./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --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 01:31:17,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:31:17,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:31:17,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:31:17,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:31:17,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:31:17,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:31:17,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:31:17,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:31:17,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:31:17,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:31:17,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:31:17,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:31:17,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:31:17,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:31:17,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:31:17,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:31:17,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:31:17,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:31:17,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:31:17,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:31:17,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:31:17,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:31:17,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:31:17,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:31:17,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:31:17,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:31:17,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:31:17,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:31:17,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:31:17,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:31:17,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:31:17,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:31:17,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:31:17,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:31:17,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:31:17,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:31:17,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:31:17,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:31:17,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:31:17,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:31:17,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:31:17,535 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:31:17,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:31:17,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:31:17,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:31:17,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:31:17,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:31:17,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:31:17,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:31:17,538 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:31:17,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:31:17,539 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:31:17,539 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:31:17,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:31:17,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:31:17,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:31:17,540 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:31:17,540 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:31:17,540 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:31:17,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:31:17,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:31:17,541 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:31:17,541 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:31:17,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:31:17,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:31:17,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:31:17,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:31:17,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:31:17,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:31:17,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:31:17,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:31:17,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:31:17,543 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:31:17,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:31:17,544 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:31:17,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:31:17,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:31:17,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:31:17,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:31:17,867 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:31:17,867 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:31:17,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-09-01 01:31:18,925 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:31:19,148 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:31:19,149 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-09-01 01:31:19,153 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69de41f57/cc1ba39407ef42f89856f2984fa3ec27/FLAG5c3ec7d12 [2023-09-01 01:31:19,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69de41f57/cc1ba39407ef42f89856f2984fa3ec27 [2023-09-01 01:31:19,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:31:19,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:31:19,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:19,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:31:19,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:31:19,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:19" (1/1) ... [2023-09-01 01:31:19,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a01eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:19, skipping insertion in model container [2023-09-01 01:31:19,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:19" (1/1) ... [2023-09-01 01:31:19,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:31:19,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:31:19,327 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-09-01 01:31:19,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:19,344 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 01:31:19,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7867c88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:19, skipping insertion in model container [2023-09-01 01:31:19,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:19,345 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:31:19,347 INFO L158 Benchmark]: Toolchain (without parser) took 178.68ms. Allocated memory is still 86.0MB. Free memory was 63.9MB in the beginning and 54.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:31:19,348 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 43.2MB in the beginning and 43.2MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:31:19,348 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.88ms. Allocated memory is still 86.0MB. Free memory was 63.7MB in the beginning and 54.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:31:19,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 43.2MB in the beginning and 43.2MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.88ms. Allocated memory is still 86.0MB. Free memory was 63.7MB in the beginning and 54.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --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 01:31:20,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:31:20,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:31:20,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:31:20,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:31:20,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:31:20,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:31:20,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:31:20,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:31:20,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:31:20,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:31:20,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:31:20,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:31:20,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:31:20,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:31:20,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:31:20,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:31:20,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:31:20,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:31:20,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:31:20,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:31:21,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:31:21,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:31:21,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:31:21,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:31:21,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:31:21,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:31:21,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:31:21,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:31:21,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:31:21,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:31:21,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:31:21,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:31:21,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:31:21,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:31:21,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:31:21,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:31:21,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:31:21,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:31:21,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:31:21,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:31:21,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:31:21,065 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:31:21,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:31:21,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:31:21,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:31:21,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:31:21,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:31:21,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:31:21,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:31:21,069 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:31:21,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:31:21,070 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:31:21,070 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:31:21,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:31:21,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:31:21,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:31:21,071 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:31:21,071 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:31:21,071 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:31:21,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:31:21,072 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:31:21,072 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:31:21,072 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:31:21,072 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:31:21,072 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:31:21,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:31:21,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:31:21,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:31:21,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:31:21,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:31:21,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:31:21,074 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:31:21,074 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:31:21,074 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:31:21,075 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:31:21,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:31:21,075 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:31:21,075 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:31:21,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:31:21,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:31:21,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:31:21,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:31:21,402 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:31:21,403 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:31:21,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-09-01 01:31:22,646 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:31:22,873 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:31:22,874 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-09-01 01:31:22,884 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72caf3c2/e7a6e8bce89b464fbbb128ab48025b05/FLAG51db0b147 [2023-09-01 01:31:22,894 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72caf3c2/e7a6e8bce89b464fbbb128ab48025b05 [2023-09-01 01:31:22,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:31:22,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:31:22,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:22,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:31:22,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:31:22,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:22" (1/1) ... [2023-09-01 01:31:22,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62301fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:22, skipping insertion in model container [2023-09-01 01:31:22,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:22" (1/1) ... [2023-09-01 01:31:22,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:31:22,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:31:23,124 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-09-01 01:31:23,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:23,157 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:31:23,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:31:23,189 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-09-01 01:31:23,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:23,205 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:31:23,232 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-09-01 01:31:23,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:23,261 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:31:23,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23 WrapperNode [2023-09-01 01:31:23,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:23,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:31:23,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:31:23,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:31:23,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,316 INFO L138 Inliner]: procedures = 27, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 194 [2023-09-01 01:31:23,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:31:23,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:31:23,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:31:23,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:31:23,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:31:23,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:31:23,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:31:23,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:31:23,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (1/1) ... [2023-09-01 01:31:23,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:31:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:31:23,410 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 01:31:23,417 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 01:31:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:31:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:31:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:31:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:31:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:31:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:31:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:31:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:31:23,441 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 01:31:23,543 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:31:23,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:31:24,069 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:31:24,078 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:31:24,080 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:31:24,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:31:24 BoogieIcfgContainer [2023-09-01 01:31:24,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:31:24,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:31:24,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:31:24,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:31:24,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:31:22" (1/3) ... [2023-09-01 01:31:24,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e27a674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:31:24, skipping insertion in model container [2023-09-01 01:31:24,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:23" (2/3) ... [2023-09-01 01:31:24,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e27a674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:31:24, skipping insertion in model container [2023-09-01 01:31:24,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:31:24" (3/3) ... [2023-09-01 01:31:24,091 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-09-01 01:31:24,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:31:24,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-09-01 01:31:24,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:31:24,233 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:31:24,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 518 flow [2023-09-01 01:31:24,386 INFO L130 PetriNetUnfolder]: 21/249 cut-off events. [2023-09-01 01:31:24,386 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:31:24,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 21/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 376 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2023-09-01 01:31:24,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 251 transitions, 518 flow [2023-09-01 01:31:24,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 245 transitions, 502 flow [2023-09-01 01:31:24,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:31:24,418 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 245 transitions, 502 flow [2023-09-01 01:31:24,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 245 transitions, 502 flow [2023-09-01 01:31:24,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 245 transitions, 502 flow [2023-09-01 01:31:24,485 INFO L130 PetriNetUnfolder]: 21/245 cut-off events. [2023-09-01 01:31:24,486 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:31:24,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 21/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 376 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2023-09-01 01:31:24,493 INFO L119 LiptonReduction]: Number of co-enabled transitions 6816 [2023-09-01 01:31:40,801 INFO L134 LiptonReduction]: Checked pairs total: 7338 [2023-09-01 01:31:40,801 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-09-01 01:31:40,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:31:40,816 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;@23e7f4e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:31:40,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-09-01 01:31:40,820 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:31:40,820 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:31:40,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:40,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:31:40,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:40,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash 32138, now seen corresponding path program 1 times [2023-09-01 01:31:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:40,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025703578] [2023-09-01 01:31:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:40,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:40,839 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 01:31:40,852 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 01:31:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:40,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:31:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:41,092 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:31:41,093 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:31:41,117 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 01:31:41,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:41,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:41,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025703578] [2023-09-01 01:31:41,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025703578] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:41,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:41,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:31:41,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444113878] [2023-09-01 01:31:41,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:41,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:31:41,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:31:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:31:41,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-09-01 01:31:41,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 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 01:31:41,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:41,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-09-01 01:31:41,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:41,863 INFO L130 PetriNetUnfolder]: 909/1497 cut-off events. [2023-09-01 01:31:41,864 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 01:31:41,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3050 conditions, 1497 events. 909/1497 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 7419 event pairs, 770 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 1376. Up to 751 conditions per place. [2023-09-01 01:31:41,876 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 73 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-09-01 01:31:41,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 332 flow [2023-09-01 01:31:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-09-01 01:31:41,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543761638733706 [2023-09-01 01:31:41,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-09-01 01:31:41,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-09-01 01:31:41,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:41,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-09-01 01:31:41,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 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 01:31:41,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:41,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:41,918 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 732 transitions. [2023-09-01 01:31:41,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 332 flow [2023-09-01 01:31:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:31:41,928 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 116 flow [2023-09-01 01:31:41,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-09-01 01:31:41,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-09-01 01:31:41,934 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 116 flow [2023-09-01 01:31:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 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 01:31:41,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:41,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:31:41,949 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 01:31:42,144 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 01:31:42,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:42,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash 32136, now seen corresponding path program 1 times [2023-09-01 01:31:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450143987] [2023-09-01 01:31:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:42,146 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 01:31:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:42,147 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 01:31:42,151 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 01:31:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:31:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:42,270 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:31:42,270 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:31:42,281 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 01:31:42,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:42,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450143987] [2023-09-01 01:31:42,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450143987] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:42,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:31:42,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729094771] [2023-09-01 01:31:42,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:42,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:31:42,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:31:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:31:42,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 537 [2023-09-01 01:31:42,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 01:31:42,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:42,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 537 [2023-09-01 01:31:42,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:42,739 INFO L130 PetriNetUnfolder]: 909/1493 cut-off events. [2023-09-01 01:31:42,739 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 01:31:42,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 1493 events. 909/1493 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 7573 event pairs, 770 based on Foata normal form. 2/525 useless extension candidates. Maximal degree in co-relation 1499. Up to 1493 conditions per place. [2023-09-01 01:31:42,746 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 01:31:42,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 194 flow [2023-09-01 01:31:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-09-01 01:31:42,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43265052762259465 [2023-09-01 01:31:42,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-09-01 01:31:42,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-09-01 01:31:42,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:42,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-09-01 01:31:42,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 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 01:31:42,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:42,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:42,755 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 116 flow. Second operand 3 states and 697 transitions. [2023-09-01 01:31:42,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 194 flow [2023-09-01 01:31:42,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:42,757 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 106 flow [2023-09-01 01:31:42,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-09-01 01:31:42,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-09-01 01:31:42,758 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 106 flow [2023-09-01 01:31:42,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 01:31:42,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:42,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:31:42,767 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 01:31:42,967 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 01:31:42,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:42,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1001766, now seen corresponding path program 1 times [2023-09-01 01:31:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039078950] [2023-09-01 01:31:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:42,969 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 01:31:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:42,974 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 01:31:42,977 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 01:31:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:31:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:43,043 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 01:31:43,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:43,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:43,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039078950] [2023-09-01 01:31:43,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039078950] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:43,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:43,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418292862] [2023-09-01 01:31:43,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:43,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:31:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:31:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:31:43,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-09-01 01:31:43,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 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 01:31:43,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:43,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-09-01 01:31:43,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:43,328 INFO L130 PetriNetUnfolder]: 455/750 cut-off events. [2023-09-01 01:31:43,328 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 01:31:43,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 750 events. 455/750 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3222 event pairs, 385 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 1514. Up to 749 conditions per place. [2023-09-01 01:31:43,332 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-09-01 01:31:43,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 182 flow [2023-09-01 01:31:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-09-01 01:31:43,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388578522656735 [2023-09-01 01:31:43,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-09-01 01:31:43,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-09-01 01:31:43,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:43,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-09-01 01:31:43,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 01:31:43,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:43,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:43,341 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 106 flow. Second operand 3 states and 707 transitions. [2023-09-01 01:31:43,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 182 flow [2023-09-01 01:31:43,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:43,343 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 119 flow [2023-09-01 01:31:43,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-09-01 01:31:43,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-09-01 01:31:43,344 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 119 flow [2023-09-01 01:31:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 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 01:31:43,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:43,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:31:43,359 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 01:31:43,553 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 01:31:43,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:43,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1000578, now seen corresponding path program 1 times [2023-09-01 01:31:43,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:43,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436671187] [2023-09-01 01:31:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:43,554 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 01:31:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:43,557 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 01:31:43,558 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 01:31:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:31:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:43,668 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:31:43,668 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:31:43,705 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 01:31:43,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:43,798 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 01:31:43,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:43,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436671187] [2023-09-01 01:31:43,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436671187] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:43,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:43,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:31:43,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872630893] [2023-09-01 01:31:43,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:31:43,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:31:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:31:44,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-09-01 01:31:44,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 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 01:31:44,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:44,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-09-01 01:31:44,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:46,216 INFO L130 PetriNetUnfolder]: 1817/2985 cut-off events. [2023-09-01 01:31:46,216 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 01:31:46,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 2985 events. 1817/2985 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 17023 event pairs, 1540 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 6040. Up to 749 conditions per place. [2023-09-01 01:31:46,230 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 132 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-09-01 01:31:46,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 145 transitions, 676 flow [2023-09-01 01:31:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:31:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:31:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1429 transitions. [2023-09-01 01:31:46,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435133457479826 [2023-09-01 01:31:46,235 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1429 transitions. [2023-09-01 01:31:46,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1429 transitions. [2023-09-01 01:31:46,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:46,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1429 transitions. [2023-09-01 01:31:46,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.16666666666666) internal successors, (1429), 6 states have internal predecessors, (1429), 0 states have call successors, (0), 0 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 01:31:46,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 01:31:46,245 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 01:31:46,245 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 119 flow. Second operand 6 states and 1429 transitions. [2023-09-01 01:31:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 145 transitions, 676 flow [2023-09-01 01:31:46,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 145 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:46,248 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 207 flow [2023-09-01 01:31:46,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-09-01 01:31:46,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-09-01 01:31:46,249 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 207 flow [2023-09-01 01:31:46,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 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 01:31:46,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:46,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:31:46,260 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 01:31:46,459 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 01:31:46,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:46,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash 961725897, now seen corresponding path program 1 times [2023-09-01 01:31:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:46,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119244974] [2023-09-01 01:31:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:46,461 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 01:31:46,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:46,462 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 01:31:46,463 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 01:31:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:31:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:46,571 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 01:31:46,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:46,598 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 01:31:46,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119244974] [2023-09-01 01:31:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119244974] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:46,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:46,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 01:31:46,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261131843] [2023-09-01 01:31:46,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:46,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:31:46,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:31:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:31:46,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-09-01 01:31:46,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 0 states have call successors, (0), 0 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 01:31:46,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:46,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-09-01 01:31:46,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:47,166 INFO L130 PetriNetUnfolder]: 455/756 cut-off events. [2023-09-01 01:31:47,166 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 01:31:47,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 756 events. 455/756 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3222 event pairs, 385 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1560. Up to 747 conditions per place. [2023-09-01 01:31:47,170 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 34 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-09-01 01:31:47,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 275 flow [2023-09-01 01:31:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:31:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:31:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1360 transitions. [2023-09-01 01:31:47,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42209807572936064 [2023-09-01 01:31:47,174 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1360 transitions. [2023-09-01 01:31:47,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1360 transitions. [2023-09-01 01:31:47,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:47,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1360 transitions. [2023-09-01 01:31:47,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.66666666666666) internal successors, (1360), 6 states have internal predecessors, (1360), 0 states have call successors, (0), 0 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 01:31:47,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 01:31:47,183 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 01:31:47,184 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 207 flow. Second operand 6 states and 1360 transitions. [2023-09-01 01:31:47,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 275 flow [2023-09-01 01:31:47,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:47,186 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 223 flow [2023-09-01 01:31:47,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-09-01 01:31:47,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-09-01 01:31:47,187 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 223 flow [2023-09-01 01:31:47,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 0 states have call successors, (0), 0 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 01:31:47,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:47,188 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:31:47,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:47,401 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 01:31:47,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:47,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash -252281974, now seen corresponding path program 2 times [2023-09-01 01:31:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:47,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555927993] [2023-09-01 01:31:47,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:31:47,402 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 01:31:47,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:47,403 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 01:31:47,404 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 01:31:47,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:31:47,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:31:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:31:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:47,522 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:31:47,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:31:47,628 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 01:31:47,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:47,980 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 01:31:47,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:47,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555927993] [2023-09-01 01:31:47,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555927993] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:47,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:47,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:31:47,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549968585] [2023-09-01 01:31:47,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:47,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:31:47,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:31:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:31:50,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-09-01 01:31:50,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 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 01:31:50,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:50,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-09-01 01:31:50,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:51,195 INFO L130 PetriNetUnfolder]: 909/1501 cut-off events. [2023-09-01 01:31:51,195 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 01:31:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1501 events. 909/1501 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 7567 event pairs, 770 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3096. Up to 749 conditions per place. [2023-09-01 01:31:51,202 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 68 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2023-09-01 01:31:51,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 497 flow [2023-09-01 01:31:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:31:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:31:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1574 transitions. [2023-09-01 01:31:51,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41872838520883215 [2023-09-01 01:31:51,208 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1574 transitions. [2023-09-01 01:31:51,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1574 transitions. [2023-09-01 01:31:51,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:51,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1574 transitions. [2023-09-01 01:31:51,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 224.85714285714286) internal successors, (1574), 7 states have internal predecessors, (1574), 0 states have call successors, (0), 0 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 01:31:51,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 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 01:31:51,221 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 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 01:31:51,221 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 223 flow. Second operand 7 states and 1574 transitions. [2023-09-01 01:31:51,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 497 flow [2023-09-01 01:31:51,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 01:31:51,225 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 239 flow [2023-09-01 01:31:51,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-09-01 01:31:51,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-09-01 01:31:51,229 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 239 flow [2023-09-01 01:31:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 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 01:31:51,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:51,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2023-09-01 01:31:51,240 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 (7)] Ended with exit code 0 [2023-09-01 01:31:51,439 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 01:31:51,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:51,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 769197698, now seen corresponding path program 3 times [2023-09-01 01:31:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19780780] [2023-09-01 01:31:51,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:31:51,441 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 01:31:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:51,442 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 01:31:51,443 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 01:31:51,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 01:31:51,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:31:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:31:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:51,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:51,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:51,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19780780] [2023-09-01 01:31:51,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19780780] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:51,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:51,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:31:51,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141207150] [2023-09-01 01:31:51,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:31:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:31:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:31:52,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-09-01 01:31:52,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 218.0) internal successors, (3052), 14 states have internal predecessors, (3052), 0 states have call successors, (0), 0 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 01:31:52,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:52,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-09-01 01:31:52,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:53,177 INFO L130 PetriNetUnfolder]: 453/754 cut-off events. [2023-09-01 01:31:53,177 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:31:53,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 754 events. 453/754 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3223 event pairs, 385 based on Foata normal form. 6/276 useless extension candidates. Maximal degree in co-relation 1565. Up to 744 conditions per place. [2023-09-01 01:31:53,181 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 32 selfloop transitions, 12 changer transitions 0/44 dead transitions. [2023-09-01 01:31:53,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 285 flow [2023-09-01 01:31:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:31:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:31:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1788 transitions. [2023-09-01 01:31:53,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41620111731843573 [2023-09-01 01:31:53,188 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1788 transitions. [2023-09-01 01:31:53,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1788 transitions. [2023-09-01 01:31:53,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:53,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1788 transitions. [2023-09-01 01:31:53,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 0 states have call successors, (0), 0 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 01:31:53,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:31:53,197 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:31:53,198 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 239 flow. Second operand 8 states and 1788 transitions. [2023-09-01 01:31:53,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 285 flow [2023-09-01 01:31:53,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 245 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-09-01 01:31:53,201 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 191 flow [2023-09-01 01:31:53,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-09-01 01:31:53,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-09-01 01:31:53,202 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 191 flow [2023-09-01 01:31:53,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 218.0) internal successors, (3052), 14 states have internal predecessors, (3052), 0 states have call successors, (0), 0 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 01:31:53,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:53,203 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-09-01 01:31:53,213 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 (8)] Ended with exit code 0 [2023-09-01 01:31:53,413 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 01:31:53,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:53,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1879371511, now seen corresponding path program 2 times [2023-09-01 01:31:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:53,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261566175] [2023-09-01 01:31:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:31:53,416 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 01:31:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:53,417 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 01:31:53,420 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 01:31:53,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:31:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:31:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:31:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:53,557 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 01:31:53,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 01:31:53,682 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:53,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:31:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:53,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:53,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:53,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261566175] [2023-09-01 01:31:53,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261566175] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:53,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:53,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:31:53,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327265284] [2023-09-01 01:31:53,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:53,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:31:53,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:53,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:31:53,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:31:53,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-09-01 01:31:53,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 01:31:53,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:53,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-09-01 01:31:53,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:54,092 INFO L130 PetriNetUnfolder]: 341/585 cut-off events. [2023-09-01 01:31:54,093 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 01:31:54,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 585 events. 341/585 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2375 event pairs, 288 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1219. Up to 585 conditions per place. [2023-09-01 01:31:54,096 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-09-01 01:31:54,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 261 flow [2023-09-01 01:31:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-09-01 01:31:54,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2023-09-01 01:31:54,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-09-01 01:31:54,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-09-01 01:31:54,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:54,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-09-01 01:31:54,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:54,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:54,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:54,103 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 191 flow. Second operand 3 states and 702 transitions. [2023-09-01 01:31:54,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 261 flow [2023-09-01 01:31:54,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 236 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 01:31:54,105 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2023-09-01 01:31:54,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-09-01 01:31:54,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-09-01 01:31:54,106 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2023-09-01 01:31:54,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 01:31:54,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:54,106 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-09-01 01:31:54,115 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 01:31:54,315 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 01:31:54,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:54,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1879371510, now seen corresponding path program 1 times [2023-09-01 01:31:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:54,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173922784] [2023-09-01 01:31:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:54,317 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 01:31:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:54,318 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 01:31:54,320 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 01:31:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:31:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:54,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:54,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:54,532 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:31:54,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 01:31:54,542 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 10 treesize of output 8 [2023-09-01 01:31:54,656 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:31:54,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-09-01 01:31:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:54,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:54,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173922784] [2023-09-01 01:31:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173922784] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:54,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:54,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:54,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816597723] [2023-09-01 01:31:54,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:54,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:54,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:55,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-09-01 01:31:55,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 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 01:31:55,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:55,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-09-01 01:31:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:55,313 INFO L130 PetriNetUnfolder]: 229/416 cut-off events. [2023-09-01 01:31:55,314 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 01:31:55,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 416 events. 229/416 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1580 event pairs, 191 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 865. Up to 410 conditions per place. [2023-09-01 01:31:55,316 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-09-01 01:31:55,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 220 flow [2023-09-01 01:31:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:31:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:31:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 918 transitions. [2023-09-01 01:31:55,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273743016759777 [2023-09-01 01:31:55,319 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 918 transitions. [2023-09-01 01:31:55,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 918 transitions. [2023-09-01 01:31:55,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:55,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 918 transitions. [2023-09-01 01:31:55,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 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 01:31:55,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:55,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:55,325 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 4 states and 918 transitions. [2023-09-01 01:31:55,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 220 flow [2023-09-01 01:31:55,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:55,327 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2023-09-01 01:31:55,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-09-01 01:31:55,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-09-01 01:31:55,328 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2023-09-01 01:31:55,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 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 01:31:55,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:55,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-09-01 01:31:55,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:55,539 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 01:31:55,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:55,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2105233734, now seen corresponding path program 1 times [2023-09-01 01:31:55,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:55,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370978829] [2023-09-01 01:31:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:55,541 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 01:31:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:55,542 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 01:31:55,544 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 01:31:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:31:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:55,770 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 01:31:55,771 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 01:31:55,803 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:55,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:31:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:55,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:55,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:55,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370978829] [2023-09-01 01:31:55,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370978829] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:55,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:55,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:31:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808324437] [2023-09-01 01:31:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:31:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:55,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:31:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:31:55,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2023-09-01 01:31:55,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 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 01:31:55,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:55,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2023-09-01 01:31:55,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:56,086 INFO L130 PetriNetUnfolder]: 214/386 cut-off events. [2023-09-01 01:31:56,087 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 01:31:56,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 386 events. 214/386 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1438 event pairs, 178 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 806. Up to 386 conditions per place. [2023-09-01 01:31:56,089 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 01:31:56,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 215 flow [2023-09-01 01:31:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-09-01 01:31:56,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954686530105524 [2023-09-01 01:31:56,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-09-01 01:31:56,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-09-01 01:31:56,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:56,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-09-01 01:31:56,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 01:31:56,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:56,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 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 01:31:56,097 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 3 states and 692 transitions. [2023-09-01 01:31:56,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 215 flow [2023-09-01 01:31:56,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:56,098 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 138 flow [2023-09-01 01:31:56,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-09-01 01:31:56,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-09-01 01:31:56,099 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 138 flow [2023-09-01 01:31:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 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 01:31:56,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:56,100 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-09-01 01:31:56,112 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 01:31:56,309 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 01:31:56,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:56,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2105233735, now seen corresponding path program 1 times [2023-09-01 01:31:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453430607] [2023-09-01 01:31:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:56,311 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 01:31:56,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:56,312 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 01:31:56,314 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 01:31:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:56,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 01:31:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:56,544 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-09-01 01:31:56,545 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-09-01 01:31:56,555 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 39 treesize of output 37 [2023-09-01 01:31:56,611 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:31:56,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-09-01 01:31:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:56,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:56,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453430607] [2023-09-01 01:31:56,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453430607] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:56,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:56,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123049039] [2023-09-01 01:31:56,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:56,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:56,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:56,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-09-01 01:31:56,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 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 01:31:56,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:56,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-09-01 01:31:56,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:57,130 INFO L130 PetriNetUnfolder]: 199/356 cut-off events. [2023-09-01 01:31:57,131 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 01:31:57,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 356 events. 199/356 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1301 event pairs, 165 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 746. Up to 350 conditions per place. [2023-09-01 01:31:57,133 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 34 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-09-01 01:31:57,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 206 flow [2023-09-01 01:31:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:31:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:31:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 914 transitions. [2023-09-01 01:31:57,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425512104283054 [2023-09-01 01:31:57,136 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 914 transitions. [2023-09-01 01:31:57,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 914 transitions. [2023-09-01 01:31:57,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:57,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 914 transitions. [2023-09-01 01:31:57,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 01:31:57,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:57,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:57,142 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 138 flow. Second operand 4 states and 914 transitions. [2023-09-01 01:31:57,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 206 flow [2023-09-01 01:31:57,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:57,144 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 137 flow [2023-09-01 01:31:57,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-09-01 01:31:57,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-09-01 01:31:57,145 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 137 flow [2023-09-01 01:31:57,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 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 01:31:57,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:57,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:57,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:57,356 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 01:31:57,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:57,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:57,357 INFO L85 PathProgramCache]: Analyzing trace with hash 837737791, now seen corresponding path program 1 times [2023-09-01 01:31:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:57,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343497623] [2023-09-01 01:31:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:57,358 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 01:31:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:57,359 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 01:31:57,362 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 01:31:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:31:57,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:57,561 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:31:57,561 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:31:57,593 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:31:57,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:31:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:57,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:57,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343497623] [2023-09-01 01:31:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343497623] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:57,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:57,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:57,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75982824] [2023-09-01 01:31:57,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:57,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:57,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:57,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:57,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-09-01 01:31:57,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 01:31:57,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:57,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-09-01 01:31:57,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:57,876 INFO L130 PetriNetUnfolder]: 153/278 cut-off events. [2023-09-01 01:31:57,876 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 01:31:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 278 events. 153/278 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 905 event pairs, 123 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 590. Up to 272 conditions per place. [2023-09-01 01:31:57,877 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-09-01 01:31:57,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 201 flow [2023-09-01 01:31:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:31:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:31:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 880 transitions. [2023-09-01 01:31:57,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409683426443203 [2023-09-01 01:31:57,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 880 transitions. [2023-09-01 01:31:57,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 880 transitions. [2023-09-01 01:31:57,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:57,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 880 transitions. [2023-09-01 01:31:57,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 01:31:57,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:57,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:57,884 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 137 flow. Second operand 4 states and 880 transitions. [2023-09-01 01:31:57,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 201 flow [2023-09-01 01:31:57,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:57,886 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 134 flow [2023-09-01 01:31:57,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-09-01 01:31:57,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-09-01 01:31:57,887 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 134 flow [2023-09-01 01:31:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 01:31:57,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:57,903 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 (13)] Ended with exit code 0 [2023-09-01 01:31:58,098 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 01:31:58,098 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:58,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash 837737792, now seen corresponding path program 1 times [2023-09-01 01:31:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:58,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18854137] [2023-09-01 01:31:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:58,099 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 01:31:58,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:58,100 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 01:31:58,101 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 01:31:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:31:58,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:58,373 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:31:58,373 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:31:58,419 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:31:58,419 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:31:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:58,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:31:58,492 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:31:58,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:31:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:58,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:58,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18854137] [2023-09-01 01:31:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18854137] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:58,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:58,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743595636] [2023-09-01 01:31:58,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:58,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:58,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2023-09-01 01:31:58,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 213.6) internal successors, (1068), 5 states have internal predecessors, (1068), 0 states have call successors, (0), 0 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 01:31:58,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:58,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2023-09-01 01:31:58,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:59,053 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-09-01 01:31:59,053 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 01:31:59,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 474 events. 265/474 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2031 event pairs, 123 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 988. Up to 272 conditions per place. [2023-09-01 01:31:59,056 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 48 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-09-01 01:31:59,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 277 flow [2023-09-01 01:31:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:31:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:31:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-09-01 01:31:59,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41154562383612664 [2023-09-01 01:31:59,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-09-01 01:31:59,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-09-01 01:31:59,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:59,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-09-01 01:31:59,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 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 01:31:59,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:31:59,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:31:59,070 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 134 flow. Second operand 5 states and 1105 transitions. [2023-09-01 01:31:59,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 277 flow [2023-09-01 01:31:59,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:59,072 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 147 flow [2023-09-01 01:31:59,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-09-01 01:31:59,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-09-01 01:31:59,073 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 147 flow [2023-09-01 01:31:59,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.6) internal successors, (1068), 5 states have internal predecessors, (1068), 0 states have call successors, (0), 0 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 01:31:59,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:59,074 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:59,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:59,285 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 01:31:59,286 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:59,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 837737829, now seen corresponding path program 1 times [2023-09-01 01:31:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:59,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424275773] [2023-09-01 01:31:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:59,287 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 01:31:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:59,288 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 01:31:59,289 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 01:31:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:31:59,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:59,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:31:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:31:59,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:59,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:59,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424275773] [2023-09-01 01:31:59,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424275773] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:59,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:59,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:59,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032900108] [2023-09-01 01:31:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:59,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:59,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-09-01 01:31:59,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 01:31:59,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:59,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-09-01 01:31:59,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:59,739 INFO L130 PetriNetUnfolder]: 191/348 cut-off events. [2023-09-01 01:31:59,740 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 01:31:59,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 348 events. 191/348 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1223 event pairs, 155 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 795. Up to 336 conditions per place. [2023-09-01 01:31:59,742 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-09-01 01:31:59,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 33 transitions, 209 flow [2023-09-01 01:31:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:31:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:31:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 878 transitions. [2023-09-01 01:31:59,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40875232774674114 [2023-09-01 01:31:59,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 878 transitions. [2023-09-01 01:31:59,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 878 transitions. [2023-09-01 01:31:59,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:59,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 878 transitions. [2023-09-01 01:31:59,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 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 01:31:59,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:59,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:31:59,751 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 147 flow. Second operand 4 states and 878 transitions. [2023-09-01 01:31:59,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 33 transitions, 209 flow [2023-09-01 01:31:59,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 203 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:31:59,752 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 141 flow [2023-09-01 01:31:59,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-09-01 01:31:59,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-09-01 01:31:59,753 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 141 flow [2023-09-01 01:31:59,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 01:31:59,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:59,754 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:59,765 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 01:31:59,964 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 01:31:59,965 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:31:59,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 837737831, now seen corresponding path program 1 times [2023-09-01 01:31:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019284333] [2023-09-01 01:31:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:59,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:59,967 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 01:31:59,967 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 01:32:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:32:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:00,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:32:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:00,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:00,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:00,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019284333] [2023-09-01 01:32:00,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019284333] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:00,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:00,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:00,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751563992] [2023-09-01 01:32:00,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:00,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:00,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2023-09-01 01:32:00,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 0 states have call successors, (0), 0 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 01:32:00,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:00,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2023-09-01 01:32:00,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:00,678 INFO L130 PetriNetUnfolder]: 174/319 cut-off events. [2023-09-01 01:32:00,678 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-09-01 01:32:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 319 events. 174/319 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1163 event pairs, 87 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 724. Up to 198 conditions per place. [2023-09-01 01:32:00,680 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-09-01 01:32:00,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 266 flow [2023-09-01 01:32:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1120 transitions. [2023-09-01 01:32:00,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171322160148976 [2023-09-01 01:32:00,685 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1120 transitions. [2023-09-01 01:32:00,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1120 transitions. [2023-09-01 01:32:00,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:00,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1120 transitions. [2023-09-01 01:32:00,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 01:32:00,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:00,691 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:00,691 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 141 flow. Second operand 5 states and 1120 transitions. [2023-09-01 01:32:00,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 266 flow [2023-09-01 01:32:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:32:00,693 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 150 flow [2023-09-01 01:32:00,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-09-01 01:32:00,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-09-01 01:32:00,694 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 150 flow [2023-09-01 01:32:00,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 0 states have call successors, (0), 0 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 01:32:00,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:00,694 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:00,711 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 01:32:00,905 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 01:32:00,906 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:00,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1907201400, now seen corresponding path program 1 times [2023-09-01 01:32:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782814387] [2023-09-01 01:32:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:00,906 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 01:32:00,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:00,907 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 01:32:00,908 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 01:32:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:32:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:01,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:32:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:01,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:01,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782814387] [2023-09-01 01:32:01,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782814387] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:01,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:01,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:32:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829732865] [2023-09-01 01:32:01,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:01,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:01,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:02,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-09-01 01:32:02,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 150 flow. Second operand has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 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 01:32:02,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:02,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-09-01 01:32:02,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:03,271 INFO L130 PetriNetUnfolder]: 408/733 cut-off events. [2023-09-01 01:32:03,271 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-09-01 01:32:03,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 733 events. 408/733 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3028 event pairs, 87 based on Foata normal form. 36/553 useless extension candidates. Maximal degree in co-relation 1685. Up to 198 conditions per place. [2023-09-01 01:32:03,274 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 88 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2023-09-01 01:32:03,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 95 transitions, 488 flow [2023-09-01 01:32:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1810 transitions. [2023-09-01 01:32:03,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213221601489758 [2023-09-01 01:32:03,279 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1810 transitions. [2023-09-01 01:32:03,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1810 transitions. [2023-09-01 01:32:03,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:03,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1810 transitions. [2023-09-01 01:32:03,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 226.25) internal successors, (1810), 8 states have internal predecessors, (1810), 0 states have call successors, (0), 0 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 01:32:03,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:03,288 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:03,288 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 150 flow. Second operand 8 states and 1810 transitions. [2023-09-01 01:32:03,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 95 transitions, 488 flow [2023-09-01 01:32:03,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 480 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:32:03,290 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 182 flow [2023-09-01 01:32:03,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2023-09-01 01:32:03,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-09-01 01:32:03,291 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 182 flow [2023-09-01 01:32:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 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 01:32:03,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:03,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:03,304 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 01:32:03,503 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 01:32:03,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:03,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1906378013, now seen corresponding path program 1 times [2023-09-01 01:32:03,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:03,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176714128] [2023-09-01 01:32:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:03,505 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 01:32:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:03,506 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 01:32:03,508 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 01:32:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:32:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:32:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:03,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:03,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:03,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176714128] [2023-09-01 01:32:03,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176714128] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:03,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:03,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:03,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316095946] [2023-09-01 01:32:03,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:03,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:03,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:03,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2023-09-01 01:32:03,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 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 01:32:03,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:03,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2023-09-01 01:32:03,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:04,177 INFO L130 PetriNetUnfolder]: 627/1118 cut-off events. [2023-09-01 01:32:04,178 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-09-01 01:32:04,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 1118 events. 627/1118 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5527 event pairs, 344 based on Foata normal form. 0/768 useless extension candidates. Maximal degree in co-relation 2719. Up to 721 conditions per place. [2023-09-01 01:32:04,183 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-09-01 01:32:04,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 370 flow [2023-09-01 01:32:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1119 transitions. [2023-09-01 01:32:04,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41675977653631285 [2023-09-01 01:32:04,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1119 transitions. [2023-09-01 01:32:04,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1119 transitions. [2023-09-01 01:32:04,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:04,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1119 transitions. [2023-09-01 01:32:04,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:04,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:04,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:04,193 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 182 flow. Second operand 5 states and 1119 transitions. [2023-09-01 01:32:04,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 370 flow [2023-09-01 01:32:04,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:32:04,195 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 193 flow [2023-09-01 01:32:04,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2023-09-01 01:32:04,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-09-01 01:32:04,196 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 193 flow [2023-09-01 01:32:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 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 01:32:04,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:04,197 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:04,209 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 01:32:04,408 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 01:32:04,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:04,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1906378143, now seen corresponding path program 1 times [2023-09-01 01:32:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:04,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851096240] [2023-09-01 01:32:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:04,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:04,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:04,410 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 01:32:04,411 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 01:32:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:04,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:32:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:04,657 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:32:04,657 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:32:04,706 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:32:04,706 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:32:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:04,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:32:04,775 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:04,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:32:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:04,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:04,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851096240] [2023-09-01 01:32:04,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851096240] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:04,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:04,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:32:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730452395] [2023-09-01 01:32:04,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:04,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:05,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2023-09-01 01:32:05,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 01:32:05,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:05,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2023-09-01 01:32:05,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:05,316 INFO L130 PetriNetUnfolder]: 554/993 cut-off events. [2023-09-01 01:32:05,317 INFO L131 PetriNetUnfolder]: For 645/645 co-relation queries the response was YES. [2023-09-01 01:32:05,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2687 conditions, 993 events. 554/993 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4743 event pairs, 344 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 2666. Up to 727 conditions per place. [2023-09-01 01:32:05,322 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 49 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-09-01 01:32:05,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 373 flow [2023-09-01 01:32:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1098 transitions. [2023-09-01 01:32:05,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40893854748603353 [2023-09-01 01:32:05,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1098 transitions. [2023-09-01 01:32:05,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1098 transitions. [2023-09-01 01:32:05,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:05,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1098 transitions. [2023-09-01 01:32:05,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 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 01:32:05,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:05,332 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:05,332 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 193 flow. Second operand 5 states and 1098 transitions. [2023-09-01 01:32:05,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 373 flow [2023-09-01 01:32:05,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:32:05,335 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 199 flow [2023-09-01 01:32:05,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-09-01 01:32:05,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-09-01 01:32:05,335 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 199 flow [2023-09-01 01:32:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 01:32:05,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:05,336 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:05,352 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 01:32:05,548 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 01:32:05,549 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:05,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1907201361, now seen corresponding path program 1 times [2023-09-01 01:32:05,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:05,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325396287] [2023-09-01 01:32:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:05,550 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 01:32:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:05,550 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 01:32:05,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 01:32:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:32:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:05,803 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:32:05,804 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:32:05,847 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:32:05,847 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:32:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:05,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:32:05,917 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:05,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:32:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:05,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:06,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325396287] [2023-09-01 01:32:06,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325396287] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:06,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:06,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:32:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453087915] [2023-09-01 01:32:06,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:09,290 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 [1] [2023-09-01 01:32:11,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:14,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:15,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 537 [2023-09-01 01:32:15,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 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 01:32:15,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:15,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 537 [2023-09-01 01:32:15,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:16,075 INFO L130 PetriNetUnfolder]: 485/876 cut-off events. [2023-09-01 01:32:16,075 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-09-01 01:32:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 876 events. 485/876 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3849 event pairs, 81 based on Foata normal form. 48/798 useless extension candidates. Maximal degree in co-relation 2489. Up to 227 conditions per place. [2023-09-01 01:32:16,081 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 87 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2023-09-01 01:32:16,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 97 transitions, 589 flow [2023-09-01 01:32:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1750 transitions. [2023-09-01 01:32:16,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073556797020484 [2023-09-01 01:32:16,085 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1750 transitions. [2023-09-01 01:32:16,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1750 transitions. [2023-09-01 01:32:16,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:16,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1750 transitions. [2023-09-01 01:32:16,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 218.75) internal successors, (1750), 8 states have internal predecessors, (1750), 0 states have call successors, (0), 0 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 01:32:16,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:16,095 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:16,095 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 199 flow. Second operand 8 states and 1750 transitions. [2023-09-01 01:32:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 97 transitions, 589 flow [2023-09-01 01:32:16,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 559 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 01:32:16,099 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 230 flow [2023-09-01 01:32:16,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2023-09-01 01:32:16,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-09-01 01:32:16,100 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 230 flow [2023-09-01 01:32:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 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 01:32:16,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:16,101 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:16,116 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 01:32:16,313 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 01:32:16,313 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:16,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1031814743, now seen corresponding path program 1 times [2023-09-01 01:32:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:16,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513428224] [2023-09-01 01:32:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:16,314 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 01:32:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:16,315 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 01:32:16,319 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 01:32:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:32:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:16,596 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:32:16,597 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:32:16,631 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:32:16,631 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:32:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:16,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:32:16,687 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:16,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:32:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:17,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513428224] [2023-09-01 01:32:17,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513428224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:17,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:17,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:32:17,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142621277] [2023-09-01 01:32:17,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:17,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:17,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:18,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-09-01 01:32:18,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 213.2) internal successors, (2132), 10 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 01:32:18,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:18,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-09-01 01:32:18,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:19,330 INFO L130 PetriNetUnfolder]: 1061/1896 cut-off events. [2023-09-01 01:32:19,330 INFO L131 PetriNetUnfolder]: For 2942/2942 co-relation queries the response was YES. [2023-09-01 01:32:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 1896 events. 1061/1896 cut-off events. For 2942/2942 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10293 event pairs, 299 based on Foata normal form. 138/1850 useless extension candidates. Maximal degree in co-relation 5719. Up to 640 conditions per place. [2023-09-01 01:32:19,337 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 105 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2023-09-01 01:32:19,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 910 flow [2023-09-01 01:32:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1770 transitions. [2023-09-01 01:32:19,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41201117318435754 [2023-09-01 01:32:19,342 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1770 transitions. [2023-09-01 01:32:19,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1770 transitions. [2023-09-01 01:32:19,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:19,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1770 transitions. [2023-09-01 01:32:19,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 221.25) internal successors, (1770), 8 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 01:32:19,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:19,349 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:19,349 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 230 flow. Second operand 8 states and 1770 transitions. [2023-09-01 01:32:19,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 910 flow [2023-09-01 01:32:19,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 787 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-09-01 01:32:19,354 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 243 flow [2023-09-01 01:32:19,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-09-01 01:32:19,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2023-09-01 01:32:19,355 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 243 flow [2023-09-01 01:32:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 213.2) internal successors, (2132), 10 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 01:32:19,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:19,356 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:19,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:19,569 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 01:32:19,569 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:19,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1031814873, now seen corresponding path program 1 times [2023-09-01 01:32:19,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:19,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578135516] [2023-09-01 01:32:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:19,570 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 01:32:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:19,571 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 01:32:19,572 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 01:32:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:19,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:32:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:19,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:32:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:19,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:20,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578135516] [2023-09-01 01:32:20,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578135516] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:20,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:20,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:32:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730764138] [2023-09-01 01:32:20,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:21,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-09-01 01:32:21,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 243 flow. Second operand has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 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 01:32:21,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:21,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-09-01 01:32:21,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:22,125 INFO L130 PetriNetUnfolder]: 869/1566 cut-off events. [2023-09-01 01:32:22,125 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2023-09-01 01:32:22,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 1566 events. 869/1566 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8113 event pairs, 237 based on Foata normal form. 138/1676 useless extension candidates. Maximal degree in co-relation 4904. Up to 524 conditions per place. [2023-09-01 01:32:22,132 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-09-01 01:32:22,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 109 transitions, 797 flow [2023-09-01 01:32:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1799 transitions. [2023-09-01 01:32:22,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41876163873370575 [2023-09-01 01:32:22,136 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1799 transitions. [2023-09-01 01:32:22,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1799 transitions. [2023-09-01 01:32:22,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:22,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1799 transitions. [2023-09-01 01:32:22,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.875) internal successors, (1799), 8 states have internal predecessors, (1799), 0 states have call successors, (0), 0 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 01:32:22,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:22,156 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:22,156 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 243 flow. Second operand 8 states and 1799 transitions. [2023-09-01 01:32:22,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 109 transitions, 797 flow [2023-09-01 01:32:22,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 786 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:32:22,162 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 261 flow [2023-09-01 01:32:22,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2023-09-01 01:32:22,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2023-09-01 01:32:22,162 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 261 flow [2023-09-01 01:32:22,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 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 01:32:22,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:22,163 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:22,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:22,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:22,375 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:22,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:22,375 INFO L85 PathProgramCache]: Analyzing trace with hash 292861853, now seen corresponding path program 2 times [2023-09-01 01:32:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:22,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632432876] [2023-09-01 01:32:22,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:32:22,376 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 01:32:22,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:22,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:22,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 01:32:22,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:32:22,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:32:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:22,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:32:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:22,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:23,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632432876] [2023-09-01 01:32:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632432876] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:23,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-09-01 01:32:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923525133] [2023-09-01 01:32:23,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:32:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:32:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:32:27,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-09-01 01:32:27,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 261 flow. Second operand has 16 states, 16 states have (on average 216.625) internal successors, (3466), 16 states have internal predecessors, (3466), 0 states have call successors, (0), 0 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 01:32:27,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:27,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-09-01 01:32:27,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:28,356 INFO L130 PetriNetUnfolder]: 1061/1906 cut-off events. [2023-09-01 01:32:28,357 INFO L131 PetriNetUnfolder]: For 3696/3696 co-relation queries the response was YES. [2023-09-01 01:32:28,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1906 events. 1061/1906 cut-off events. For 3696/3696 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10225 event pairs, 237 based on Foata normal form. 46/1918 useless extension candidates. Maximal degree in co-relation 6437. Up to 524 conditions per place. [2023-09-01 01:32:28,366 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 133 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2023-09-01 01:32:28,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 1061 flow [2023-09-01 01:32:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:32:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:32:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2250 transitions. [2023-09-01 01:32:28,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41899441340782123 [2023-09-01 01:32:28,371 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2250 transitions. [2023-09-01 01:32:28,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2250 transitions. [2023-09-01 01:32:28,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:28,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2250 transitions. [2023-09-01 01:32:28,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 225.0) internal successors, (2250), 10 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:28,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 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 01:32:28,379 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 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 01:32:28,379 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 261 flow. Second operand 10 states and 2250 transitions. [2023-09-01 01:32:28,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 1061 flow [2023-09-01 01:32:28,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 1024 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-09-01 01:32:28,389 INFO L231 Difference]: Finished difference. Result has 74 places, 43 transitions, 273 flow [2023-09-01 01:32:28,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=273, PETRI_PLACES=74, PETRI_TRANSITIONS=43} [2023-09-01 01:32:28,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-09-01 01:32:28,391 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 43 transitions, 273 flow [2023-09-01 01:32:28,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 216.625) internal successors, (3466), 16 states have internal predecessors, (3466), 0 states have call successors, (0), 0 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 01:32:28,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:28,392 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:28,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:28,605 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:28,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 292861983, now seen corresponding path program 2 times [2023-09-01 01:32:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:28,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219556105] [2023-09-01 01:32:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:32:28,606 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 01:32:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:28,607 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:28,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 01:32:28,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:32:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:28,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:32:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:28,805 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:32:28,805 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:32:28,852 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:32:28,852 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:32:28,920 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:32:28,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:32:28,935 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:28,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:32:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:32:29,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:29,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:29,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219556105] [2023-09-01 01:32:29,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219556105] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:29,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:29,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:32:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220823381] [2023-09-01 01:32:29,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:29,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:29,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-09-01 01:32:29,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 43 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 0 states have call successors, (0), 0 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 01:32:29,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:29,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-09-01 01:32:29,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:29,653 INFO L130 PetriNetUnfolder]: 889/1612 cut-off events. [2023-09-01 01:32:29,653 INFO L131 PetriNetUnfolder]: For 2438/2438 co-relation queries the response was YES. [2023-09-01 01:32:29,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 1612 events. 889/1612 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8239 event pairs, 815 based on Foata normal form. 88/1700 useless extension candidates. Maximal degree in co-relation 5257. Up to 1600 conditions per place. [2023-09-01 01:32:29,660 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 37 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-09-01 01:32:29,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 40 transitions, 334 flow [2023-09-01 01:32:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1079 transitions. [2023-09-01 01:32:29,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40186219739292367 [2023-09-01 01:32:29,663 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1079 transitions. [2023-09-01 01:32:29,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1079 transitions. [2023-09-01 01:32:29,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:29,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1079 transitions. [2023-09-01 01:32:29,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.8) internal successors, (1079), 5 states have internal predecessors, (1079), 0 states have call successors, (0), 0 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 01:32:29,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:29,667 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 01:32:29,667 INFO L175 Difference]: Start difference. First operand has 74 places, 43 transitions, 273 flow. Second operand 5 states and 1079 transitions. [2023-09-01 01:32:29,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 40 transitions, 334 flow [2023-09-01 01:32:29,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 40 transitions, 310 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-09-01 01:32:29,673 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 236 flow [2023-09-01 01:32:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2023-09-01 01:32:29,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2023-09-01 01:32:29,674 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 236 flow [2023-09-01 01:32:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 0 states have call successors, (0), 0 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 01:32:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:29,674 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:29,683 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 (24)] Ended with exit code 0 [2023-09-01 01:32:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:29,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:29,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash 488791719, now seen corresponding path program 3 times [2023-09-01 01:32:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:29,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125290766] [2023-09-01 01:32:29,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:32:29,884 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 01:32:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:29,886 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:29,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 01:32:30,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 01:32:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:32:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:30,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:30,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:30,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125290766] [2023-09-01 01:32:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125290766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:30,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:32:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998966631] [2023-09-01 01:32:30,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:30,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:32:30,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:32:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:32:30,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 537 [2023-09-01 01:32:30,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 236 flow. Second operand has 14 states, 14 states have (on average 227.57142857142858) internal successors, (3186), 14 states have internal predecessors, (3186), 0 states have call successors, (0), 0 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 01:32:30,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:30,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 537 [2023-09-01 01:32:30,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:31,433 INFO L130 PetriNetUnfolder]: 784/1463 cut-off events. [2023-09-01 01:32:31,433 INFO L131 PetriNetUnfolder]: For 1620/1620 co-relation queries the response was YES. [2023-09-01 01:32:31,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1463 events. 784/1463 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7616 event pairs, 48 based on Foata normal form. 88/1551 useless extension candidates. Maximal degree in co-relation 4161. Up to 264 conditions per place. [2023-09-01 01:32:31,438 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 125 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-09-01 01:32:31,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 939 flow [2023-09-01 01:32:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1898 transitions. [2023-09-01 01:32:31,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44180633147113596 [2023-09-01 01:32:31,446 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1898 transitions. [2023-09-01 01:32:31,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1898 transitions. [2023-09-01 01:32:31,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:31,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1898 transitions. [2023-09-01 01:32:31,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 237.25) internal successors, (1898), 8 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 01:32:31,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:31,452 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 01:32:31,452 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 236 flow. Second operand 8 states and 1898 transitions. [2023-09-01 01:32:31,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 939 flow [2023-09-01 01:32:31,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 131 transitions, 921 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-09-01 01:32:31,459 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 210 flow [2023-09-01 01:32:31,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2023-09-01 01:32:31,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2023-09-01 01:32:31,459 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 210 flow [2023-09-01 01:32:31,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 227.57142857142858) internal successors, (3186), 14 states have internal predecessors, (3186), 0 states have call successors, (0), 0 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 01:32:31,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:31,460 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:31,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:31,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:31,674 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:31,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 105872388, now seen corresponding path program 2 times [2023-09-01 01:32:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:31,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130324456] [2023-09-01 01:32:31,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:32:31,675 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 01:32:31,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:31,676 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:31,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 01:32:31,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:32:31,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:32:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:31,966 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:32:31,966 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:32:32,002 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:32:32,002 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:32:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:32,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:32:32,058 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:32,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:32:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:32,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:32,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:32,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130324456] [2023-09-01 01:32:32,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130324456] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:32,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:32,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 01:32:32,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010884024] [2023-09-01 01:32:32,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:32,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:32:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:32:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:32:36,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-09-01 01:32:36,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 210 flow. Second operand has 16 states, 16 states have (on average 213.0) internal successors, (3408), 16 states have internal predecessors, (3408), 0 states have call successors, (0), 0 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 01:32:36,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:36,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-09-01 01:32:36,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:38,778 INFO L130 PetriNetUnfolder]: 1591/2974 cut-off events. [2023-09-01 01:32:38,778 INFO L131 PetriNetUnfolder]: For 2526/2526 co-relation queries the response was YES. [2023-09-01 01:32:38,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 2974 events. 1591/2974 cut-off events. For 2526/2526 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 16173 event pairs, 153 based on Foata normal form. 168/3142 useless extension candidates. Maximal degree in co-relation 8460. Up to 540 conditions per place. [2023-09-01 01:32:38,789 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 188 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2023-09-01 01:32:38,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 202 transitions, 1252 flow [2023-09-01 01:32:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:32:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:32:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3110 transitions. [2023-09-01 01:32:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41367384942803936 [2023-09-01 01:32:38,794 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3110 transitions. [2023-09-01 01:32:38,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3110 transitions. [2023-09-01 01:32:38,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:38,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3110 transitions. [2023-09-01 01:32:38,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 222.14285714285714) internal successors, (3110), 14 states have internal predecessors, (3110), 0 states have call successors, (0), 0 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 01:32:38,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 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 01:32:38,823 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 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 01:32:38,823 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 210 flow. Second operand 14 states and 3110 transitions. [2023-09-01 01:32:38,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 202 transitions, 1252 flow [2023-09-01 01:32:38,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 202 transitions, 1131 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:32:38,829 INFO L231 Difference]: Finished difference. Result has 77 places, 44 transitions, 304 flow [2023-09-01 01:32:38,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304, PETRI_PLACES=77, PETRI_TRANSITIONS=44} [2023-09-01 01:32:38,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2023-09-01 01:32:38,830 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 44 transitions, 304 flow [2023-09-01 01:32:38,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 213.0) internal successors, (3408), 16 states have internal predecessors, (3408), 0 states have call successors, (0), 0 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 01:32:38,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:38,831 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:38,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:39,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:39,044 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:39,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1672271916, now seen corresponding path program 1 times [2023-09-01 01:32:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587932464] [2023-09-01 01:32:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:39,045 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 01:32:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:39,046 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:39,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 01:32:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:39,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:32:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:39,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:39,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587932464] [2023-09-01 01:32:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587932464] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284835947] [2023-09-01 01:32:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:39,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:39,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-09-01 01:32:39,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 44 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 01:32:39,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:39,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-09-01 01:32:39,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:39,733 INFO L130 PetriNetUnfolder]: 1589/2972 cut-off events. [2023-09-01 01:32:39,733 INFO L131 PetriNetUnfolder]: For 3270/3270 co-relation queries the response was YES. [2023-09-01 01:32:39,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 2972 events. 1589/2972 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 16656 event pairs, 1319 based on Foata normal form. 2/2974 useless extension candidates. Maximal degree in co-relation 8895. Up to 2525 conditions per place. [2023-09-01 01:32:39,742 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 81 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-09-01 01:32:39,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 811 flow [2023-09-01 01:32:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 937 transitions. [2023-09-01 01:32:39,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436219739292365 [2023-09-01 01:32:39,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 937 transitions. [2023-09-01 01:32:39,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 937 transitions. [2023-09-01 01:32:39,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:39,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 937 transitions. [2023-09-01 01:32:39,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 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 01:32:39,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:39,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:39,747 INFO L175 Difference]: Start difference. First operand has 77 places, 44 transitions, 304 flow. Second operand 4 states and 937 transitions. [2023-09-01 01:32:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 811 flow [2023-09-01 01:32:39,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 743 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-09-01 01:32:39,755 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 294 flow [2023-09-01 01:32:39,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2023-09-01 01:32:39,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2023-09-01 01:32:39,755 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 294 flow [2023-09-01 01:32:39,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 01:32:39,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:39,756 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:39,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:39,967 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:39,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1610188816, now seen corresponding path program 2 times [2023-09-01 01:32:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064533459] [2023-09-01 01:32:39,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:32:39,967 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 01:32:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:39,969 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 01:32:40,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:32:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:32:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:40,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:40,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:40,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064533459] [2023-09-01 01:32:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064533459] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:40,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152204929] [2023-09-01 01:32:40,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:40,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:40,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:40,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-09-01 01:32:40,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 01:32:40,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:40,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-09-01 01:32:40,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:40,686 INFO L130 PetriNetUnfolder]: 1585/2968 cut-off events. [2023-09-01 01:32:40,686 INFO L131 PetriNetUnfolder]: For 3007/3007 co-relation queries the response was YES. [2023-09-01 01:32:40,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 2968 events. 1585/2968 cut-off events. For 3007/3007 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16332 event pairs, 1422 based on Foata normal form. 4/2972 useless extension candidates. Maximal degree in co-relation 9498. Up to 2712 conditions per place. [2023-09-01 01:32:40,696 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 67 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-09-01 01:32:40,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 540 flow [2023-09-01 01:32:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 936 transitions. [2023-09-01 01:32:40,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2023-09-01 01:32:40,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 936 transitions. [2023-09-01 01:32:40,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 936 transitions. [2023-09-01 01:32:40,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:40,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 936 transitions. [2023-09-01 01:32:40,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 01:32:40,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:40,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:40,702 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 294 flow. Second operand 4 states and 936 transitions. [2023-09-01 01:32:40,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 540 flow [2023-09-01 01:32:40,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 01:32:40,710 INFO L231 Difference]: Finished difference. Result has 78 places, 46 transitions, 304 flow [2023-09-01 01:32:40,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2023-09-01 01:32:40,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2023-09-01 01:32:40,711 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 304 flow [2023-09-01 01:32:40,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 01:32:40,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:40,711 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:40,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:40,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:40,921 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:40,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1666920102, now seen corresponding path program 3 times [2023-09-01 01:32:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106435679] [2023-09-01 01:32:40,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:32:40,922 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 01:32:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:40,923 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:40,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 01:32:41,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 01:32:41,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:32:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:41,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:41,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:41,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106435679] [2023-09-01 01:32:41,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106435679] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:41,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:41,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021658855] [2023-09-01 01:32:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:41,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:41,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-09-01 01:32:41,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 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 01:32:41,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:41,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-09-01 01:32:41,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:41,690 INFO L130 PetriNetUnfolder]: 1706/3177 cut-off events. [2023-09-01 01:32:41,690 INFO L131 PetriNetUnfolder]: For 3934/3934 co-relation queries the response was YES. [2023-09-01 01:32:41,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10440 conditions, 3177 events. 1706/3177 cut-off events. For 3934/3934 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 17774 event pairs, 1319 based on Foata normal form. 88/3265 useless extension candidates. Maximal degree in co-relation 10410. Up to 2613 conditions per place. [2023-09-01 01:32:41,702 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 84 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-09-01 01:32:41,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 805 flow [2023-09-01 01:32:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 930 transitions. [2023-09-01 01:32:41,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329608938547486 [2023-09-01 01:32:41,705 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 930 transitions. [2023-09-01 01:32:41,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 930 transitions. [2023-09-01 01:32:41,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:41,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 930 transitions. [2023-09-01 01:32:41,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 0 states have call successors, (0), 0 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 01:32:41,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:41,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:41,708 INFO L175 Difference]: Start difference. First operand has 78 places, 46 transitions, 304 flow. Second operand 4 states and 930 transitions. [2023-09-01 01:32:41,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 805 flow [2023-09-01 01:32:41,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 795 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:32:41,717 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 331 flow [2023-09-01 01:32:41,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2023-09-01 01:32:41,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-09-01 01:32:41,718 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 331 flow [2023-09-01 01:32:41,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 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 01:32:41,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:41,718 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:41,727 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 (29)] Ended with exit code 0 [2023-09-01 01:32:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:41,927 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:41,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1484187432, now seen corresponding path program 4 times [2023-09-01 01:32:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936683826] [2023-09-01 01:32:41,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:32:41,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:41,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:41,929 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:41,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 01:32:42,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:32:42,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:32:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:42,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:42,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936683826] [2023-09-01 01:32:42,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936683826] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:42,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:42,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663109900] [2023-09-01 01:32:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:42,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2023-09-01 01:32:42,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:42,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:42,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2023-09-01 01:32:42,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:42,696 INFO L130 PetriNetUnfolder]: 1585/2946 cut-off events. [2023-09-01 01:32:42,696 INFO L131 PetriNetUnfolder]: For 3804/3804 co-relation queries the response was YES. [2023-09-01 01:32:42,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10054 conditions, 2946 events. 1585/2946 cut-off events. For 3804/3804 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 16448 event pairs, 12 based on Foata normal form. 88/3034 useless extension candidates. Maximal degree in co-relation 10022. Up to 2700 conditions per place. [2023-09-01 01:32:42,706 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 70 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2023-09-01 01:32:42,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 677 flow [2023-09-01 01:32:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-09-01 01:32:42,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43202979515828677 [2023-09-01 01:32:42,708 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-09-01 01:32:42,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-09-01 01:32:42,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:42,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-09-01 01:32:42,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 01:32:42,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:42,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:42,714 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 331 flow. Second operand 4 states and 928 transitions. [2023-09-01 01:32:42,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 677 flow [2023-09-01 01:32:42,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 670 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:32:42,722 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 355 flow [2023-09-01 01:32:42,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2023-09-01 01:32:42,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-09-01 01:32:42,725 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 355 flow [2023-09-01 01:32:42,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:42,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:42,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:42,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:42,936 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:42,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -615401300, now seen corresponding path program 1 times [2023-09-01 01:32:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:42,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899998835] [2023-09-01 01:32:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:42,937 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 01:32:42,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:42,937 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:42,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 01:32:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:32:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 01:32:43,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:43,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:43,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899998835] [2023-09-01 01:32:43,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899998835] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:43,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:43,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271001919] [2023-09-01 01:32:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:43,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:43,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2023-09-01 01:32:43,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 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 01:32:43,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:43,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2023-09-01 01:32:43,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:43,737 INFO L130 PetriNetUnfolder]: 1635/3030 cut-off events. [2023-09-01 01:32:43,738 INFO L131 PetriNetUnfolder]: For 6953/6953 co-relation queries the response was YES. [2023-09-01 01:32:43,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 3030 events. 1635/3030 cut-off events. For 6953/6953 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 16892 event pairs, 159 based on Foata normal form. 22/3052 useless extension candidates. Maximal degree in co-relation 10462. Up to 2662 conditions per place. [2023-09-01 01:32:43,750 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 70 selfloop transitions, 7 changer transitions 1/78 dead transitions. [2023-09-01 01:32:43,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 713 flow [2023-09-01 01:32:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 927 transitions. [2023-09-01 01:32:43,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43156424581005587 [2023-09-01 01:32:43,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 927 transitions. [2023-09-01 01:32:43,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 927 transitions. [2023-09-01 01:32:43,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:43,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 927 transitions. [2023-09-01 01:32:43,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 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 01:32:43,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:43,755 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:43,755 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 355 flow. Second operand 4 states and 927 transitions. [2023-09-01 01:32:43,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 713 flow [2023-09-01 01:32:43,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 697 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 01:32:43,762 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 392 flow [2023-09-01 01:32:43,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2023-09-01 01:32:43,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-09-01 01:32:43,762 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 392 flow [2023-09-01 01:32:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 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 01:32:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:43,763 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:43,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:43,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:43,973 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:43,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:43,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1225860184, now seen corresponding path program 2 times [2023-09-01 01:32:43,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:43,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296126822] [2023-09-01 01:32:43,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:32:43,974 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 01:32:43,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:43,975 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:43,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 01:32:44,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:32:44,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:32:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:32:44,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:44,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296126822] [2023-09-01 01:32:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296126822] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:44,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056317630] [2023-09-01 01:32:44,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:44,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:44,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-09-01 01:32:44,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 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 01:32:44,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:44,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-09-01 01:32:44,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:44,815 INFO L130 PetriNetUnfolder]: 1584/2925 cut-off events. [2023-09-01 01:32:44,815 INFO L131 PetriNetUnfolder]: For 5855/5855 co-relation queries the response was YES. [2023-09-01 01:32:44,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 2925 events. 1584/2925 cut-off events. For 5855/5855 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 15741 event pairs, 1163 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 10193. Up to 2709 conditions per place. [2023-09-01 01:32:44,830 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 66 selfloop transitions, 7 changer transitions 3/76 dead transitions. [2023-09-01 01:32:44,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 653 flow [2023-09-01 01:32:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-09-01 01:32:44,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43202979515828677 [2023-09-01 01:32:44,832 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-09-01 01:32:44,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-09-01 01:32:44,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:44,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-09-01 01:32:44,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 01:32:44,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:44,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 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 01:32:44,835 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 392 flow. Second operand 4 states and 928 transitions. [2023-09-01 01:32:44,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 653 flow [2023-09-01 01:32:44,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 76 transitions, 643 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:32:44,845 INFO L231 Difference]: Finished difference. Result has 88 places, 52 transitions, 416 flow [2023-09-01 01:32:44,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=88, PETRI_TRANSITIONS=52} [2023-09-01 01:32:44,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-09-01 01:32:44,846 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 52 transitions, 416 flow [2023-09-01 01:32:44,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 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 01:32:44,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:44,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:44,854 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 (32)] Ended with exit code 0 [2023-09-01 01:32:45,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:45,049 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:32:45,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1813639431, now seen corresponding path program 1 times [2023-09-01 01:32:45,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020028281] [2023-09-01 01:32:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:45,050 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 01:32:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:45,051 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:45,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-09-01 01:32:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 01:32:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:46,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:32:46,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 557 treesize of output 317 [2023-09-01 01:33:06,852 WARN L222 SmtUtils]: Spent 17.96s on a formula simplification. DAG size of input: 97 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:33:26,192 WARN L222 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 80 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:33:35,610 WARN L222 SmtUtils]: Spent 8.44s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:33:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:33:36,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:20,837 WARN L222 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 362 DAG size of output: 234 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 01:34:20,839 INFO L321 Elim1Store]: treesize reduction 420, result has 66.7 percent of original size [2023-09-01 01:34:20,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 500 treesize of output 963 Killed by 15