,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132794791] [2023-09-01 03:01:30,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:30,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:01:30,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:01:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:01:30,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-09-01 03:01:30,907 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) [2023-09-01 03:01:30,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:30,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-09-01 03:01:30,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:32,103 INFO L130 PetriNetUnfolder]: 12337/16153 cut-off events. [2023-09-01 03:01:32,104 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 03:01:32,136 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. [2023-09-01 03:01:32,197 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 94 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2023-09-01 03:01:32,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 456 flow [2023-09-01 03:01:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:01:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:01:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1046 transitions. [2023-09-01 03:01:32,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539930555555556 [2023-09-01 03:01:32,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1046 transitions. [2023-09-01 03:01:32,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1046 transitions. [2023-09-01 03:01:32,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:32,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1046 transitions. [2023-09-01 03:01:32,207 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) [2023-09-01 03:01:32,210 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) [2023-09-01 03:01:32,211 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) [2023-09-01 03:01:32,211 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 132 flow. Second operand 6 states and 1046 transitions. [2023-09-01 03:01:32,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 456 flow [2023-09-01 03:01:32,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:32,213 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 189 flow [2023-09-01 03:01:32,214 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} [2023-09-01 03:01:32,214 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-09-01 03:01:32,214 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 189 flow [2023-09-01 03:01:32,215 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) [2023-09-01 03:01:32,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:32,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:01:32,223 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 [2023-09-01 03:01:32,423 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 [2023-09-01 03:01:32,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:32,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 782982615, now seen corresponding path program 1 times [2023-09-01 03:01:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:32,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990267548] [2023-09-01 03:01:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:32,424 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 [2023-09-01 03:01:32,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:32,425 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) [2023-09-01 03:01:32,427 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 [2023-09-01 03:01:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:01:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:32,588 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-09-01 03:01:32,589 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 [2023-09-01 03:01:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:32,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:32,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990267548] [2023-09-01 03:01:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990267548] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:32,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:32,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398200576] [2023-09-01 03:01:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:32,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:01:32,923 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) [2023-09-01 03:01:32,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:32,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:01:32,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:33,843 INFO L130 PetriNetUnfolder]: 11953/15637 cut-off events. [2023-09-01 03:01:33,843 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-09-01 03:01:33,861 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. [2023-09-01 03:01:33,906 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 03:01:33,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 291 flow [2023-09-01 03:01:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-09-01 03:01:33,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2023-09-01 03:01:33,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-09-01 03:01:33,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-09-01 03:01:33,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:33,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-09-01 03:01:33,909 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) [2023-09-01 03:01:33,911 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) [2023-09-01 03:01:33,911 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) [2023-09-01 03:01:33,911 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 189 flow. Second operand 3 states and 535 transitions. [2023-09-01 03:01:33,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 291 flow [2023-09-01 03:01:33,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:33,912 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 173 flow [2023-09-01 03:01:33,913 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} [2023-09-01 03:01:33,913 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2023-09-01 03:01:33,913 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 173 flow [2023-09-01 03:01:33,913 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) [2023-09-01 03:01:33,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:33,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:01:33,932 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 [2023-09-01 03:01:34,114 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 [2023-09-01 03:01:34,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:34,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash 782982613, now seen corresponding path program 1 times [2023-09-01 03:01:34,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:34,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949475764] [2023-09-01 03:01:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:34,115 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 [2023-09-01 03:01:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:34,115 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) [2023-09-01 03:01:34,116 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 [2023-09-01 03:01:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:01:34,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:34,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:34,314 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-09-01 03:01:34,314 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 [2023-09-01 03:01:34,331 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:01:34,331 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 [2023-09-01 03:01:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:34,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:34,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:34,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949475764] [2023-09-01 03:01:34,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949475764] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:34,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:34,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:01:34,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899283255] [2023-09-01 03:01:34,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:34,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:01:34,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:01:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:01:37,307 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] [2023-09-01 03:01:39,398 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] [2023-09-01 03:01:39,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2023-09-01 03:01:39,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:39,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:39,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2023-09-01 03:01:39,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:41,090 INFO L130 PetriNetUnfolder]: 11569/15121 cut-off events. [2023-09-01 03:01:41,090 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 03:01:41,109 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. [2023-09-01 03:01:41,162 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 90 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-09-01 03:01:41,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 453 flow [2023-09-01 03:01:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:01:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:01:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 848 transitions. [2023-09-01 03:01:41,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-09-01 03:01:41,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 848 transitions. [2023-09-01 03:01:41,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 848 transitions. [2023-09-01 03:01:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 848 transitions. [2023-09-01 03:01:41,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:41,170 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) [2023-09-01 03:01:41,171 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) [2023-09-01 03:01:41,171 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 173 flow. Second operand 5 states and 848 transitions. [2023-09-01 03:01:41,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 453 flow [2023-09-01 03:01:41,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:41,175 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 174 flow [2023-09-01 03:01:41,175 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} [2023-09-01 03:01:41,177 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-09-01 03:01:41,178 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 174 flow [2023-09-01 03:01:41,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:41,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:41,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:01:41,190 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 [2023-09-01 03:01:41,387 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 [2023-09-01 03:01:41,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:41,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 782982390, now seen corresponding path program 1 times [2023-09-01 03:01:41,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:41,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804559867] [2023-09-01 03:01:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:41,392 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 [2023-09-01 03:01:41,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:41,393 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) [2023-09-01 03:01:41,398 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 [2023-09-01 03:01:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:01:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:41,564 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:01:41,564 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 [2023-09-01 03:01:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:41,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:41,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:41,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804559867] [2023-09-01 03:01:41,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804559867] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:41,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:41,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:01:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213769607] [2023-09-01 03:01:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:01:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:01:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:01:41,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 384 [2023-09-01 03:01:41,776 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) [2023-09-01 03:01:41,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:41,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 384 [2023-09-01 03:01:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:42,375 INFO L130 PetriNetUnfolder]: 6411/8489 cut-off events. [2023-09-01 03:01:42,376 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-09-01 03:01:42,385 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. [2023-09-01 03:01:42,402 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-09-01 03:01:42,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 51 transitions, 260 flow [2023-09-01 03:01:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:01:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:01:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-09-01 03:01:42,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342447916666667 [2023-09-01 03:01:42,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-09-01 03:01:42,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-09-01 03:01:42,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:42,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-09-01 03:01:42,406 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) [2023-09-01 03:01:42,407 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) [2023-09-01 03:01:42,407 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) [2023-09-01 03:01:42,408 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 174 flow. Second operand 4 states and 667 transitions. [2023-09-01 03:01:42,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 51 transitions, 260 flow [2023-09-01 03:01:42,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:01:42,409 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 167 flow [2023-09-01 03:01:42,409 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} [2023-09-01 03:01:42,409 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-09-01 03:01:42,410 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 167 flow [2023-09-01 03:01:42,410 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) [2023-09-01 03:01:42,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:42,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:01:42,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-09-01 03:01:42,617 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 [2023-09-01 03:01:42,618 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:42,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 782982391, now seen corresponding path program 1 times [2023-09-01 03:01:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:42,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207073151] [2023-09-01 03:01:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:42,618 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 [2023-09-01 03:01:42,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:42,619 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) [2023-09-01 03:01:42,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:01:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:42,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:01:42,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:42,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:42,788 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 [2023-09-01 03:01:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:42,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:42,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207073151] [2023-09-01 03:01:42,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207073151] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:42,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:42,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:01:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865615078] [2023-09-01 03:01:42,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:42,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:01:42,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:01:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:01:43,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 384 [2023-09-01 03:01:43,481 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) [2023-09-01 03:01:43,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:43,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 384 [2023-09-01 03:01:43,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:44,220 INFO L130 PetriNetUnfolder]: 6411/8483 cut-off events. [2023-09-01 03:01:44,220 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 03:01:44,231 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. [2023-09-01 03:01:44,252 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-09-01 03:01:44,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 431 flow [2023-09-01 03:01:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:01:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:01:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1179 transitions. [2023-09-01 03:01:44,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43861607142857145 [2023-09-01 03:01:44,255 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1179 transitions. [2023-09-01 03:01:44,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1179 transitions. [2023-09-01 03:01:44,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:44,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1179 transitions. [2023-09-01 03:01:44,257 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) [2023-09-01 03:01:44,260 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) [2023-09-01 03:01:44,260 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) [2023-09-01 03:01:44,260 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 167 flow. Second operand 7 states and 1179 transitions. [2023-09-01 03:01:44,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 431 flow [2023-09-01 03:01:44,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:01:44,262 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 181 flow [2023-09-01 03:01:44,262 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} [2023-09-01 03:01:44,262 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2023-09-01 03:01:44,263 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 181 flow [2023-09-01 03:01:44,263 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) [2023-09-01 03:01:44,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:44,263 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:01:44,272 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 [2023-09-01 03:01:44,470 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 [2023-09-01 03:01:44,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:44,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1497055332, now seen corresponding path program 2 times [2023-09-01 03:01:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380494395] [2023-09-01 03:01:44,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:01:44,471 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 [2023-09-01 03:01:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:44,472 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) [2023-09-01 03:01:44,474 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 [2023-09-01 03:01:44,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:01:44,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:01:44,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:44,688 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:01:44,689 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 [2023-09-01 03:01:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:44,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:45,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:45,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380494395] [2023-09-01 03:01:45,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380494395] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:45,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:45,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:01:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046789893] [2023-09-01 03:01:45,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:45,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:01:45,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:01:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:01:48,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 384 [2023-09-01 03:01:48,217 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) [2023-09-01 03:01:48,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:48,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 384 [2023-09-01 03:01:48,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:54,388 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2023-09-01 03:01:54,388 INFO L131 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2023-09-01 03:01:54,435 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. [2023-09-01 03:01:54,519 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 353 selfloop transitions, 12 changer transitions 0/366 dead transitions. [2023-09-01 03:01:54,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 366 transitions, 1673 flow [2023-09-01 03:01:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:01:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:01:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2267 transitions. [2023-09-01 03:01:54,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919704861111111 [2023-09-01 03:01:54,524 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2267 transitions. [2023-09-01 03:01:54,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2267 transitions. [2023-09-01 03:01:54,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:54,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2267 transitions. [2023-09-01 03:01:54,528 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) [2023-09-01 03:01:54,532 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) [2023-09-01 03:01:54,533 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) [2023-09-01 03:01:54,533 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 181 flow. Second operand 12 states and 2267 transitions. [2023-09-01 03:01:54,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 366 transitions, 1673 flow [2023-09-01 03:01:54,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 366 transitions, 1656 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 03:01:54,537 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 265 flow [2023-09-01 03:01:54,537 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} [2023-09-01 03:01:54,538 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-09-01 03:01:54,538 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 265 flow [2023-09-01 03:01:54,538 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) [2023-09-01 03:01:54,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:54,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:54,546 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 (12)] Ended with exit code 0 [2023-09-01 03:01:54,746 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 [2023-09-01 03:01:54,746 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:54,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash 827034521, now seen corresponding path program 1 times [2023-09-01 03:01:54,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:54,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448025950] [2023-09-01 03:01:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:54,747 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 [2023-09-01 03:01:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:54,748 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) [2023-09-01 03:01:54,748 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 [2023-09-01 03:01:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:01:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:54,915 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-09-01 03:01:54,915 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 [2023-09-01 03:01:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:55,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:55,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448025950] [2023-09-01 03:01:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448025950] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:55,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671661692] [2023-09-01 03:01:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:55,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:55,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:01:55,261 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) [2023-09-01 03:01:55,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:55,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:01:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:58,056 INFO L130 PetriNetUnfolder]: 28244/37256 cut-off events. [2023-09-01 03:01:58,056 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-09-01 03:01:58,167 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. [2023-09-01 03:01:58,287 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 03:01:58,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 55 transitions, 369 flow [2023-09-01 03:01:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-09-01 03:01:58,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-09-01 03:01:58,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-09-01 03:01:58,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-09-01 03:01:58,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:58,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-09-01 03:01:58,301 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) [2023-09-01 03:01:58,302 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) [2023-09-01 03:01:58,302 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) [2023-09-01 03:01:58,302 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 265 flow. Second operand 3 states and 528 transitions. [2023-09-01 03:01:58,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 55 transitions, 369 flow [2023-09-01 03:01:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 55 transitions, 344 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:01:58,305 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 238 flow [2023-09-01 03:01:58,305 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} [2023-09-01 03:01:58,305 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-09-01 03:01:58,306 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 238 flow [2023-09-01 03:01:58,306 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) [2023-09-01 03:01:58,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:58,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:58,316 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 [2023-09-01 03:01:58,506 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 [2023-09-01 03:01:58,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:01:58,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash 827034520, now seen corresponding path program 1 times [2023-09-01 03:01:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:58,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955049728] [2023-09-01 03:01:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:58,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:58,509 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) [2023-09-01 03:01:58,511 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 [2023-09-01 03:01:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:01:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:58,755 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2023-09-01 03:01:58,755 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 [2023-09-01 03:01:58,766 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 [2023-09-01 03:01:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:58,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:59,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:59,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955049728] [2023-09-01 03:01:59,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955049728] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:59,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:59,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:01:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096003989] [2023-09-01 03:01:59,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:59,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:01:59,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:01:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:01:59,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:01:59,706 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) [2023-09-01 03:01:59,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:59,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:01:59,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:03,535 INFO L130 PetriNetUnfolder]: 27650/36365 cut-off events. [2023-09-01 03:02:03,535 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-09-01 03:02:03,604 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. [2023-09-01 03:02:03,690 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 83 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-09-01 03:02:03,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 482 flow [2023-09-01 03:02:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:02:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:02:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-09-01 03:02:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-09-01 03:02:03,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-09-01 03:02:03,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-09-01 03:02:03,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:03,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-09-01 03:02:03,694 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) [2023-09-01 03:02:03,705 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) [2023-09-01 03:02:03,707 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) [2023-09-01 03:02:03,707 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 238 flow. Second operand 5 states and 844 transitions. [2023-09-01 03:02:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 482 flow [2023-09-01 03:02:03,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:02:03,710 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 239 flow [2023-09-01 03:02:03,710 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} [2023-09-01 03:02:03,711 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-09-01 03:02:03,711 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 239 flow [2023-09-01 03:02:03,711 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) [2023-09-01 03:02:03,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:03,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:03,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:02:03,912 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 [2023-09-01 03:02:03,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:02:03,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash 826824309, now seen corresponding path program 1 times [2023-09-01 03:02:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318272801] [2023-09-01 03:02:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:03,913 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 [2023-09-01 03:02:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:03,914 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) [2023-09-01 03:02:03,916 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 [2023-09-01 03:02:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:02:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:04,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:04,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:04,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318272801] [2023-09-01 03:02:04,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318272801] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:04,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:04,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:02:04,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970720736] [2023-09-01 03:02:04,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:02:04,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:02:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:02:04,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-09-01 03:02:04,205 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) [2023-09-01 03:02:04,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:04,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-09-01 03:02:04,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:08,393 INFO L130 PetriNetUnfolder]: 41933/54851 cut-off events. [2023-09-01 03:02:08,393 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-09-01 03:02:08,527 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. [2023-09-01 03:02:08,704 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 91 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-09-01 03:02:08,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 533 flow [2023-09-01 03:02:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:02:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:02:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2023-09-01 03:02:08,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46041666666666664 [2023-09-01 03:02:08,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2023-09-01 03:02:08,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2023-09-01 03:02:08,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:08,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2023-09-01 03:02:08,708 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) [2023-09-01 03:02:08,710 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) [2023-09-01 03:02:08,710 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) [2023-09-01 03:02:08,710 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 239 flow. Second operand 5 states and 884 transitions. [2023-09-01 03:02:08,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 533 flow [2023-09-01 03:02:08,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:02:08,713 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 270 flow [2023-09-01 03:02:08,714 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} [2023-09-01 03:02:08,714 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-09-01 03:02:08,715 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 270 flow [2023-09-01 03:02:08,715 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) [2023-09-01 03:02:08,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:08,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:08,733 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 [2023-09-01 03:02:08,923 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 [2023-09-01 03:02:08,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:02:08,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -138246400, now seen corresponding path program 1 times [2023-09-01 03:02:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872127650] [2023-09-01 03:02:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:08,925 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 [2023-09-01 03:02:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:08,926 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) [2023-09-01 03:02:08,928 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 (16)] Waiting until timeout for monitored process [2023-09-01 03:02:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:02:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:09,171 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:02:09,171 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 [2023-09-01 03:02:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:09,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:02:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:09,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872127650] [2023-09-01 03:02:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872127650] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:02:09,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:02:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:02:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334292355] [2023-09-01 03:02:09,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:02:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:02:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:02:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:02:11,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:02:11,858 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) [2023-09-01 03:02:11,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:11,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:02:11,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:19,248 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2023-09-01 03:02:19,248 INFO L131 PetriNetUnfolder]: For 18379/18379 co-relation queries the response was YES. [2023-09-01 03:02:19,485 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. [2023-09-01 03:02:19,721 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-09-01 03:02:19,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 772 flow [2023-09-01 03:02:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:02:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:02:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1355 transitions. [2023-09-01 03:02:19,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410807291666667 [2023-09-01 03:02:19,726 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1355 transitions. [2023-09-01 03:02:19,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1355 transitions. [2023-09-01 03:02:19,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:19,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1355 transitions. [2023-09-01 03:02:19,729 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) [2023-09-01 03:02:19,731 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) [2023-09-01 03:02:19,732 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) [2023-09-01 03:02:19,732 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 270 flow. Second operand 8 states and 1355 transitions. [2023-09-01 03:02:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 772 flow [2023-09-01 03:02:19,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 764 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:02:19,745 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 337 flow [2023-09-01 03:02:19,746 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} [2023-09-01 03:02:19,746 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-09-01 03:02:19,746 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 337 flow [2023-09-01 03:02:19,747 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) [2023-09-01 03:02:19,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:19,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:19,758 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 [2023-09-01 03:02:19,958 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 [2023-09-01 03:02:19,959 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:02:19,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 211056040, now seen corresponding path program 1 times [2023-09-01 03:02:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888637526] [2023-09-01 03:02:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:19,969 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 [2023-09-01 03:02:19,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:19,970 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) [2023-09-01 03:02:19,972 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 [2023-09-01 03:02:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:20,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:02:20,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:20,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:20,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:20,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888637526] [2023-09-01 03:02:20,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888637526] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:20,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:20,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:02:20,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581822756] [2023-09-01 03:02:20,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:20,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:02:20,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:20,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:02:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:02:20,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-09-01 03:02:20,292 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) [2023-09-01 03:02:20,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:20,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-09-01 03:02:20,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:29,987 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2023-09-01 03:02:29,988 INFO L131 PetriNetUnfolder]: For 109206/109260 co-relation queries the response was YES. [2023-09-01 03:02:30,455 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. [2023-09-01 03:02:30,888 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-09-01 03:02:30,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 710 flow [2023-09-01 03:02:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:02:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:02:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-09-01 03:02:30,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2023-09-01 03:02:30,890 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-09-01 03:02:30,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-09-01 03:02:30,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:30,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-09-01 03:02:30,892 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) [2023-09-01 03:02:30,893 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) [2023-09-01 03:02:30,894 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) [2023-09-01 03:02:30,894 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 337 flow. Second operand 5 states and 882 transitions. [2023-09-01 03:02:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 710 flow [2023-09-01 03:02:31,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 683 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 03:02:31,129 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 340 flow [2023-09-01 03:02:31,129 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} [2023-09-01 03:02:31,130 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-09-01 03:02:31,130 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 340 flow [2023-09-01 03:02:31,130 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) [2023-09-01 03:02:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:31,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:31,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:02:31,339 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 [2023-09-01 03:02:31,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:02:31,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash 211245344, now seen corresponding path program 1 times [2023-09-01 03:02:31,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:31,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599063831] [2023-09-01 03:02:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:31,340 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 [2023-09-01 03:02:31,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:31,341 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) [2023-09-01 03:02:31,341 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 [2023-09-01 03:02:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:02:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:31,585 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:02:31,585 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 [2023-09-01 03:02:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:31,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:02:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:31,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:31,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599063831] [2023-09-01 03:02:31,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599063831] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:02:31,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:02:31,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:02:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751733735] [2023-09-01 03:02:31,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:02:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:02:31,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:02:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:02:32,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:02:32,587 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) [2023-09-01 03:02:32,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:32,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:02:32,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:41,484 INFO L130 PetriNetUnfolder]: 75431/97547 cut-off events. [2023-09-01 03:02:41,484 INFO L131 PetriNetUnfolder]: For 102564/102564 co-relation queries the response was YES. [2023-09-01 03:02:41,944 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. [2023-09-01 03:02:42,266 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 99 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-09-01 03:02:42,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 704 flow [2023-09-01 03:02:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:02:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:02:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 840 transitions. [2023-09-01 03:02:42,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-09-01 03:02:42,269 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 840 transitions. [2023-09-01 03:02:42,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 840 transitions. [2023-09-01 03:02:42,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:42,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 840 transitions. [2023-09-01 03:02:42,270 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) [2023-09-01 03:02:42,272 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) [2023-09-01 03:02:42,272 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) [2023-09-01 03:02:42,272 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 340 flow. Second operand 5 states and 840 transitions. [2023-09-01 03:02:42,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 704 flow [2023-09-01 03:02:42,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:02:42,480 INFO L231 Difference]: Finished difference. Result has 92 places, 61 transitions, 332 flow [2023-09-01 03:02:42,480 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} [2023-09-01 03:02:42,481 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-09-01 03:02:42,481 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 332 flow [2023-09-01 03:02:42,481 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) [2023-09-01 03:02:42,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:42,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:42,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:02:42,687 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 [2023-09-01 03:02:42,687 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:02:42,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 211245343, now seen corresponding path program 1 times [2023-09-01 03:02:42,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957265267] [2023-09-01 03:02:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:42,688 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 [2023-09-01 03:02:42,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:42,689 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) [2023-09-01 03:02:42,690 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 [2023-09-01 03:02:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:02:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:42,885 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-09-01 03:02:42,886 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 [2023-09-01 03:02:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:42,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:42,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:42,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957265267] [2023-09-01 03:02:42,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957265267] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:42,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:02:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298908069] [2023-09-01 03:02:42,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:42,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:02:42,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:02:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:02:42,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 384 [2023-09-01 03:02:42,996 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) [2023-09-01 03:02:42,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:42,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 384 [2023-09-01 03:02:42,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:51,156 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2023-09-01 03:02:51,156 INFO L131 PetriNetUnfolder]: For 84618/84618 co-relation queries the response was YES. [2023-09-01 03:02:51,659 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. [2023-09-01 03:02:52,034 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:02:52,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 444 flow [2023-09-01 03:02:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:02:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:02:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-09-01 03:02:52,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2023-09-01 03:02:52,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-09-01 03:02:52,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-09-01 03:02:52,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:52,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-09-01 03:02:52,037 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) [2023-09-01 03:02:52,038 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) [2023-09-01 03:02:52,039 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) [2023-09-01 03:02:52,039 INFO L175 Difference]: Start difference. First operand has 92 places, 61 transitions, 332 flow. Second operand 3 states and 513 transitions. [2023-09-01 03:02:52,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 444 flow [2023-09-01 03:02:52,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:02:52,169 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 325 flow [2023-09-01 03:02:52,170 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} [2023-09-01 03:02:52,170 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2023-09-01 03:02:52,170 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 325 flow [2023-09-01 03:02:52,170 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) [2023-09-01 03:02:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:52,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:52,181 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 [2023-09-01 03:02:52,371 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 [2023-09-01 03:02:52,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:02:52,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2047193718, now seen corresponding path program 1 times [2023-09-01 03:02:52,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:52,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614096204] [2023-09-01 03:02:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:52,372 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 [2023-09-01 03:02:52,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:52,373 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) [2023-09-01 03:02:52,377 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 [2023-09-01 03:02:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:02:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:52,610 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:02:52,611 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 [2023-09-01 03:02:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:52,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:02:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:53,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:53,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614096204] [2023-09-01 03:02:53,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614096204] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:02:53,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:02:53,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:02:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890238705] [2023-09-01 03:02:53,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:02:53,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:02:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:02:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:02:55,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:02:55,340 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) [2023-09-01 03:02:55,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:55,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:02:55,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:07,568 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2023-09-01 03:03:07,568 INFO L131 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2023-09-01 03:03:08,156 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. [2023-09-01 03:03:08,584 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2023-09-01 03:03:08,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1054 flow [2023-09-01 03:03:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:03:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:03:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-09-01 03:03:08,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358723958333333 [2023-09-01 03:03:08,587 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-09-01 03:03:08,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-09-01 03:03:08,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:08,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-09-01 03:03:08,589 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) [2023-09-01 03:03:08,591 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) [2023-09-01 03:03:08,591 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) [2023-09-01 03:03:08,592 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 325 flow. Second operand 8 states and 1339 transitions. [2023-09-01 03:03:08,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1054 flow [2023-09-01 03:03:08,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 159 transitions, 1051 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:08,732 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 397 flow [2023-09-01 03:03:08,732 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} [2023-09-01 03:03:08,732 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 23 predicate places. [2023-09-01 03:03:08,732 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 397 flow [2023-09-01 03:03:08,733 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) [2023-09-01 03:03:08,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:08,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:03:08,740 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 [2023-09-01 03:03:08,933 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 [2023-09-01 03:03:08,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:08,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2041334241, now seen corresponding path program 1 times [2023-09-01 03:03:08,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:08,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012916732] [2023-09-01 03:03:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:08,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:03:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:08,935 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) [2023-09-01 03:03:08,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:03:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:03:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:09,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:09,210 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 [2023-09-01 03:03:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:09,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:09,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012916732] [2023-09-01 03:03:09,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012916732] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:09,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:09,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:03:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705339270] [2023-09-01 03:03:09,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:09,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:03:09,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:03:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:03:10,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:03:10,959 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) [2023-09-01 03:03:10,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:10,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:03:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:27,483 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2023-09-01 03:03:27,483 INFO L131 PetriNetUnfolder]: For 340489/340489 co-relation queries the response was YES. [2023-09-01 03:03:28,658 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. [2023-09-01 03:03:29,571 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2023-09-01 03:03:29,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1357 flow [2023-09-01 03:03:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:03:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:03:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1496 transitions. [2023-09-01 03:03:29,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2023-09-01 03:03:29,575 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1496 transitions. [2023-09-01 03:03:29,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1496 transitions. [2023-09-01 03:03:29,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:29,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1496 transitions. [2023-09-01 03:03:29,578 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) [2023-09-01 03:03:29,581 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) [2023-09-01 03:03:29,581 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) [2023-09-01 03:03:29,582 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 397 flow. Second operand 9 states and 1496 transitions. [2023-09-01 03:03:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1357 flow [2023-09-01 03:03:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1310 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-09-01 03:03:30,434 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 436 flow [2023-09-01 03:03:30,434 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} [2023-09-01 03:03:30,434 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2023-09-01 03:03:30,434 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 436 flow [2023-09-01 03:03:30,435 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) [2023-09-01 03:03:30,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:30,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:03:30,445 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 [2023-09-01 03:03:30,635 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 [2023-09-01 03:03:30,635 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:30,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1143151987, now seen corresponding path program 1 times [2023-09-01 03:03:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:30,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129239463] [2023-09-01 03:03:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:30,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:03:30,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:30,637 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) [2023-09-01 03:03:30,639 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 [2023-09-01 03:03:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:03:30,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:30,863 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:03:30,863 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 [2023-09-01 03:03:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:30,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:31,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:31,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129239463] [2023-09-01 03:03:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129239463] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:31,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:03:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461028168] [2023-09-01 03:03:31,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:31,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:03:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:03:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:03:33,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:03:33,945 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) [2023-09-01 03:03:33,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:33,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:03:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand