./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --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 02:42:29,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:42:29,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:42:29,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:42:29,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:42:29,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:42:29,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:42:29,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:42:29,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:42:29,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:42:29,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:42:29,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:42:29,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:42:29,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:42:29,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:42:29,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:42:29,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:42:29,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:42:29,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:42:29,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:42:29,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:42:29,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:42:29,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:42:29,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:42:29,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:42:29,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:42:29,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:42:29,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:42:29,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:42:29,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:42:29,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:42:29,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:42:29,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:42:29,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:42:29,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:42:29,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:42:29,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:42:29,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:42:29,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:42:29,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:42:29,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:42:29,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:42:29,505 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:42:29,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:42:29,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:42:29,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:42:29,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:42:29,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:42:29,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:42:29,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:42:29,507 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:42:29,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:42:29,508 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:42:29,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:42:29,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:42:29,510 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:42:29,510 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:42:29,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:42:29,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:42:29,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:42:29,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:42:29,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:42:29,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:42:29,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:42:29,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:42:29,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:42:29,511 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:42:29,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:42:29,512 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:42:29,512 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:42:29,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:42:29,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:42:29,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:42:29,774 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:42:29,774 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:42:29,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-09-01 02:42:30,778 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:42:30,956 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:42:30,956 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-09-01 02:42:30,962 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec3a08d6/123929dc9e6948cd80262972d473c3f5/FLAG831ac45a7 [2023-09-01 02:42:30,977 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec3a08d6/123929dc9e6948cd80262972d473c3f5 [2023-09-01 02:42:30,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:42:30,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:42:30,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:42:30,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:42:30,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:42:30,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:42:30" (1/1) ... [2023-09-01 02:42:30,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd5d50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:30, skipping insertion in model container [2023-09-01 02:42:30,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:42:30" (1/1) ... [2023-09-01 02:42:30,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:42:31,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:42:31,153 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-09-01 02:42:31,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:42:31,171 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 02:42:31,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@459568f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:31, skipping insertion in model container [2023-09-01 02:42:31,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:42:31,174 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:42:31,176 INFO L158 Benchmark]: Toolchain (without parser) took 195.03ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 34.5MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:42:31,176 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory was 44.9MB in the beginning and 44.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:42:31,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.30ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 34.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:42:31,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory was 44.9MB in the beginning and 44.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.30ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 34.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 96]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --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 02:42:32,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:42:32,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:42:32,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:42:32,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:42:32,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:42:32,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:42:32,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:42:32,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:42:32,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:42:32,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:42:32,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:42:32,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:42:32,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:42:32,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:42:32,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:42:32,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:42:32,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:42:32,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:42:32,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:42:32,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:42:32,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:42:32,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:42:32,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:42:32,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:42:32,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:42:32,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:42:32,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:42:32,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:42:32,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:42:32,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:42:32,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:42:32,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:42:32,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:42:32,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:42:32,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:42:32,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:42:32,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:42:32,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:42:32,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:42:32,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:42:32,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:42:33,025 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:42:33,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:42:33,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:42:33,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:42:33,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:42:33,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:42:33,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:42:33,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:42:33,028 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:42:33,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:42:33,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:42:33,030 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:42:33,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:42:33,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:42:33,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:42:33,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:42:33,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:42:33,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:42:33,032 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:42:33,032 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:42:33,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:42:33,032 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:42:33,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:42:33,033 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:42:33,033 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:42:33,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:42:33,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:42:33,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:42:33,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:42:33,327 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:42:33,327 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:42:33,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-09-01 02:42:34,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:42:34,578 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:42:34,578 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-09-01 02:42:34,585 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a728471d2/65875902cde04dc8be54923fc14f1fb1/FLAG4714b85ce [2023-09-01 02:42:34,596 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a728471d2/65875902cde04dc8be54923fc14f1fb1 [2023-09-01 02:42:34,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:42:34,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:42:34,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:42:34,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:42:34,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:42:34,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e98ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34, skipping insertion in model container [2023-09-01 02:42:34,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:42:34,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:42:34,704 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-09-01 02:42:34,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:42:34,719 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:42:34,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:42:34,727 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-09-01 02:42:34,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:42:34,735 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:42:34,747 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-09-01 02:42:34,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:42:34,757 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:42:34,757 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:42:34,761 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:42:34,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34 WrapperNode [2023-09-01 02:42:34,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:42:34,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:42:34,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:42:34,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:42:34,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,793 INFO L138 Inliner]: procedures = 28, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2023-09-01 02:42:34,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:42:34,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:42:34,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:42:34,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:42:34,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:42:34,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:42:34,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:42:34,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:42:34,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (1/1) ... [2023-09-01 02:42:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:42:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:42:34,875 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 02:42:34,889 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 02:42:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:42:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:42:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:42:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:42:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:42:34,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:42:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:42:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:42:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:42:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:42:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:42:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:42:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:42:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:42:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:42:34,910 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 02:42:34,984 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:42:34,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:42:35,297 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:42:35,403 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:42:35,406 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 02:42:35,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:42:35 BoogieIcfgContainer [2023-09-01 02:42:35,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:42:35,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:42:35,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:42:35,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:42:35,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:42:34" (1/3) ... [2023-09-01 02:42:35,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556a81ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:42:35, skipping insertion in model container [2023-09-01 02:42:35,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:42:34" (2/3) ... [2023-09-01 02:42:35,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556a81ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:42:35, skipping insertion in model container [2023-09-01 02:42:35,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:42:35" (3/3) ... [2023-09-01 02:42:35,427 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-09-01 02:42:35,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:42:35,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 02:42:35,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:42:35,523 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 02:42:35,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 127 transitions, 270 flow [2023-09-01 02:42:35,620 INFO L130 PetriNetUnfolder]: 9/125 cut-off events. [2023-09-01 02:42:35,621 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:42:35,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 9/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-09-01 02:42:35,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 127 transitions, 270 flow [2023-09-01 02:42:35,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 121 transitions, 254 flow [2023-09-01 02:42:35,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:42:35,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 121 transitions, 254 flow [2023-09-01 02:42:35,661 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 121 transitions, 254 flow [2023-09-01 02:42:35,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 254 flow [2023-09-01 02:42:35,682 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-09-01 02:42:35,688 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:42:35,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 121 events. 9/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-09-01 02:42:35,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-09-01 02:42:44,605 INFO L134 LiptonReduction]: Checked pairs total: 1568 [2023-09-01 02:42:44,605 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-09-01 02:42:44,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:42:44,618 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;@336d96ab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:42:44,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-09-01 02:42:44,620 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:42:44,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:42:44,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:44,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:42:44,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:44,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 18618, now seen corresponding path program 1 times [2023-09-01 02:42:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352650694] [2023-09-01 02:42:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:44,633 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 02:42:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:44,635 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 02:42:44,665 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 02:42:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:42:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:44,824 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:42:44,825 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 02:42:44,857 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 02:42:44,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:44,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352650694] [2023-09-01 02:42:44,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352650694] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:44,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:44,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:42:44,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846739958] [2023-09-01 02:42:44,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:42:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:42:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:42:44,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-09-01 02:42:44,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 02:42:44,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:44,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-09-01 02:42:44,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:45,193 INFO L130 PetriNetUnfolder]: 429/628 cut-off events. [2023-09-01 02:42:45,194 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 02:42:45,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 628 events. 429/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2670 event pairs, 222 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 1124. Up to 622 conditions per place. [2023-09-01 02:42:45,202 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 02:42:45,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2023-09-01 02:42:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-09-01 02:42:45,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47277556440903057 [2023-09-01 02:42:45,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-09-01 02:42:45,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-09-01 02:42:45,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:45,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-09-01 02:42:45,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 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 02:42:45,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:45,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:45,229 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 356 transitions. [2023-09-01 02:42:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2023-09-01 02:42:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:42:45,235 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-09-01 02:42:45,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-09-01 02:42:45,239 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-09-01 02:42:45,239 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-09-01 02:42:45,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 02:42:45,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:45,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:42:45,265 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 02:42:45,449 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 02:42:45,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:45,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:45,450 INFO L85 PathProgramCache]: Analyzing trace with hash 18619, now seen corresponding path program 1 times [2023-09-01 02:42:45,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:45,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102448676] [2023-09-01 02:42:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:45,451 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 02:42:45,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:45,454 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 02:42:45,457 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 02:42:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:45,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:42:45,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:45,603 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:45,603 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 14 treesize of output 29 [2023-09-01 02:42:45,626 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 02:42:45,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:45,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:45,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102448676] [2023-09-01 02:42:45,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102448676] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:45,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:45,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:42:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744330927] [2023-09-01 02:42:45,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:45,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:42:45,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:42:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:42:45,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-09-01 02:42:45,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 02:42:45,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:45,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-09-01 02:42:45,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:46,022 INFO L130 PetriNetUnfolder]: 857/1254 cut-off events. [2023-09-01 02:42:46,024 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:42:46,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2514 conditions, 1254 events. 857/1254 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 6094 event pairs, 444 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 2508. Up to 623 conditions per place. [2023-09-01 02:42:46,030 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 56 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-09-01 02:42:46,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 60 transitions, 246 flow [2023-09-01 02:42:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-09-01 02:42:46,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086321381142098 [2023-09-01 02:42:46,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-09-01 02:42:46,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-09-01 02:42:46,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:46,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-09-01 02:42:46,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 02:42:46,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:46,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:46,049 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 383 transitions. [2023-09-01 02:42:46,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 60 transitions, 246 flow [2023-09-01 02:42:46,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:46,050 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 81 flow [2023-09-01 02:42:46,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-09-01 02:42:46,051 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-09-01 02:42:46,051 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 81 flow [2023-09-01 02:42:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 02:42:46,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:46,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:42:46,060 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 02:42:46,251 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 02:42:46,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:46,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 18644, now seen corresponding path program 1 times [2023-09-01 02:42:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:46,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42123768] [2023-09-01 02:42:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:46,253 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 02:42:46,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:46,256 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 02:42:46,258 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 02:42:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:42:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:46,332 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:42:46,332 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 02:42:46,344 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 02:42:46,380 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 02:42:46,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:46,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:46,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42123768] [2023-09-01 02:42:46,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42123768] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:46,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:46,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:42:46,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625437821] [2023-09-01 02:42:46,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:46,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:42:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:42:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:42:46,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-09-01 02:42:46,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 02:42:46,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:46,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-09-01 02:42:46,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:46,669 INFO L130 PetriNetUnfolder]: 651/974 cut-off events. [2023-09-01 02:42:46,670 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:42:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 974 events. 651/974 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 4667 event pairs, 334 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1952. Up to 962 conditions per place. [2023-09-01 02:42:46,675 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 02:42:46,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 135 flow [2023-09-01 02:42:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-09-01 02:42:46,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701195219123506 [2023-09-01 02:42:46,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-09-01 02:42:46,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-09-01 02:42:46,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:46,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-09-01 02:42:46,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 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 02:42:46,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:46,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:46,684 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 81 flow. Second operand 3 states and 354 transitions. [2023-09-01 02:42:46,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 135 flow [2023-09-01 02:42:46,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:46,686 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-09-01 02:42:46,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-09-01 02:42:46,687 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-09-01 02:42:46,687 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-09-01 02:42:46,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 02:42:46,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:46,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:42:46,713 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 02:42:46,897 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 02:42:46,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:46,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash 18646, now seen corresponding path program 1 times [2023-09-01 02:42:46,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:46,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389896387] [2023-09-01 02:42:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:46,898 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 02:42:46,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:46,915 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 02:42:46,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:42:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:42:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:46,990 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-09-01 02:42:46,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 02:42:47,006 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 02:42:47,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:47,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:47,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389896387] [2023-09-01 02:42:47,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389896387] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:47,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:47,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:42:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479500648] [2023-09-01 02:42:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:47,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:42:47,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:42:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:42:47,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 251 [2023-09-01 02:42:47,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 02:42:47,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:47,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 251 [2023-09-01 02:42:47,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:47,179 INFO L130 PetriNetUnfolder]: 445/694 cut-off events. [2023-09-01 02:42:47,179 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:42:47,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 694 events. 445/694 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3260 event pairs, 224 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 1391. Up to 682 conditions per place. [2023-09-01 02:42:47,182 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-09-01 02:42:47,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 127 flow [2023-09-01 02:42:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-09-01 02:42:47,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555112881806109 [2023-09-01 02:42:47,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-09-01 02:42:47,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-09-01 02:42:47,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:47,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-09-01 02:42:47,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 02:42:47,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:47,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:47,186 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 343 transitions. [2023-09-01 02:42:47,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 127 flow [2023-09-01 02:42:47,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:47,187 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 74 flow [2023-09-01 02:42:47,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-09-01 02:42:47,188 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-09-01 02:42:47,188 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 74 flow [2023-09-01 02:42:47,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 02:42:47,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:47,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:42:47,198 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 02:42:47,395 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 02:42:47,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:47,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash 578572, now seen corresponding path program 1 times [2023-09-01 02:42:47,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:47,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820343590] [2023-09-01 02:42:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:47,396 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 02:42:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:47,397 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 02:42:47,399 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 02:42:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:47,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:42:47,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:47,505 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:47,506 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 14 treesize of output 29 [2023-09-01 02:42:47,560 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 02:42:47,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:42:47,694 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 02:42:47,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820343590] [2023-09-01 02:42:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820343590] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:42:47,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:42:47,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:42:47,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87393948] [2023-09-01 02:42:47,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:42:47,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:42:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:42:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:42:48,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-09-01 02:42:48,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 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 02:42:48,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:48,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-09-01 02:42:48,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:48,402 INFO L130 PetriNetUnfolder]: 669/1044 cut-off events. [2023-09-01 02:42:48,402 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:42:48,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 1044 events. 669/1044 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5345 event pairs, 336 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 2095. Up to 342 conditions per place. [2023-09-01 02:42:48,405 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-09-01 02:42:48,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 346 flow [2023-09-01 02:42:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:42:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:42:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 699 transitions. [2023-09-01 02:42:48,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641434262948207 [2023-09-01 02:42:48,407 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 699 transitions. [2023-09-01 02:42:48,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 699 transitions. [2023-09-01 02:42:48,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:48,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 699 transitions. [2023-09-01 02:42:48,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 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 02:42:48,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 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 02:42:48,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 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 02:42:48,411 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 74 flow. Second operand 6 states and 699 transitions. [2023-09-01 02:42:48,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 346 flow [2023-09-01 02:42:48,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:48,413 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 127 flow [2023-09-01 02:42:48,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-09-01 02:42:48,413 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 02:42:48,414 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 127 flow [2023-09-01 02:42:48,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 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 02:42:48,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:48,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:42:48,425 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 02:42:48,620 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 02:42:48,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:48,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash 17931614, now seen corresponding path program 1 times [2023-09-01 02:42:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:48,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057452174] [2023-09-01 02:42:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:48,622 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 02:42:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:48,623 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 02:42:48,625 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 02:42:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:42:48,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:48,780 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-09-01 02:42:48,781 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 29 [2023-09-01 02:42:48,795 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 02:42:48,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:48,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057452174] [2023-09-01 02:42:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057452174] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:42:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488961959] [2023-09-01 02:42:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:48,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:42:48,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:42:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:42:48,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 251 [2023-09-01 02:42:48,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 02:42:48,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:48,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 251 [2023-09-01 02:42:48,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:49,051 INFO L130 PetriNetUnfolder]: 618/957 cut-off events. [2023-09-01 02:42:49,052 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:42:49,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 957 events. 618/957 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 4748 event pairs, 309 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1942. Up to 939 conditions per place. [2023-09-01 02:42:49,055 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 02:42:49,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 183 flow [2023-09-01 02:42:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-09-01 02:42:49,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45285524568393093 [2023-09-01 02:42:49,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-09-01 02:42:49,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-09-01 02:42:49,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:49,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-09-01 02:42:49,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 02:42:49,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:49,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:49,060 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 127 flow. Second operand 3 states and 341 transitions. [2023-09-01 02:42:49,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 183 flow [2023-09-01 02:42:49,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:49,061 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 115 flow [2023-09-01 02:42:49,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-09-01 02:42:49,062 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-09-01 02:42:49,062 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 115 flow [2023-09-01 02:42:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 02:42:49,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:49,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:42:49,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:42:49,269 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 02:42:49,270 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:49,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 17931615, now seen corresponding path program 1 times [2023-09-01 02:42:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:49,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844142132] [2023-09-01 02:42:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:49,270 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 02:42:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:49,272 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 02:42:49,277 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 02:42:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:42:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:49,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:49,357 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:42:49,358 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 02:42:49,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:42:49,385 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 02:42:49,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:49,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:49,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844142132] [2023-09-01 02:42:49,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844142132] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:49,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:49,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:42:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923575264] [2023-09-01 02:42:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:49,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:42:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:42:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:42:49,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-09-01 02:42:49,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 02:42:49,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:49,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-09-01 02:42:49,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:49,549 INFO L130 PetriNetUnfolder]: 567/870 cut-off events. [2023-09-01 02:42:49,549 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 02:42:49,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1780 conditions, 870 events. 567/870 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4220 event pairs, 282 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 1764. Up to 852 conditions per place. [2023-09-01 02:42:49,552 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 02:42:49,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 167 flow [2023-09-01 02:42:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-09-01 02:42:49,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215139442231074 [2023-09-01 02:42:49,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-09-01 02:42:49,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-09-01 02:42:49,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:49,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-09-01 02:42:49,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 02:42:49,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:49,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:42:49,556 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 115 flow. Second operand 3 states and 348 transitions. [2023-09-01 02:42:49,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 167 flow [2023-09-01 02:42:49,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:49,557 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 112 flow [2023-09-01 02:42:49,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-09-01 02:42:49,558 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-09-01 02:42:49,558 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 112 flow [2023-09-01 02:42:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 02:42:49,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:49,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:42:49,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:42:49,765 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 02:42:49,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:49,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 555876363, now seen corresponding path program 1 times [2023-09-01 02:42:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027075166] [2023-09-01 02:42:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:49,766 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 02:42:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:49,767 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 02:42:49,769 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 02:42:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:42:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:49,836 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:42:49,836 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 02:42:49,850 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 02:42:49,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:49,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:49,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027075166] [2023-09-01 02:42:49,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027075166] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:49,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:49,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:42:49,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232927897] [2023-09-01 02:42:49,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:49,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:42:49,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:42:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:42:49,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-09-01 02:42:49,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 02:42:49,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:49,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-09-01 02:42:49,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:50,051 INFO L130 PetriNetUnfolder]: 378/603 cut-off events. [2023-09-01 02:42:50,051 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 02:42:50,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 603 events. 378/603 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2769 event pairs, 189 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1230. Up to 581 conditions per place. [2023-09-01 02:42:50,053 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-09-01 02:42:50,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2023-09-01 02:42:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:42:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:42:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-09-01 02:42:50,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362549800796813 [2023-09-01 02:42:50,055 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-09-01 02:42:50,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-09-01 02:42:50,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:50,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-09-01 02:42:50,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 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 02:42:50,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 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 02:42:50,057 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 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 02:42:50,057 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 112 flow. Second operand 4 states and 438 transitions. [2023-09-01 02:42:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2023-09-01 02:42:50,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:50,058 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2023-09-01 02:42:50,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-09-01 02:42:50,059 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-09-01 02:42:50,059 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2023-09-01 02:42:50,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 02:42:50,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:50,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:42:50,068 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 02:42:50,266 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 02:42:50,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:50,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:50,267 INFO L85 PathProgramCache]: Analyzing trace with hash 555876364, now seen corresponding path program 1 times [2023-09-01 02:42:50,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:50,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850720206] [2023-09-01 02:42:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:50,268 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 02:42:50,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:50,269 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 02:42:50,272 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 02:42:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:42:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:50,386 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:50,386 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 14 treesize of output 29 [2023-09-01 02:42:50,447 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 02:42:50,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:50,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850720206] [2023-09-01 02:42:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850720206] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:50,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:42:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127175296] [2023-09-01 02:42:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:42:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:42:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:42:50,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-09-01 02:42:50,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 02:42:50,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:50,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-09-01 02:42:50,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:50,835 INFO L130 PetriNetUnfolder]: 564/933 cut-off events. [2023-09-01 02:42:50,835 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 02:42:50,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 933 events. 564/933 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4641 event pairs, 177 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1913. Up to 548 conditions per place. [2023-09-01 02:42:50,838 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-09-01 02:42:50,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 228 flow [2023-09-01 02:42:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:42:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:42:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-09-01 02:42:50,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43904382470119524 [2023-09-01 02:42:50,840 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-09-01 02:42:50,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-09-01 02:42:50,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:50,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-09-01 02:42:50,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 02:42:50,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:42:50,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:42:50,844 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 551 transitions. [2023-09-01 02:42:50,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 228 flow [2023-09-01 02:42:50,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 223 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:42:50,846 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 130 flow [2023-09-01 02:42:50,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-09-01 02:42:50,847 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-09-01 02:42:50,847 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 130 flow [2023-09-01 02:42:50,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 02:42:50,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:50,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:42:50,870 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 02:42:51,054 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 02:42:51,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:51,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 57742587, now seen corresponding path program 2 times [2023-09-01 02:42:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435781741] [2023-09-01 02:42:51,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:42:51,056 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 02:42:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:51,057 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 02:42:51,081 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 02:42:51,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:42:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:42:51,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:42:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:51,173 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:51,173 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 14 treesize of output 29 [2023-09-01 02:42:51,276 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 02:42:51,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:42:51,716 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 02:42:51,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:51,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435781741] [2023-09-01 02:42:51,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435781741] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:42:51,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:42:51,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:42:51,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192189590] [2023-09-01 02:42:51,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:42:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:42:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:51,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:42:51,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:42:53,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-09-01 02:42:53,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 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 02:42:53,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:53,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-09-01 02:42:53,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:56,315 INFO L130 PetriNetUnfolder]: 1642/2754 cut-off events. [2023-09-01 02:42:56,315 INFO L131 PetriNetUnfolder]: For 290/390 co-relation queries the response was YES. [2023-09-01 02:42:56,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 2754 events. 1642/2754 cut-off events. For 290/390 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16894 event pairs, 1040 based on Foata normal form. 106/1969 useless extension candidates. Maximal degree in co-relation 6085. Up to 351 conditions per place. [2023-09-01 02:42:56,326 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-09-01 02:42:56,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 196 transitions, 1031 flow [2023-09-01 02:42:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:42:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:42:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1438 transitions. [2023-09-01 02:42:56,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47742363877822047 [2023-09-01 02:42:56,330 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1438 transitions. [2023-09-01 02:42:56,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1438 transitions. [2023-09-01 02:42:56,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:56,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1438 transitions. [2023-09-01 02:42:56,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 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 02:42:56,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 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 02:42:56,336 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 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 02:42:56,336 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 130 flow. Second operand 12 states and 1438 transitions. [2023-09-01 02:42:56,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 196 transitions, 1031 flow [2023-09-01 02:42:56,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 196 transitions, 996 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 02:42:56,340 INFO L231 Difference]: Finished difference. Result has 58 places, 36 transitions, 219 flow [2023-09-01 02:42:56,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=36} [2023-09-01 02:42:56,342 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-09-01 02:42:56,342 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 36 transitions, 219 flow [2023-09-01 02:42:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 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 02:42:56,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:56,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:42:56,363 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 02:42:56,550 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 02:42:56,550 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:56,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1621259161, now seen corresponding path program 1 times [2023-09-01 02:42:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300962455] [2023-09-01 02:42:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:56,551 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 02:42:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:56,552 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 02:42:56,554 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 (12)] Waiting until timeout for monitored process [2023-09-01 02:42:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:42:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:56,690 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:56,690 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 14 treesize of output 29 [2023-09-01 02:42:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:42:56,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:56,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:56,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300962455] [2023-09-01 02:42:56,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300962455] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:56,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:56,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:42:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031721159] [2023-09-01 02:42:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:56,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:42:56,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:42:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:42:57,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-09-01 02:42:57,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 36 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:57,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:57,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-09-01 02:42:57,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:57,547 INFO L130 PetriNetUnfolder]: 1655/2790 cut-off events. [2023-09-01 02:42:57,547 INFO L131 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2023-09-01 02:42:57,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 2790 events. 1655/2790 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16405 event pairs, 1063 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 6137. Up to 2696 conditions per place. [2023-09-01 02:42:57,560 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 49 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-09-01 02:42:57,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 373 flow [2023-09-01 02:42:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:42:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:42:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-09-01 02:42:57,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446215139442231 [2023-09-01 02:42:57,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-09-01 02:42:57,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-09-01 02:42:57,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:57,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-09-01 02:42:57,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 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 02:42:57,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:42:57,566 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:42:57,566 INFO L175 Difference]: Start difference. First operand has 58 places, 36 transitions, 219 flow. Second operand 5 states and 558 transitions. [2023-09-01 02:42:57,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 373 flow [2023-09-01 02:42:57,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 02:42:57,569 INFO L231 Difference]: Finished difference. Result has 61 places, 38 transitions, 229 flow [2023-09-01 02:42:57,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=38} [2023-09-01 02:42:57,569 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-09-01 02:42:57,569 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 38 transitions, 229 flow [2023-09-01 02:42:57,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:57,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:57,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:42:57,581 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 02:42:57,781 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 02:42:57,781 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:57,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:57,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1625249170, now seen corresponding path program 1 times [2023-09-01 02:42:57,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:57,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871847579] [2023-09-01 02:42:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:57,783 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 02:42:57,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:57,797 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 02:42:57,828 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 02:42:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:42:57,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:57,916 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:57,917 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 14 treesize of output 29 [2023-09-01 02:42:58,010 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 02:42:58,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:58,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:58,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871847579] [2023-09-01 02:42:58,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871847579] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:58,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:58,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:42:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051864924] [2023-09-01 02:42:58,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:58,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:42:58,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:42:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:42:58,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-09-01 02:42:58,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 38 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:58,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:58,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-09-01 02:42:58,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:58,659 INFO L130 PetriNetUnfolder]: 1988/3574 cut-off events. [2023-09-01 02:42:58,659 INFO L131 PetriNetUnfolder]: For 1334/1458 co-relation queries the response was YES. [2023-09-01 02:42:58,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 3574 events. 1988/3574 cut-off events. For 1334/1458 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23903 event pairs, 1029 based on Foata normal form. 124/3482 useless extension candidates. Maximal degree in co-relation 8875. Up to 2274 conditions per place. [2023-09-01 02:42:58,679 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 41 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2023-09-01 02:42:58,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 367 flow [2023-09-01 02:42:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:42:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:42:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-09-01 02:42:58,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745019920318723 [2023-09-01 02:42:58,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-09-01 02:42:58,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-09-01 02:42:58,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:58,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-09-01 02:42:58,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:58,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:42:58,686 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:42:58,686 INFO L175 Difference]: Start difference. First operand has 61 places, 38 transitions, 229 flow. Second operand 5 states and 549 transitions. [2023-09-01 02:42:58,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 367 flow [2023-09-01 02:42:58,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 51 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 02:42:58,689 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 243 flow [2023-09-01 02:42:58,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-09-01 02:42:58,689 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-09-01 02:42:58,690 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 243 flow [2023-09-01 02:42:58,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:58,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:58,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:42:58,704 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 02:42:58,899 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 02:42:58,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:42:58,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -512666904, now seen corresponding path program 1 times [2023-09-01 02:42:58,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:58,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383600927] [2023-09-01 02:42:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:58,901 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 02:42:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:58,902 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 02:42:58,905 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 02:42:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:42:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:59,028 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:42:59,028 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 14 treesize of output 29 [2023-09-01 02:42:59,129 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 02:42:59,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:42:59,451 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 02:42:59,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:59,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383600927] [2023-09-01 02:42:59,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383600927] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:42:59,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:42:59,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:42:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265544019] [2023-09-01 02:42:59,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:42:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:42:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:42:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:43:01,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-09-01 02:43:01,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 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 02:43:01,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:43:01,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-09-01 02:43:01,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:43:03,077 INFO L130 PetriNetUnfolder]: 4049/7201 cut-off events. [2023-09-01 02:43:03,078 INFO L131 PetriNetUnfolder]: For 3412/3762 co-relation queries the response was YES. [2023-09-01 02:43:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19559 conditions, 7201 events. 4049/7201 cut-off events. For 3412/3762 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 51438 event pairs, 437 based on Foata normal form. 854/8055 useless extension candidates. Maximal degree in co-relation 19528. Up to 1549 conditions per place. [2023-09-01 02:43:03,110 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 95 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2023-09-01 02:43:03,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 713 flow [2023-09-01 02:43:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 02:43:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 02:43:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1095 transitions. [2023-09-01 02:43:03,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362549800796813 [2023-09-01 02:43:03,114 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1095 transitions. [2023-09-01 02:43:03,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1095 transitions. [2023-09-01 02:43:03,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:43:03,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1095 transitions. [2023-09-01 02:43:03,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 109.5) internal successors, (1095), 10 states have internal predecessors, (1095), 0 states have call successors, (0), 0 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 02:43:03,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 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 02:43:03,119 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 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 02:43:03,119 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 243 flow. Second operand 10 states and 1095 transitions. [2023-09-01 02:43:03,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 713 flow [2023-09-01 02:43:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 114 transitions, 693 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 02:43:03,124 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 346 flow [2023-09-01 02:43:03,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2023-09-01 02:43:03,125 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-09-01 02:43:03,125 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 346 flow [2023-09-01 02:43:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 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 02:43:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:43:03,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:43:03,151 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 02:43:03,333 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 02:43:03,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:43:03,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:43:03,333 INFO L85 PathProgramCache]: Analyzing trace with hash 787792779, now seen corresponding path program 1 times [2023-09-01 02:43:03,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:43:03,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892797356] [2023-09-01 02:43:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:43:03,334 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 02:43:03,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:43:03,335 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 02:43:03,336 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 02:43:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:43:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:43:03,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:43:03,487 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:43:03,487 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 14 treesize of output 29 [2023-09-01 02:43:03,634 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 02:43:03,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:43:03,987 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 02:43:03,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:43:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892797356] [2023-09-01 02:43:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892797356] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:43:03,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:43:03,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:43:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755636198] [2023-09-01 02:43:03,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:43:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:43:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:43:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:43:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:43:05,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-09-01 02:43:05,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 02:43:05,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:43:05,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-09-01 02:43:05,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:43:08,386 INFO L130 PetriNetUnfolder]: 8954/15778 cut-off events. [2023-09-01 02:43:08,386 INFO L131 PetriNetUnfolder]: For 39795/40806 co-relation queries the response was YES. [2023-09-01 02:43:08,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57777 conditions, 15778 events. 8954/15778 cut-off events. For 39795/40806 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 122089 event pairs, 1218 based on Foata normal form. 2235/17995 useless extension candidates. Maximal degree in co-relation 57739. Up to 3997 conditions per place. [2023-09-01 02:43:08,477 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 132 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2023-09-01 02:43:08,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 159 transitions, 1394 flow [2023-09-01 02:43:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 02:43:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 02:43:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1087 transitions. [2023-09-01 02:43:08,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43306772908366536 [2023-09-01 02:43:08,482 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1087 transitions. [2023-09-01 02:43:08,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1087 transitions. [2023-09-01 02:43:08,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:43:08,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1087 transitions. [2023-09-01 02:43:08,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 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 02:43:08,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 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 02:43:08,488 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 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 02:43:08,488 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 346 flow. Second operand 10 states and 1087 transitions. [2023-09-01 02:43:08,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 159 transitions, 1394 flow [2023-09-01 02:43:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 159 transitions, 1302 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-09-01 02:43:08,517 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 561 flow [2023-09-01 02:43:08,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=561, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2023-09-01 02:43:08,518 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2023-09-01 02:43:08,518 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 561 flow [2023-09-01 02:43:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 02:43:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:43:08,519 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:43:08,531 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 02:43:08,726 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 02:43:08,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:43:08,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:43:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1270287195, now seen corresponding path program 3 times [2023-09-01 02:43:08,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:43:08,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360835973] [2023-09-01 02:43:08,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:43:08,728 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 02:43:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:43:08,734 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 02:43:08,735 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 02:43:08,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:43:08,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:43:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:43:08,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:43:08,931 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:43:08,932 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 14 treesize of output 29 [2023-09-01 02:43:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:43:09,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:43:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:43:11,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:43:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360835973] [2023-09-01 02:43:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360835973] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:43:11,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:43:11,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:43:11,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415165572] [2023-09-01 02:43:11,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:43:11,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:43:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:43:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:43:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:43:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-09-01 02:43:19,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 561 flow. Second operand has 24 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 02:43:19,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:43:19,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-09-01 02:43:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:43:37,907 INFO L130 PetriNetUnfolder]: 19982/35274 cut-off events. [2023-09-01 02:43:37,907 INFO L131 PetriNetUnfolder]: For 174740/179239 co-relation queries the response was YES. [2023-09-01 02:43:38,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165475 conditions, 35274 events. 19982/35274 cut-off events. For 174740/179239 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 291642 event pairs, 14604 based on Foata normal form. 4301/39575 useless extension candidates. Maximal degree in co-relation 165430. Up to 8821 conditions per place. [2023-09-01 02:43:38,265 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 916 selfloop transitions, 24 changer transitions 0/943 dead transitions. [2023-09-01 02:43:38,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 943 transitions, 9868 flow [2023-09-01 02:43:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:43:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:43:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2902 transitions. [2023-09-01 02:43:38,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817397078353254 [2023-09-01 02:43:38,271 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2902 transitions. [2023-09-01 02:43:38,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2902 transitions. [2023-09-01 02:43:38,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:43:38,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2902 transitions. [2023-09-01 02:43:38,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 120.91666666666667) internal successors, (2902), 24 states have internal predecessors, (2902), 0 states have call successors, (0), 0 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 02:43:38,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 251.0) internal successors, (6275), 25 states have internal predecessors, (6275), 0 states have call successors, (0), 0 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 02:43:38,292 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 251.0) internal successors, (6275), 25 states have internal predecessors, (6275), 0 states have call successors, (0), 0 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 02:43:38,293 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 561 flow. Second operand 24 states and 2902 transitions. [2023-09-01 02:43:38,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 943 transitions, 9868 flow [2023-09-01 02:43:38,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 943 transitions, 9569 flow, removed 126 selfloop flow, removed 3 redundant places. [2023-09-01 02:43:38,490 INFO L231 Difference]: Finished difference. Result has 123 places, 76 transitions, 730 flow [2023-09-01 02:43:38,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=730, PETRI_PLACES=123, PETRI_TRANSITIONS=76} [2023-09-01 02:43:38,491 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-09-01 02:43:38,491 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 76 transitions, 730 flow [2023-09-01 02:43:38,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 02:43:38,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:43:38,492 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 02:43:38,503 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 02:43:38,701 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 02:43:38,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:43:38,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:43:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -611657009, now seen corresponding path program 2 times [2023-09-01 02:43:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:43:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192243817] [2023-09-01 02:43:38,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:43:38,702 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 02:43:38,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:43:38,723 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 02:43:38,724 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 02:43:38,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:43:38,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:43:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:43:38,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:43:38,872 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:43:38,873 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 14 treesize of output 29 [2023-09-01 02:43:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:43:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:43:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:43:40,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:43:40,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192243817] [2023-09-01 02:43:40,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192243817] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:43:40,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:43:40,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-09-01 02:43:40,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755762932] [2023-09-01 02:43:40,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:43:40,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:43:40,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:43:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:43:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:43:45,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-09-01 02:43:45,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 76 transitions, 730 flow. Second operand has 18 states, 18 states have (on average 100.55555555555556) internal successors, (1810), 18 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 02:43:45,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:43:45,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-09-01 02:43:45,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:43:57,071 INFO L130 PetriNetUnfolder]: 20858/37062 cut-off events. [2023-09-01 02:43:57,072 INFO L131 PetriNetUnfolder]: For 169312/171494 co-relation queries the response was YES. [2023-09-01 02:43:57,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169247 conditions, 37062 events. 20858/37062 cut-off events. For 169312/171494 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 309551 event pairs, 9558 based on Foata normal form. 2285/39347 useless extension candidates. Maximal degree in co-relation 169189. Up to 23890 conditions per place. [2023-09-01 02:43:57,379 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 336 selfloop transitions, 55 changer transitions 0/392 dead transitions. [2023-09-01 02:43:57,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 392 transitions, 3744 flow [2023-09-01 02:43:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:43:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:43:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2491 transitions. [2023-09-01 02:43:57,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314914256019401 [2023-09-01 02:43:57,406 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2491 transitions. [2023-09-01 02:43:57,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2491 transitions. [2023-09-01 02:43:57,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:43:57,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2491 transitions. [2023-09-01 02:43:57,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 108.30434782608695) internal successors, (2491), 23 states have internal predecessors, (2491), 0 states have call successors, (0), 0 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 02:43:57,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 251.0) internal successors, (6024), 24 states have internal predecessors, (6024), 0 states have call successors, (0), 0 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 02:43:57,433 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 251.0) internal successors, (6024), 24 states have internal predecessors, (6024), 0 states have call successors, (0), 0 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 02:43:57,433 INFO L175 Difference]: Start difference. First operand has 123 places, 76 transitions, 730 flow. Second operand 23 states and 2491 transitions. [2023-09-01 02:43:57,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 392 transitions, 3744 flow [2023-09-01 02:43:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 392 transitions, 3696 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 02:43:57,680 INFO L231 Difference]: Finished difference. Result has 137 places, 113 transitions, 1211 flow [2023-09-01 02:43:57,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1211, PETRI_PLACES=137, PETRI_TRANSITIONS=113} [2023-09-01 02:43:57,681 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 99 predicate places. [2023-09-01 02:43:57,681 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 113 transitions, 1211 flow [2023-09-01 02:43:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.55555555555556) internal successors, (1810), 18 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 02:43:57,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:43:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:43:57,692 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 02:43:57,889 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 02:43:57,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:43:57,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:43:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash -122731005, now seen corresponding path program 1 times [2023-09-01 02:43:57,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:43:57,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444331208] [2023-09-01 02:43:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:43:57,890 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 02:43:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:43:57,891 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 02:43:57,893 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 02:43:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:43:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:43:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:43:57,978 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 02:43:57,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:43:57,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:43:57,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444331208] [2023-09-01 02:43:57,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444331208] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:43:57,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:43:57,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:43:57,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003751058] [2023-09-01 02:43:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:43:57,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:43:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:43:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:43:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:43:57,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-09-01 02:43:57,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 113 transitions, 1211 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 02:43:57,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:43:57,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-09-01 02:43:57,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:44:03,361 INFO L130 PetriNetUnfolder]: 20096/35738 cut-off events. [2023-09-01 02:44:03,370 INFO L131 PetriNetUnfolder]: For 183706/188390 co-relation queries the response was YES. [2023-09-01 02:44:03,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172367 conditions, 35738 events. 20096/35738 cut-off events. For 183706/188390 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 300069 event pairs, 7209 based on Foata normal form. 4100/39756 useless extension candidates. Maximal degree in co-relation 172306. Up to 33858 conditions per place. [2023-09-01 02:44:03,643 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 121 selfloop transitions, 5 changer transitions 3/133 dead transitions. [2023-09-01 02:44:03,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 133 transitions, 1645 flow [2023-09-01 02:44:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:44:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:44:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-09-01 02:44:03,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860557768924303 [2023-09-01 02:44:03,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-09-01 02:44:03,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-09-01 02:44:03,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:44:03,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-09-01 02:44:03,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 02:44:03,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:44:03,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 02:44:03,667 INFO L175 Difference]: Start difference. First operand has 137 places, 113 transitions, 1211 flow. Second operand 3 states and 366 transitions. [2023-09-01 02:44:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 133 transitions, 1645 flow [2023-09-01 02:44:04,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 133 transitions, 1575 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-09-01 02:44:04,161 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 1182 flow [2023-09-01 02:44:04,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2023-09-01 02:44:04,162 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 93 predicate places. [2023-09-01 02:44:04,162 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 1182 flow [2023-09-01 02:44:04,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 02:44:04,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:44:04,162 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:44:04,169 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 02:44:04,366 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 02:44:04,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:44:04,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:44:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash -268115831, now seen corresponding path program 2 times [2023-09-01 02:44:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:44:04,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258046535] [2023-09-01 02:44:04,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:44:04,370 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 02:44:04,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:44:04,370 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 02:44:04,375 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 02:44:04,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:44:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:44:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:44:04,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:44:04,535 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:44:04,535 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 14 treesize of output 29 [2023-09-01 02:44:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:44:04,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:44:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:44:05,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:44:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258046535] [2023-09-01 02:44:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258046535] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:44:05,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:44:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-09-01 02:44:05,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738458980] [2023-09-01 02:44:05,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:44:05,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:44:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:44:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:44:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:44:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-09-01 02:44:11,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 1182 flow. Second operand has 18 states, 18 states have (on average 100.77777777777777) internal successors, (1814), 18 states have internal predecessors, (1814), 0 states have call successors, (0), 0 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 02:44:11,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:44:11,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-09-01 02:44:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:44:22,880 INFO L130 PetriNetUnfolder]: 19663/34993 cut-off events. [2023-09-01 02:44:22,881 INFO L131 PetriNetUnfolder]: For 185357/187761 co-relation queries the response was YES. [2023-09-01 02:44:23,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169719 conditions, 34993 events. 19663/34993 cut-off events. For 185357/187761 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 292214 event pairs, 9686 based on Foata normal form. 1882/36875 useless extension candidates. Maximal degree in co-relation 169660. Up to 22720 conditions per place. [2023-09-01 02:44:23,364 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 346 selfloop transitions, 53 changer transitions 0/402 dead transitions. [2023-09-01 02:44:23,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 402 transitions, 4492 flow [2023-09-01 02:44:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 02:44:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 02:44:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2259 transitions. [2023-09-01 02:44:23,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-09-01 02:44:23,370 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2259 transitions. [2023-09-01 02:44:23,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2259 transitions. [2023-09-01 02:44:23,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:44:23,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2259 transitions. [2023-09-01 02:44:23,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.57142857142857) internal successors, (2259), 21 states have internal predecessors, (2259), 0 states have call successors, (0), 0 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 02:44:23,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 251.0) internal successors, (5522), 22 states have internal predecessors, (5522), 0 states have call successors, (0), 0 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 02:44:23,381 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 251.0) internal successors, (5522), 22 states have internal predecessors, (5522), 0 states have call successors, (0), 0 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 02:44:23,381 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 1182 flow. Second operand 21 states and 2259 transitions. [2023-09-01 02:44:23,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 402 transitions, 4492 flow [2023-09-01 02:44:23,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 402 transitions, 4376 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-09-01 02:44:23,928 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1525 flow [2023-09-01 02:44:23,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1525, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2023-09-01 02:44:23,929 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2023-09-01 02:44:23,929 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1525 flow [2023-09-01 02:44:23,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.77777777777777) internal successors, (1814), 18 states have internal predecessors, (1814), 0 states have call successors, (0), 0 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 02:44:23,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:44:23,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:44:23,938 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 02:44:24,138 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 02:44:24,138 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:44:24,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:44:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1302554009, now seen corresponding path program 1 times [2023-09-01 02:44:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:44:24,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643578957] [2023-09-01 02:44:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:44:24,139 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 02:44:24,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:44:24,140 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 02:44:24,142 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 02:44:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:44:24,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:44:24,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:44:24,307 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 02:44:24,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:44:24,408 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 02:44:24,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:44:24,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643578957] [2023-09-01 02:44:24,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643578957] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:44:24,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:44:24,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 02:44:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337658915] [2023-09-01 02:44:24,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:44:24,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 02:44:24,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:44:24,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 02:44:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-09-01 02:44:24,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-09-01 02:44:24,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1525 flow. Second operand has 13 states, 13 states have (on average 106.46153846153847) internal successors, (1384), 13 states have internal predecessors, (1384), 0 states have call successors, (0), 0 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 02:44:24,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:44:24,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-09-01 02:44:24,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:44:29,901 INFO L130 PetriNetUnfolder]: 20330/35994 cut-off events. [2023-09-01 02:44:29,901 INFO L131 PetriNetUnfolder]: For 179565/179565 co-relation queries the response was YES. [2023-09-01 02:44:30,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179048 conditions, 35994 events. 20330/35994 cut-off events. For 179565/179565 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 295186 event pairs, 754 based on Foata normal form. 670/36664 useless extension candidates. Maximal degree in co-relation 178988. Up to 10994 conditions per place. [2023-09-01 02:44:30,213 INFO L137 encePairwiseOnDemand]: 241/251 looper letters, 174 selfloop transitions, 192 changer transitions 0/366 dead transitions. [2023-09-01 02:44:30,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 366 transitions, 4346 flow [2023-09-01 02:44:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:44:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:44:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1673 transitions. [2023-09-01 02:44:30,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44435590969455513 [2023-09-01 02:44:30,216 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1673 transitions. [2023-09-01 02:44:30,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1673 transitions. [2023-09-01 02:44:30,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:44:30,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1673 transitions. [2023-09-01 02:44:30,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.53333333333333) internal successors, (1673), 15 states have internal predecessors, (1673), 0 states have call successors, (0), 0 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 02:44:30,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 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 02:44:30,221 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 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 02:44:30,221 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1525 flow. Second operand 15 states and 1673 transitions. [2023-09-01 02:44:30,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 366 transitions, 4346 flow [2023-09-01 02:44:30,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 366 transitions, 4272 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-09-01 02:44:31,002 INFO L231 Difference]: Finished difference. Result has 166 places, 280 transitions, 3706 flow [2023-09-01 02:44:31,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3706, PETRI_PLACES=166, PETRI_TRANSITIONS=280} [2023-09-01 02:44:31,003 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-09-01 02:44:31,003 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 280 transitions, 3706 flow [2023-09-01 02:44:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.46153846153847) internal successors, (1384), 13 states have internal predecessors, (1384), 0 states have call successors, (0), 0 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 02:44:31,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:44:31,003 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-09-01 02:44:31,010 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 02:44:31,210 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 02:44:31,210 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:44:31,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:44:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1085014400, now seen corresponding path program 3 times [2023-09-01 02:44:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:44:31,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110550116] [2023-09-01 02:44:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:44:31,211 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 02:44:31,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:44:31,212 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 02:44:31,214 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 02:44:31,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 02:44:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:44:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:44:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:44:31,539 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:44:31,539 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 14 treesize of output 29 [2023-09-01 02:44:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 02:44:31,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:44:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 02:44:32,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:44:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110550116] [2023-09-01 02:44:32,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110550116] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:44:32,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:44:32,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 02:44:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150240989] [2023-09-01 02:44:32,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:44:32,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:44:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:44:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:44:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:44:38,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-09-01 02:44:38,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 280 transitions, 3706 flow. Second operand has 18 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 02:44:38,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:44:38,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-09-01 02:44:38,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:44:59,428 INFO L130 PetriNetUnfolder]: 45839/84757 cut-off events. [2023-09-01 02:44:59,429 INFO L131 PetriNetUnfolder]: For 755181/764048 co-relation queries the response was YES. [2023-09-01 02:45:00,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492074 conditions, 84757 events. 45839/84757 cut-off events. For 755181/764048 co-relation queries the response was YES. Maximal size of possible extension queue 1718. Compared 804090 event pairs, 5807 based on Foata normal form. 9297/93939 useless extension candidates. Maximal degree in co-relation 492004. Up to 19635 conditions per place. [2023-09-01 02:45:01,116 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 640 selfloop transitions, 57 changer transitions 0/714 dead transitions. [2023-09-01 02:45:01,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 714 transitions, 10434 flow [2023-09-01 02:45:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:45:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:45:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1669 transitions. [2023-09-01 02:45:01,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44329349269588314 [2023-09-01 02:45:01,120 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1669 transitions. [2023-09-01 02:45:01,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1669 transitions. [2023-09-01 02:45:01,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:45:01,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1669 transitions. [2023-09-01 02:45:01,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.26666666666667) internal successors, (1669), 15 states have internal predecessors, (1669), 0 states have call successors, (0), 0 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 02:45:01,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 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 02:45:01,124 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 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 02:45:01,124 INFO L175 Difference]: Start difference. First operand has 166 places, 280 transitions, 3706 flow. Second operand 15 states and 1669 transitions. [2023-09-01 02:45:01,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 714 transitions, 10434 flow [2023-09-01 02:45:08,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 714 transitions, 10064 flow, removed 161 selfloop flow, removed 3 redundant places. [2023-09-01 02:45:08,066 INFO L231 Difference]: Finished difference. Result has 185 places, 301 transitions, 3800 flow [2023-09-01 02:45:08,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3800, PETRI_PLACES=185, PETRI_TRANSITIONS=301} [2023-09-01 02:45:08,066 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 147 predicate places. [2023-09-01 02:45:08,067 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 301 transitions, 3800 flow [2023-09-01 02:45:08,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 02:45:08,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:45:08,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:45:08,076 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 02:45:08,276 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 02:45:08,276 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:45:08,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:45:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash -988753028, now seen corresponding path program 1 times [2023-09-01 02:45:08,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:45:08,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877417990] [2023-09-01 02:45:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:45:08,277 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 02:45:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:45:08,278 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 02:45:08,280 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 02:45:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:45:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:45:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:45:08,442 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 02:45:08,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:45:08,534 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 02:45:08,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:45:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877417990] [2023-09-01 02:45:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877417990] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:45:08,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:45:08,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 02:45:08,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634828967] [2023-09-01 02:45:08,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:45:08,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 02:45:08,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:45:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 02:45:08,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-09-01 02:45:08,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-09-01 02:45:08,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 301 transitions, 3800 flow. Second operand has 13 states, 13 states have (on average 106.3076923076923) internal successors, (1382), 13 states have internal predecessors, (1382), 0 states have call successors, (0), 0 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 02:45:08,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:45:08,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-09-01 02:45:08,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:45:25,498 INFO L130 PetriNetUnfolder]: 46898/86196 cut-off events. [2023-09-01 02:45:25,498 INFO L131 PetriNetUnfolder]: For 658358/658358 co-relation queries the response was YES. [2023-09-01 02:45:27,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519133 conditions, 86196 events. 46898/86196 cut-off events. For 658358/658358 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 807639 event pairs, 3421 based on Foata normal form. 510/86706 useless extension candidates. Maximal degree in co-relation 519054. Up to 35469 conditions per place. [2023-09-01 02:45:27,334 INFO L137 encePairwiseOnDemand]: 241/251 looper letters, 280 selfloop transitions, 373 changer transitions 0/653 dead transitions. [2023-09-01 02:45:27,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 653 transitions, 9615 flow [2023-09-01 02:45:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:45:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:45:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1662 transitions. [2023-09-01 02:45:27,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44143426294820715 [2023-09-01 02:45:27,347 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1662 transitions. [2023-09-01 02:45:27,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1662 transitions. [2023-09-01 02:45:27,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:45:27,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1662 transitions. [2023-09-01 02:45:27,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.8) internal successors, (1662), 15 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 02:45:27,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 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 02:45:27,363 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 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 02:45:27,363 INFO L175 Difference]: Start difference. First operand has 185 places, 301 transitions, 3800 flow. Second operand 15 states and 1662 transitions. [2023-09-01 02:45:27,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 653 transitions, 9615 flow [2023-09-01 02:45:33,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 653 transitions, 9404 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-09-01 02:45:33,094 INFO L231 Difference]: Finished difference. Result has 205 places, 533 transitions, 8320 flow [2023-09-01 02:45:33,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8320, PETRI_PLACES=205, PETRI_TRANSITIONS=533} [2023-09-01 02:45:33,095 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-09-01 02:45:33,095 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 533 transitions, 8320 flow [2023-09-01 02:45:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.3076923076923) internal successors, (1382), 13 states have internal predecessors, (1382), 0 states have call successors, (0), 0 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 02:45:33,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:45:33,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:45:33,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-09-01 02:45:33,305 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 02:45:33,305 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:45:33,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:45:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash 784803776, now seen corresponding path program 2 times [2023-09-01 02:45:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:45:33,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503279978] [2023-09-01 02:45:33,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:45:33,307 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 02:45:33,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:45:33,308 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 02:45:33,311 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 02:45:33,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:45:33,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:45:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:45:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:45:33,458 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:45:33,459 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 14 treesize of output 29 [2023-09-01 02:45:33,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 02:45:33,510 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 02:45:33,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:45:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:45:33,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:45:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503279978] [2023-09-01 02:45:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503279978] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 02:45:33,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 02:45:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-09-01 02:45:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439884231] [2023-09-01 02:45:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:45:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:45:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:45:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:45:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:45:33,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-09-01 02:45:33,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 533 transitions, 8320 flow. Second operand has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 02:45:33,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:45:33,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-09-01 02:45:33,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:45:54,376 INFO L130 PetriNetUnfolder]: 44509/81779 cut-off events. [2023-09-01 02:45:54,376 INFO L131 PetriNetUnfolder]: For 909618/915039 co-relation queries the response was YES. [2023-09-01 02:45:56,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559108 conditions, 81779 events. 44509/81779 cut-off events. For 909618/915039 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 766443 event pairs, 18530 based on Foata normal form. 2691/84350 useless extension candidates. Maximal degree in co-relation 559018. Up to 58306 conditions per place. [2023-09-01 02:45:56,578 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 296 selfloop transitions, 249 changer transitions 0/566 dead transitions. [2023-09-01 02:45:56,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 566 transitions, 9873 flow [2023-09-01 02:45:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:45:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:45:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-09-01 02:45:56,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231075697211155 [2023-09-01 02:45:56,581 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-09-01 02:45:56,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-09-01 02:45:56,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:45:56,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-09-01 02:45:56,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:45:56,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:45:56,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:45:56,584 INFO L175 Difference]: Start difference. First operand has 205 places, 533 transitions, 8320 flow. Second operand 5 states and 531 transitions. [2023-09-01 02:45:56,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 566 transitions, 9873 flow [2023-09-01 02:46:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 566 transitions, 9272 flow, removed 238 selfloop flow, removed 4 redundant places. [2023-09-01 02:46:22,521 INFO L231 Difference]: Finished difference. Result has 206 places, 533 transitions, 8474 flow [2023-09-01 02:46:22,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8474, PETRI_PLACES=206, PETRI_TRANSITIONS=533} [2023-09-01 02:46:22,522 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 168 predicate places. [2023-09-01 02:46:22,522 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 533 transitions, 8474 flow [2023-09-01 02:46:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 02:46:22,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:22,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:46:22,531 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 02:46:22,729 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 02:46:22,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:46:22,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 528147135, now seen corresponding path program 2 times [2023-09-01 02:46:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:22,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7431157] [2023-09-01 02:46:22,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:46:22,730 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 02:46:22,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:22,731 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 02:46:22,733 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 02:46:22,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:46:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:46:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:46:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:22,872 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:46:22,872 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 14 treesize of output 29 [2023-09-01 02:46:22,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 02:46:22,922 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 02:46:22,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:46:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:46:22,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:22,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7431157] [2023-09-01 02:46:22,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7431157] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 02:46:22,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 02:46:22,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-09-01 02:46:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196257223] [2023-09-01 02:46:22,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:22,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:46:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:46:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:46:23,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-09-01 02:46:23,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 533 transitions, 8474 flow. Second operand has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 02:46:23,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:23,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-09-01 02:46:23,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:42,933 INFO L130 PetriNetUnfolder]: 44719/80641 cut-off events. [2023-09-01 02:46:42,934 INFO L131 PetriNetUnfolder]: For 1024221/1024987 co-relation queries the response was YES. [2023-09-01 02:46:44,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545759 conditions, 80641 events. 44719/80641 cut-off events. For 1024221/1024987 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 737089 event pairs, 13326 based on Foata normal form. 440/81062 useless extension candidates. Maximal degree in co-relation 545668. Up to 43550 conditions per place. [2023-09-01 02:46:44,742 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 415 selfloop transitions, 160 changer transitions 0/595 dead transitions. [2023-09-01 02:46:44,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 595 transitions, 10802 flow [2023-09-01 02:46:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:46:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:46:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-09-01 02:46:44,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231075697211155 [2023-09-01 02:46:44,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-09-01 02:46:44,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-09-01 02:46:44,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:44,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-09-01 02:46:44,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:46:44,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:46:44,747 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:46:44,747 INFO L175 Difference]: Start difference. First operand has 206 places, 533 transitions, 8474 flow. Second operand 5 states and 531 transitions. [2023-09-01 02:46:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 595 transitions, 10802 flow [2023-09-01 02:47:04,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 595 transitions, 10181 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-09-01 02:47:04,015 INFO L231 Difference]: Finished difference. Result has 203 places, 533 transitions, 8409 flow [2023-09-01 02:47:04,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7929, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8409, PETRI_PLACES=203, PETRI_TRANSITIONS=533} [2023-09-01 02:47:04,016 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 165 predicate places. [2023-09-01 02:47:04,016 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 533 transitions, 8409 flow [2023-09-01 02:47:04,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 02:47:04,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:04,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:47:04,023 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 02:47:04,223 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 02:47:04,223 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:47:04,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash 299064887, now seen corresponding path program 1 times [2023-09-01 02:47:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292497591] [2023-09-01 02:47:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:04,224 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 02:47:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:04,225 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 02:47:04,227 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 02:47:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 02:47:04,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:04,373 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 26 treesize of output 24 [2023-09-01 02:47:04,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 02:47:04,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 28 [2023-09-01 02:47:04,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 46 [2023-09-01 02:47:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:47:04,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:47:05,026 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvneg .cse0)) (_ bv0 32)) (not (bvsle |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvadd .cse0 (_ bv2147483647 32))))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvneg .cse5)) (_ bv0 32)) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2023-09-01 02:47:05,069 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse8 (select |c_#memory_int| c_~A~0.base)) (.cse9 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork1_~i~0#1|))) (concat (concat (concat (select .cse8 (bvadd .cse9 (_ bv3 32) c_~A~0.offset)) (select .cse8 (bvadd .cse9 (_ bv2 32) c_~A~0.offset))) (select .cse8 (bvadd .cse9 c_~A~0.offset (_ bv1 32)))) (select .cse8 (bvadd .cse9 c_~A~0.offset))))) (.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 .cse0 (bvneg .cse1)) (_ bv0 32)) (not (bvsge .cse1 (_ bv0 32)))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 .cse0 (bvneg .cse6)) (_ bv0 32)) (not (bvsle (bvadd c_~counter~0 .cse0) (bvadd .cse6 (_ bv2147483647 32))))))))) is different from false [2023-09-01 02:47:05,104 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (let ((.cse1 (let ((.cse8 (select |c_#memory_int| c_~A~0.base))) (concat (concat (concat (select .cse8 .cse3) (select .cse8 .cse4)) (select .cse8 .cse5)) (select .cse8 c_~A~0.offset))))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (not (bvsge .cse0 (_ bv0 32))) (= (bvadd c_~counter~0 .cse1 (bvneg .cse0)) (_ bv0 32))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (not (bvsle (bvadd c_~counter~0 .cse1) (bvadd .cse6 (_ bv2147483647 32)))) (= (bvadd c_~counter~0 .cse1 (bvneg .cse6)) (_ bv0 32)))))))) is different from false [2023-09-01 02:47:05,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:05,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 996 treesize of output 732 [2023-09-01 02:47:05,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:05,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 300 [2023-09-01 02:47:05,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:05,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 163 [2023-09-01 02:47:05,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:05,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 628 treesize of output 474 [2023-09-01 02:47:05,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:05,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 232 [2023-09-01 02:47:05,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:47:05,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 123 [2023-09-01 02:47:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 02:47:06,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:06,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292497591] [2023-09-01 02:47:06,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292497591] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:47:06,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:47:06,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-09-01 02:47:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859460303] [2023-09-01 02:47:06,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:47:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:47:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:47:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=223, Unknown=3, NotChecked=96, Total=380 [2023-09-01 02:47:06,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 251 [2023-09-01 02:47:06,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 533 transitions, 8409 flow. Second operand has 20 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 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 02:47:06,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:06,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 251 [2023-09-01 02:47:06,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:36,387 INFO L130 PetriNetUnfolder]: 62976/112593 cut-off events. [2023-09-01 02:47:36,388 INFO L131 PetriNetUnfolder]: For 1294484/1294484 co-relation queries the response was YES. [2023-09-01 02:47:38,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786344 conditions, 112593 events. 62976/112593 cut-off events. For 1294484/1294484 co-relation queries the response was YES. Maximal size of possible extension queue 2180. Compared 1063178 event pairs, 12744 based on Foata normal form. 172/112765 useless extension candidates. Maximal degree in co-relation 786257. Up to 82905 conditions per place. [2023-09-01 02:47:38,866 INFO L137 encePairwiseOnDemand]: 240/251 looper letters, 738 selfloop transitions, 275 changer transitions 9/1022 dead transitions. [2023-09-01 02:47:38,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1022 transitions, 17737 flow [2023-09-01 02:47:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 02:47:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 02:47:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1635 transitions. [2023-09-01 02:47:38,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3256972111553785 [2023-09-01 02:47:38,876 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1635 transitions. [2023-09-01 02:47:38,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1635 transitions. [2023-09-01 02:47:38,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:38,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1635 transitions. [2023-09-01 02:47:38,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 81.75) internal successors, (1635), 20 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 02:47:38,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 251.0) internal successors, (5271), 21 states have internal predecessors, (5271), 0 states have call successors, (0), 0 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 02:47:38,884 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 251.0) internal successors, (5271), 21 states have internal predecessors, (5271), 0 states have call successors, (0), 0 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 02:47:38,884 INFO L175 Difference]: Start difference. First operand has 203 places, 533 transitions, 8409 flow. Second operand 20 states and 1635 transitions. [2023-09-01 02:47:38,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1022 transitions, 17737 flow [2023-09-01 02:48:44,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1022 transitions, 16665 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-09-01 02:48:44,892 INFO L231 Difference]: Finished difference. Result has 224 places, 744 transitions, 12295 flow [2023-09-01 02:48:44,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12295, PETRI_PLACES=224, PETRI_TRANSITIONS=744} [2023-09-01 02:48:44,893 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 186 predicate places. [2023-09-01 02:48:44,893 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 744 transitions, 12295 flow [2023-09-01 02:48:44,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 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 02:48:44,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:44,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:44,903 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 02:48:45,103 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 02:48:45,103 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:48:45,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash 581565303, now seen corresponding path program 2 times [2023-09-01 02:48:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:45,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111254749] [2023-09-01 02:48:45,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:48:45,104 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 02:48:45,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:45,105 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 02:48:45,107 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 02:48:45,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:48:45,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-09-01 02:48:45,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 02:48:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 02:48:45,439 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-09-01 02:48:45,441 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 02:48:45,442 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2023-09-01 02:48:45,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-09-01 02:48:45,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-09-01 02:48:45,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-09-01 02:48:45,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-09-01 02:48:45,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2023-09-01 02:48:45,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-09-01 02:48:45,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (6 of 22 remaining) [2023-09-01 02:48:45,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 22 remaining) [2023-09-01 02:48:45,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 22 remaining) [2023-09-01 02:48:45,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-09-01 02:48:45,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2023-09-01 02:48:45,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-09-01 02:48:45,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-09-01 02:48:45,463 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 02:48:45,654 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 02:48:45,655 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:45,659 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 02:48:45,659 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 02:48:45,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 02:48:45 BasicIcfg [2023-09-01 02:48:45,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 02:48:45,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 02:48:45,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 02:48:45,688 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 02:48:45,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:42:35" (3/4) ... [2023-09-01 02:48:45,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-09-01 02:48:45,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 02:48:45,691 INFO L158 Benchmark]: Toolchain (without parser) took 371092.63ms. Allocated memory was 67.1MB in the beginning and 15.4GB in the end (delta: 15.3GB). Free memory was 44.5MB in the beginning and 13.0GB in the end (delta: -12.9GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2023-09-01 02:48:45,691 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 54.5MB. Free memory is still 32.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:48:45,692 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.74ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 30.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-09-01 02:48:45,692 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.15ms. Allocated memory is still 67.1MB. Free memory was 30.6MB in the beginning and 46.4MB in the end (delta: -15.8MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2023-09-01 02:48:45,692 INFO L158 Benchmark]: Boogie Preprocessor took 57.83ms. Allocated memory is still 67.1MB. Free memory was 46.4MB in the beginning and 44.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 02:48:45,692 INFO L158 Benchmark]: RCFGBuilder took 566.53ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 44.6MB in the beginning and 59.4MB in the end (delta: -14.8MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2023-09-01 02:48:45,692 INFO L158 Benchmark]: TraceAbstraction took 370267.48ms. Allocated memory was 81.8MB in the beginning and 15.4GB in the end (delta: 15.3GB). Free memory was 58.6MB in the beginning and 13.0GB in the end (delta: -12.9GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2023-09-01 02:48:45,692 INFO L158 Benchmark]: Witness Printer took 2.61ms. Allocated memory is still 15.4GB. Free memory is still 13.0GB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:48:45,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 54.5MB. Free memory is still 32.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.74ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 30.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.15ms. Allocated memory is still 67.1MB. Free memory was 30.6MB in the beginning and 46.4MB in the end (delta: -15.8MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.83ms. Allocated memory is still 67.1MB. Free memory was 46.4MB in the beginning and 44.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 566.53ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 44.6MB in the beginning and 59.4MB in the end (delta: -14.8MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * TraceAbstraction took 370267.48ms. Allocated memory was 81.8MB in the beginning and 15.4GB in the end (delta: 15.3GB). Free memory was 58.6MB in the beginning and 13.0GB in the end (delta: -12.9GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. * Witness Printer took 2.61ms. Allocated memory is still 15.4GB. Free memory is still 13.0GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.9s, 119 PlacesBefore, 38 PlacesAfterwards, 121 TransitionsBefore, 34 TransitionsAfterwards, 936 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 124 TotalNumberOfCompositions, 1568 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1269, independent: 1232, independent conditional: 0, independent unconditional: 1232, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 468, independent: 458, independent conditional: 0, independent unconditional: 458, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1269, independent: 774, independent conditional: 0, independent unconditional: 774, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 468, unknown conditional: 0, unknown unconditional: 468] , Statistics on independence cache: Total cache size (in pairs): 76, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 87]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 87. Possible FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={5:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={5:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={5:0}, N=1, counter=0, pthread_create(&t1, 0, thread1, 0)=1, t1={13:0}, t2={12:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={5:0}, N=1, counter=0, pthread_create(&t2, 0, thread2, 0)=2, t1={13:0}, t2={12:0}] [L83] 0 \read(t1) VAL [A={5:0}, N=1, \read(t1)=1, counter=0, t1={13:0}, t2={12:0}] [L49] 1 int i=0; VAL [A={5:0}, N=1, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={5:0}, N=1, counter=0, i=0] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp [L62] 2 i++ VAL [A={5:0}, N=1, counter=-2, i=1, tmp=-2] [L54] 1 counter = tmp [L49] 1 i++ VAL [A={5:0}, N=1, counter=2, i=1, tmp=2] [L49] COND FALSE 1 !(i