./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.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-simple-array-sum.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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:54:59,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:54:59,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:54:59,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:54:59,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:54:59,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:54:59,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:54:59,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:54:59,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:54:59,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:54:59,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:54:59,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:54:59,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:54:59,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:54:59,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:54:59,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:54:59,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:54:59,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:54:59,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:54:59,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:54:59,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:54:59,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:54:59,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:54:59,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:54:59,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:54:59,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:54:59,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:54:59,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:54:59,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:54:59,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:54:59,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:54:59,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:54:59,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:54:59,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:54:59,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:54:59,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:54:59,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:54:59,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:54:59,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:54:59,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:54:59,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:54:59,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:54:59,984 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:54:59,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:54:59,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:54:59,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:54:59,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:54:59,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:54:59,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:54:59,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:54:59,987 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:54:59,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:54:59,987 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:54:59,987 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:54:59,988 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:54:59,989 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:54:59,989 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:54:59,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:54:59,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:54:59,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:54:59,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:54:59,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:54:59,990 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:54:59,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:55:00,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:55:00,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:55:00,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:55:00,256 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:55:00,256 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:55:00,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-09-01 03:55:01,276 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:55:01,411 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:55:01,412 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-09-01 03:55:01,416 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02ba1b6c/536f6517848346719027b6d0c9f2e47c/FLAGec109008c [2023-09-01 03:55:01,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02ba1b6c/536f6517848346719027b6d0c9f2e47c [2023-09-01 03:55:01,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:55:01,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:55:01,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:01,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:55:01,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:55:01,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:01" (1/1) ... [2023-09-01 03:55:01,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77567b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:01, skipping insertion in model container [2023-09-01 03:55:01,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:01" (1/1) ... [2023-09-01 03:55:01,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:55:01,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:55:01,553 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-simple-array-sum.wvr.c[2690,2703] [2023-09-01 03:55:01,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:01,570 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:55:01,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28cdf0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:01, skipping insertion in model container [2023-09-01 03:55:01,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:01,572 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:55:01,573 INFO L158 Benchmark]: Toolchain (without parser) took 145.74ms. Allocated memory is still 69.2MB. Free memory was 34.1MB in the beginning and 44.5MB in the end (delta: -10.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-09-01 03:55:01,574 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 69.2MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:55:01,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.37ms. Allocated memory is still 69.2MB. Free memory was 33.9MB in the beginning and 44.5MB in the end (delta: -10.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-09-01 03:55:01,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 69.2MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.37ms. Allocated memory is still 69.2MB. Free memory was 33.9MB in the beginning and 44.5MB in the end (delta: -10.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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-simple-array-sum.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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:55:02,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:55:02,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:55:02,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:55:02,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:55:02,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:55:02,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:55:02,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:55:02,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:55:02,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:55:02,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:55:02,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:55:02,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:55:02,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:55:02,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:55:02,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:55:02,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:55:02,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:55:02,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:55:02,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:55:02,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:55:02,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:55:02,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:55:02,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:55:02,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:55:02,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:55:02,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:55:02,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:55:02,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:55:02,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:55:02,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:55:02,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:55:02,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:55:02,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:55:02,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:55:02,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:55:02,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:55:02,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:55:02,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:55:02,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:55:02,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:55:02,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:55:03,004 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:55:03,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:55:03,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:55:03,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:55:03,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:55:03,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:55:03,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:55:03,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:55:03,007 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:55:03,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:55:03,008 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:55:03,008 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:55:03,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:55:03,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:55:03,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:55:03,009 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:55:03,010 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:55:03,010 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:55:03,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:55:03,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:55:03,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:55:03,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:55:03,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:55:03,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:55:03,011 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:55:03,011 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:55:03,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:55:03,011 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:55:03,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:55:03,012 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:55:03,012 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:55:03,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:55:03,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:55:03,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:55:03,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:55:03,224 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:55:03,225 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:55:03,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-09-01 03:55:03,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:55:04,669 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:55:04,670 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-09-01 03:55:04,676 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04aed322/444a099dd8b04d209ffad975f92f2538/FLAGe3239fa05 [2023-09-01 03:55:04,685 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04aed322/444a099dd8b04d209ffad975f92f2538 [2023-09-01 03:55:04,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:55:04,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:55:04,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:04,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:55:04,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:55:04,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ecd606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04, skipping insertion in model container [2023-09-01 03:55:04,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:55:04,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:55:04,826 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-simple-array-sum.wvr.c[2690,2703] [2023-09-01 03:55:04,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:04,839 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:55:04,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:55:04,850 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-simple-array-sum.wvr.c[2690,2703] [2023-09-01 03:55:04,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:04,858 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:55:04,872 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-simple-array-sum.wvr.c[2690,2703] [2023-09-01 03:55:04,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:04,900 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:55:04,904 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:55:04,908 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:55:04,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04 WrapperNode [2023-09-01 03:55:04,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:04,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:55:04,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:55:04,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:55:04,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,953 INFO L138 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 123 [2023-09-01 03:55:04,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:55:04,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:55:04,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:55:04,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:55:04,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,988 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:55:04,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:55:04,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:55:04,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:55:04,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (1/1) ... [2023-09-01 03:55:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:55:05,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:55:05,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:55:05,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:55:05,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:55:05,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:55:05,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:55:05,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:55:05,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:55:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:55:05,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:55:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:55:05,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:55:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:55:05,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:55:05,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:55:05,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:55:05,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:55:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:55:05,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:55:05,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:55:05,048 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:55:05,172 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:55:05,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:55:05,540 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:55:05,569 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:55:05,570 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 03:55:05,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:55:05 BoogieIcfgContainer [2023-09-01 03:55:05,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:55:05,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:55:05,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:55:05,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:55:05,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:55:04" (1/3) ... [2023-09-01 03:55:05,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a60a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:55:05, skipping insertion in model container [2023-09-01 03:55:05,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:04" (2/3) ... [2023-09-01 03:55:05,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a60a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:55:05, skipping insertion in model container [2023-09-01 03:55:05,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:55:05" (3/3) ... [2023-09-01 03:55:05,576 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-09-01 03:55:05,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:55:05,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 03:55:05,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:55:05,669 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:55:05,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 426 flow [2023-09-01 03:55:05,776 INFO L130 PetriNetUnfolder]: 16/198 cut-off events. [2023-09-01 03:55:05,776 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:55:05,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 16/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 148. Up to 3 conditions per place. [2023-09-01 03:55:05,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 426 flow [2023-09-01 03:55:05,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 194 transitions, 406 flow [2023-09-01 03:55:05,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:55:05,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 194 transitions, 406 flow [2023-09-01 03:55:05,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 194 transitions, 406 flow [2023-09-01 03:55:05,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 194 transitions, 406 flow [2023-09-01 03:55:05,845 INFO L130 PetriNetUnfolder]: 16/194 cut-off events. [2023-09-01 03:55:05,846 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:55:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 16/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 148. Up to 3 conditions per place. [2023-09-01 03:55:05,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 2868 [2023-09-01 03:55:21,034 INFO L134 LiptonReduction]: Checked pairs total: 4560 [2023-09-01 03:55:21,035 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-09-01 03:55:21,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:55:21,048 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;@54933afe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:55:21,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-09-01 03:55:21,050 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:55:21,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:55:21,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:21,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:55:21,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:21,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 24254, now seen corresponding path program 1 times [2023-09-01 03:55:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:21,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918120504] [2023-09-01 03:55:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:21,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:21,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:55:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:55:21,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:21,262 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:55:21,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:55:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:21,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:21,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918120504] [2023-09-01 03:55:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918120504] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:21,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:21,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:21,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65434050] [2023-09-01 03:55:21,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:21,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:21,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 400 [2023-09-01 03:55:21,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:21,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:21,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 400 [2023-09-01 03:55:21,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:22,145 INFO L130 PetriNetUnfolder]: 5485/6850 cut-off events. [2023-09-01 03:55:22,145 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-09-01 03:55:22,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13811 conditions, 6850 events. 5485/6850 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 29507 event pairs, 2611 based on Foata normal form. 0/1898 useless extension candidates. Maximal degree in co-relation 11877. Up to 6809 conditions per place. [2023-09-01 03:55:22,175 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 03:55:22,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 216 flow [2023-09-01 03:55:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-09-01 03:55:22,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-09-01 03:55:22,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-09-01 03:55:22,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-09-01 03:55:22,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:22,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-09-01 03:55:22,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 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 03:55:22,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:22,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:22,213 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 558 transitions. [2023-09-01 03:55:22,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 216 flow [2023-09-01 03:55:22,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:55:22,221 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 110 flow [2023-09-01 03:55:22,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-09-01 03:55:22,225 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2023-09-01 03:55:22,225 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 110 flow [2023-09-01 03:55:22,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:22,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:22,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:55:22,234 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 (2)] Ended with exit code 0 [2023-09-01 03:55:22,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:22,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:22,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 24255, now seen corresponding path program 1 times [2023-09-01 03:55:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:22,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45171605] [2023-09-01 03:55:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:22,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:22,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:55:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:55:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:22,606 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:55:22,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:55:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:22,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:22,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:22,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45171605] [2023-09-01 03:55:22,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45171605] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:22,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:22,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965678569] [2023-09-01 03:55:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:22,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:22,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 400 [2023-09-01 03:55:22,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:22,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:22,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 400 [2023-09-01 03:55:22,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:23,805 INFO L130 PetriNetUnfolder]: 10969/13697 cut-off events. [2023-09-01 03:55:23,806 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 03:55:23,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27408 conditions, 13697 events. 10969/13697 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 63988 event pairs, 5222 based on Foata normal form. 0/3705 useless extension candidates. Maximal degree in co-relation 27402. Up to 6810 conditions per place. [2023-09-01 03:55:23,863 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-09-01 03:55:23,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 96 transitions, 392 flow [2023-09-01 03:55:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-09-01 03:55:23,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2023-09-01 03:55:23,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-09-01 03:55:23,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-09-01 03:55:23,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:23,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-09-01 03:55:23,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:23,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:23,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:23,871 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 110 flow. Second operand 3 states and 602 transitions. [2023-09-01 03:55:23,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 96 transitions, 392 flow [2023-09-01 03:55:23,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:23,875 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 141 flow [2023-09-01 03:55:23,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-09-01 03:55:23,876 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-09-01 03:55:23,876 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 141 flow [2023-09-01 03:55:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:23,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:23,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:55:23,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:24,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:24,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 754150, now seen corresponding path program 1 times [2023-09-01 03:55:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:24,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341641691] [2023-09-01 03:55:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:24,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:24,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:24,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:24,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:55:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:55:24,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:24,241 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:55:24,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:55:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:24,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:55:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:24,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:24,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341641691] [2023-09-01 03:55:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341641691] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:55:24,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:55:24,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:55:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001771683] [2023-09-01 03:55:24,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:55:24,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:55:24,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:55:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:55:25,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 400 [2023-09-01 03:55:25,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:25,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:25,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 400 [2023-09-01 03:55:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:27,631 INFO L130 PetriNetUnfolder]: 16461/20556 cut-off events. [2023-09-01 03:55:27,631 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-09-01 03:55:27,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41157 conditions, 20556 events. 16461/20556 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 99971 event pairs, 7833 based on Foata normal form. 0/5631 useless extension candidates. Maximal degree in co-relation 41148. Up to 6811 conditions per place. [2023-09-01 03:55:27,719 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 131 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2023-09-01 03:55:27,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 153 transitions, 675 flow [2023-09-01 03:55:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:55:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:55:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1110 transitions. [2023-09-01 03:55:27,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-09-01 03:55:27,722 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1110 transitions. [2023-09-01 03:55:27,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1110 transitions. [2023-09-01 03:55:27,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:27,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1110 transitions. [2023-09-01 03:55:27,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:27,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:27,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:27,731 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 141 flow. Second operand 6 states and 1110 transitions. [2023-09-01 03:55:27,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 153 transitions, 675 flow [2023-09-01 03:55:27,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 153 transitions, 661 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:55:27,734 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 278 flow [2023-09-01 03:55:27,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-09-01 03:55:27,735 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-09-01 03:55:27,736 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 278 flow [2023-09-01 03:55:27,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:27,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:27,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:55:27,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:27,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:27,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:27,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash 754615, now seen corresponding path program 1 times [2023-09-01 03:55:27,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:27,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326814541] [2023-09-01 03:55:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:27,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:27,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:55:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:55:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:28,079 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 03:55:28,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 03:55:28,363 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-09-01 03:55:28,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:55:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:28,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:28,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326814541] [2023-09-01 03:55:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326814541] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:28,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:28,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010618939] [2023-09-01 03:55:28,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:28,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:28,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:28,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-09-01 03:55:28,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:28,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:28,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-09-01 03:55:28,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:29,740 INFO L130 PetriNetUnfolder]: 12922/16294 cut-off events. [2023-09-01 03:55:29,740 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 03:55:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32681 conditions, 16294 events. 12922/16294 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 79702 event pairs, 6132 based on Foata normal form. 0/4579 useless extension candidates. Maximal degree in co-relation 32668. Up to 16171 conditions per place. [2023-09-01 03:55:29,799 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-09-01 03:55:29,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 382 flow [2023-09-01 03:55:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-09-01 03:55:29,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-09-01 03:55:29,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-09-01 03:55:29,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-09-01 03:55:29,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:29,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-09-01 03:55:29,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:29,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:29,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:29,805 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 278 flow. Second operand 3 states and 564 transitions. [2023-09-01 03:55:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 382 flow [2023-09-01 03:55:29,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 363 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:29,807 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 241 flow [2023-09-01 03:55:29,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-09-01 03:55:29,808 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-09-01 03:55:29,808 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 241 flow [2023-09-01 03:55:29,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:29,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:29,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:55:29,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:30,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:30,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:30,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash 754613, now seen corresponding path program 1 times [2023-09-01 03:55:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:30,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134602047] [2023-09-01 03:55:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:30,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:30,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:30,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:30,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:55:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:55:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:30,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:30,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:30,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:30,139 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:55:30,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:55:30,154 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:55:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:55:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:30,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:55:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:30,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:30,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134602047] [2023-09-01 03:55:30,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134602047] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:30,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:55:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153717743] [2023-09-01 03:55:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:55:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:55:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:55:30,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-09-01 03:55:30,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:30,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:30,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-09-01 03:55:30,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:31,238 INFO L130 PetriNetUnfolder]: 9383/12032 cut-off events. [2023-09-01 03:55:31,238 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 03:55:31,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24138 conditions, 12032 events. 9383/12032 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 59505 event pairs, 4431 based on Foata normal form. 0/3766 useless extension candidates. Maximal degree in co-relation 24124. Up to 11909 conditions per place. [2023-09-01 03:55:31,284 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-09-01 03:55:31,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 337 flow [2023-09-01 03:55:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-09-01 03:55:31,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-09-01 03:55:31,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-09-01 03:55:31,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-09-01 03:55:31,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:31,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-09-01 03:55:31,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:31,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:31,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:31,291 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 241 flow. Second operand 3 states and 565 transitions. [2023-09-01 03:55:31,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 337 flow [2023-09-01 03:55:31,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:31,293 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 222 flow [2023-09-01 03:55:31,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-09-01 03:55:31,293 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2023-09-01 03:55:31,293 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 222 flow [2023-09-01 03:55:31,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:31,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:31,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:55:31,305 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 03:55:31,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:31,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:31,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 725200990, now seen corresponding path program 1 times [2023-09-01 03:55:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126986178] [2023-09-01 03:55:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:31,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:31,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:31,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:55:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:55:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:31,630 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 03:55:31,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 03:55:31,845 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 03:55:31,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:55:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:31,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:31,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:31,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126986178] [2023-09-01 03:55:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126986178] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:31,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:31,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:31,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627031487] [2023-09-01 03:55:31,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:31,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:31,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:31,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:32,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-09-01 03:55:32,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:32,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:32,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-09-01 03:55:32,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:32,931 INFO L130 PetriNetUnfolder]: 8864/11354 cut-off events. [2023-09-01 03:55:32,931 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 03:55:32,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22783 conditions, 11354 events. 8864/11354 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 55579 event pairs, 4176 based on Foata normal form. 0/3634 useless extension candidates. Maximal degree in co-relation 22768. Up to 11231 conditions per place. [2023-09-01 03:55:32,975 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:55:32,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 330 flow [2023-09-01 03:55:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-09-01 03:55:32,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-09-01 03:55:32,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-09-01 03:55:32,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-09-01 03:55:32,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:32,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-09-01 03:55:32,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:32,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:32,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:32,981 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 222 flow. Second operand 3 states and 560 transitions. [2023-09-01 03:55:32,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 330 flow [2023-09-01 03:55:32,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:32,983 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 219 flow [2023-09-01 03:55:32,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-09-01 03:55:32,983 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2023-09-01 03:55:32,983 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 219 flow [2023-09-01 03:55:32,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:32,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:32,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:55:32,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:33,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:33,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:33,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash 725200988, now seen corresponding path program 1 times [2023-09-01 03:55:33,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:33,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131423283] [2023-09-01 03:55:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:33,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:33,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:33,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:33,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:55:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:33,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:55:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:33,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:33,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:33,326 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:55:33,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 03:55:33,336 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 03:55:33,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:33,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:55:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:33,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:33,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131423283] [2023-09-01 03:55:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131423283] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:33,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:33,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:55:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895737951] [2023-09-01 03:55:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:33,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:55:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:55:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:55:33,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-09-01 03:55:33,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:33,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:33,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-09-01 03:55:33,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:34,201 INFO L130 PetriNetUnfolder]: 8345/10676 cut-off events. [2023-09-01 03:55:34,201 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 03:55:34,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 10676 events. 8345/10676 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 51694 event pairs, 3921 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 21412. Up to 10553 conditions per place. [2023-09-01 03:55:34,243 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-09-01 03:55:34,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 323 flow [2023-09-01 03:55:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-09-01 03:55:34,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2023-09-01 03:55:34,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-09-01 03:55:34,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-09-01 03:55:34,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:34,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-09-01 03:55:34,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:34,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:34,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:34,253 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 219 flow. Second operand 3 states and 561 transitions. [2023-09-01 03:55:34,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 323 flow [2023-09-01 03:55:34,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:34,255 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 216 flow [2023-09-01 03:55:34,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-09-01 03:55:34,256 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-09-01 03:55:34,257 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 216 flow [2023-09-01 03:55:34,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:34,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:34,257 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:55:34,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:34,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:34,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash 994275455, now seen corresponding path program 2 times [2023-09-01 03:55:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:34,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955421341] [2023-09-01 03:55:34,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:55:34,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:34,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:55:34,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:55:34,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:55:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:55:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:34,604 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:55:34,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:55:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:34,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:55:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:35,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:35,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955421341] [2023-09-01 03:55:35,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955421341] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:55:35,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:55:35,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:55:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517275272] [2023-09-01 03:55:35,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:55:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:55:35,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:55:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:55:38,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-09-01 03:55:38,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:38,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:38,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-09-01 03:55:38,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:40,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:42,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:44,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:45,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:47,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:49,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:54,838 INFO L130 PetriNetUnfolder]: 27803/35557 cut-off events. [2023-09-01 03:55:54,838 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-09-01 03:55:54,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71274 conditions, 35557 events. 27803/35557 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 188279 event pairs, 13070 based on Foata normal form. 12/12102 useless extension candidates. Maximal degree in co-relation 71257. Up to 3523 conditions per place. [2023-09-01 03:55:54,991 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-09-01 03:55:54,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 380 transitions, 1774 flow [2023-09-01 03:55:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:55:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:55:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2321 transitions. [2023-09-01 03:55:54,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48354166666666665 [2023-09-01 03:55:54,997 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2321 transitions. [2023-09-01 03:55:54,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2321 transitions. [2023-09-01 03:55:54,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:54,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2321 transitions. [2023-09-01 03:55:55,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 193.41666666666666) internal successors, (2321), 12 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:55,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:55,007 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:55,007 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 216 flow. Second operand 12 states and 2321 transitions. [2023-09-01 03:55:55,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 380 transitions, 1774 flow [2023-09-01 03:55:55,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:55,011 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 459 flow [2023-09-01 03:55:55,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-09-01 03:55:55,011 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-09-01 03:55:55,012 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 459 flow [2023-09-01 03:55:55,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:55,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:55,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:55:55,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:55,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:55,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:55,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1006388151, now seen corresponding path program 1 times [2023-09-01 03:55:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:55,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295986772] [2023-09-01 03:55:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:55,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:55,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:55,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:55:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:55,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:55:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:55,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:55,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:55,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295986772] [2023-09-01 03:55:55,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295986772] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:55,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:55,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:55:55,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013233243] [2023-09-01 03:55:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:55:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:55:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:55:55,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2023-09-01 03:55:55,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:55,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:55,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2023-09-01 03:55:55,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:57,435 INFO L130 PetriNetUnfolder]: 23353/30848 cut-off events. [2023-09-01 03:55:57,435 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-09-01 03:55:57,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61961 conditions, 30848 events. 23353/30848 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 175424 event pairs, 11908 based on Foata normal form. 1/11872 useless extension candidates. Maximal degree in co-relation 61936. Up to 28376 conditions per place. [2023-09-01 03:55:57,560 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 111 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2023-09-01 03:55:57,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 835 flow [2023-09-01 03:55:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:55:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:55:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 936 transitions. [2023-09-01 03:55:57,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468 [2023-09-01 03:55:57,563 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 936 transitions. [2023-09-01 03:55:57,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 936 transitions. [2023-09-01 03:55:57,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:57,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 936 transitions. [2023-09-01 03:55:57,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.2) internal successors, (936), 5 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,567 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,567 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 459 flow. Second operand 5 states and 936 transitions. [2023-09-01 03:55:57,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 835 flow [2023-09-01 03:55:57,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 129 transitions, 776 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 03:55:57,570 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 469 flow [2023-09-01 03:55:57,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-09-01 03:55:57,571 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 19 predicate places. [2023-09-01 03:55:57,571 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 469 flow [2023-09-01 03:55:57,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:57,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:55:57,578 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 03:55:57,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:57,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:55:57,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1133465548, now seen corresponding path program 1 times [2023-09-01 03:55:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360783062] [2023-09-01 03:55:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:57,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:57,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:57,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:57,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:55:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:55:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:57,900 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:55:57,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 03:55:57,920 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 18 treesize of output 16 [2023-09-01 03:55:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:57,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:55:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:57,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:57,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360783062] [2023-09-01 03:55:57,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360783062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:57,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:57,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:55:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710071476] [2023-09-01 03:55:57,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:55:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:55:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:55:58,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 400 [2023-09-01 03:55:58,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:58,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:58,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 400 [2023-09-01 03:55:58,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:00,188 INFO L130 PetriNetUnfolder]: 25566/32496 cut-off events. [2023-09-01 03:56:00,188 INFO L131 PetriNetUnfolder]: For 1848/1961 co-relation queries the response was YES. [2023-09-01 03:56:00,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71645 conditions, 32496 events. 25566/32496 cut-off events. For 1848/1961 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 170616 event pairs, 11840 based on Foata normal form. 113/13279 useless extension candidates. Maximal degree in co-relation 71616. Up to 32182 conditions per place. [2023-09-01 03:56:00,353 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 71 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-09-01 03:56:00,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 609 flow [2023-09-01 03:56:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:56:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:56:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-09-01 03:56:00,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608333333333333 [2023-09-01 03:56:00,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-09-01 03:56:00,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-09-01 03:56:00,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:00,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-09-01 03:56:00,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:00,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:00,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:00,358 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 469 flow. Second operand 3 states and 553 transitions. [2023-09-01 03:56:00,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 609 flow [2023-09-01 03:56:00,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 577 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:56:00,367 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 435 flow [2023-09-01 03:56:00,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-09-01 03:56:00,368 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2023-09-01 03:56:00,368 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 435 flow [2023-09-01 03:56:00,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:00,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:00,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:00,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:00,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:00,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1133465547, now seen corresponding path program 1 times [2023-09-01 03:56:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384227241] [2023-09-01 03:56:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:00,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:00,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:00,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:00,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:56:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:56:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:00,702 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:56:00,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 03:56:00,727 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:56:00,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:56:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:00,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:00,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384227241] [2023-09-01 03:56:00,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384227241] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:00,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:00,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:56:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28845460] [2023-09-01 03:56:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:56:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:56:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:56:00,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 400 [2023-09-01 03:56:00,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:00,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:00,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 400 [2023-09-01 03:56:00,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:03,228 INFO L130 PetriNetUnfolder]: 23669/30163 cut-off events. [2023-09-01 03:56:03,228 INFO L131 PetriNetUnfolder]: For 1998/2103 co-relation queries the response was YES. [2023-09-01 03:56:03,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66280 conditions, 30163 events. 23669/30163 cut-off events. For 1998/2103 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 157652 event pairs, 11077 based on Foata normal form. 105/12572 useless extension candidates. Maximal degree in co-relation 66251. Up to 29786 conditions per place. [2023-09-01 03:56:03,339 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 69 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 03:56:03,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 571 flow [2023-09-01 03:56:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:56:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:56:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-09-01 03:56:03,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-09-01 03:56:03,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-09-01 03:56:03,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-09-01 03:56:03,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:03,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-09-01 03:56:03,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,344 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 435 flow. Second operand 3 states and 548 transitions. [2023-09-01 03:56:03,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 571 flow [2023-09-01 03:56:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:56:03,351 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 432 flow [2023-09-01 03:56:03,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-09-01 03:56:03,351 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-09-01 03:56:03,352 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 432 flow [2023-09-01 03:56:03,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:03,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:03,363 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 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:03,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:03,561 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:03,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1881701959, now seen corresponding path program 1 times [2023-09-01 03:56:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:03,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904734860] [2023-09-01 03:56:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:03,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:03,563 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:03,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:56:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:56:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:03,732 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:56:03,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:56:03,789 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 03:56:03,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 03:56:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:03,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:04,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:04,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904734860] [2023-09-01 03:56:04,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904734860] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:04,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:04,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:56:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646801811] [2023-09-01 03:56:04,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:04,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:56:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:56:04,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:56:06,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 400 [2023-09-01 03:56:06,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 152.6) internal successors, (1526), 10 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:06,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:06,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 400 [2023-09-01 03:56:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:18,206 INFO L130 PetriNetUnfolder]: 89609/116410 cut-off events. [2023-09-01 03:56:18,207 INFO L131 PetriNetUnfolder]: For 6779/6779 co-relation queries the response was YES. [2023-09-01 03:56:18,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249596 conditions, 116410 events. 89609/116410 cut-off events. For 6779/6779 co-relation queries the response was YES. Maximal size of possible extension queue 5170. Compared 741944 event pairs, 31818 based on Foata normal form. 116/50497 useless extension candidates. Maximal degree in co-relation 249566. Up to 17191 conditions per place. [2023-09-01 03:56:19,026 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 477 selfloop transitions, 52 changer transitions 0/531 dead transitions. [2023-09-01 03:56:19,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 531 transitions, 2797 flow [2023-09-01 03:56:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:56:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:56:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4279 transitions. [2023-09-01 03:56:19,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279 [2023-09-01 03:56:19,034 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4279 transitions. [2023-09-01 03:56:19,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4279 transitions. [2023-09-01 03:56:19,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:19,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4279 transitions. [2023-09-01 03:56:19,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.16) internal successors, (4279), 25 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:19,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:19,051 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:19,051 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 432 flow. Second operand 25 states and 4279 transitions. [2023-09-01 03:56:19,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 531 transitions, 2797 flow [2023-09-01 03:56:19,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 531 transitions, 2796 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:56:19,132 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 784 flow [2023-09-01 03:56:19,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=784, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2023-09-01 03:56:19,133 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-09-01 03:56:19,133 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 784 flow [2023-09-01 03:56:19,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.6) internal successors, (1526), 10 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:19,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:19,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:19,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:19,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:19,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:19,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1881701960, now seen corresponding path program 1 times [2023-09-01 03:56:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:19,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077277522] [2023-09-01 03:56:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:19,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:19,363 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:19,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:56:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:56:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:19,520 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:56:19,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:56:19,552 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 03:56:19,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 03:56:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:56:19,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:19,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077277522] [2023-09-01 03:56:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077277522] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:19,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:19,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:56:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006592020] [2023-09-01 03:56:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:19,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:56:19,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:56:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:56:19,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 400 [2023-09-01 03:56:19,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 784 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:19,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:19,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 400 [2023-09-01 03:56:19,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:25,734 INFO L130 PetriNetUnfolder]: 57139/74345 cut-off events. [2023-09-01 03:56:25,734 INFO L131 PetriNetUnfolder]: For 114375/116288 co-relation queries the response was YES. [2023-09-01 03:56:26,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207143 conditions, 74345 events. 57139/74345 cut-off events. For 114375/116288 co-relation queries the response was YES. Maximal size of possible extension queue 3265. Compared 458097 event pairs, 28990 based on Foata normal form. 6962/41716 useless extension candidates. Maximal degree in co-relation 207104. Up to 73604 conditions per place. [2023-09-01 03:56:26,350 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 78 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2023-09-01 03:56:26,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 958 flow [2023-09-01 03:56:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:56:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:56:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 692 transitions. [2023-09-01 03:56:26,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2023-09-01 03:56:26,352 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 692 transitions. [2023-09-01 03:56:26,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 692 transitions. [2023-09-01 03:56:26,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:26,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 692 transitions. [2023-09-01 03:56:26,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:26,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:26,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:26,356 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 784 flow. Second operand 4 states and 692 transitions. [2023-09-01 03:56:26,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 958 flow [2023-09-01 03:56:26,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 859 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-09-01 03:56:26,711 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 703 flow [2023-09-01 03:56:26,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=703, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2023-09-01 03:56:26,711 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 44 predicate places. [2023-09-01 03:56:26,711 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 703 flow [2023-09-01 03:56:26,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:26,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:26,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:26,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:26,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:26,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:26,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 777687685, now seen corresponding path program 1 times [2023-09-01 03:56:26,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:26,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157221718] [2023-09-01 03:56:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:26,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:26,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:26,914 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:26,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:56:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:56:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:26,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 03:56:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:26,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:26,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:26,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157221718] [2023-09-01 03:56:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157221718] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:27,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:27,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:56:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624031252] [2023-09-01 03:56:27,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:27,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:56:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:27,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:56:27,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:56:27,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-09-01 03:56:27,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 703 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:27,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:27,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-09-01 03:56:27,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:31,312 INFO L130 PetriNetUnfolder]: 40412/53146 cut-off events. [2023-09-01 03:56:31,312 INFO L131 PetriNetUnfolder]: For 70336/71657 co-relation queries the response was YES. [2023-09-01 03:56:31,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147945 conditions, 53146 events. 40412/53146 cut-off events. For 70336/71657 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 321262 event pairs, 20327 based on Foata normal form. 1321/28653 useless extension candidates. Maximal degree in co-relation 147907. Up to 52458 conditions per place. [2023-09-01 03:56:31,723 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 76 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2023-09-01 03:56:31,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 875 flow [2023-09-01 03:56:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:56:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:56:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 698 transitions. [2023-09-01 03:56:31,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43625 [2023-09-01 03:56:31,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 698 transitions. [2023-09-01 03:56:31,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 698 transitions. [2023-09-01 03:56:31,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:31,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 698 transitions. [2023-09-01 03:56:31,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:31,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:31,729 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:31,729 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 703 flow. Second operand 4 states and 698 transitions. [2023-09-01 03:56:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 875 flow [2023-09-01 03:56:31,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 862 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:56:31,894 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 710 flow [2023-09-01 03:56:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=710, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2023-09-01 03:56:31,895 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2023-09-01 03:56:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 710 flow [2023-09-01 03:56:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:31,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:31,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:31,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:32,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:32,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:32,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 777687684, now seen corresponding path program 1 times [2023-09-01 03:56:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:32,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256519112] [2023-09-01 03:56:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:32,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:32,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:32,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:56:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:56:32,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:32,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:32,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:32,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256519112] [2023-09-01 03:56:32,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256519112] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:32,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:32,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:56:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917348023] [2023-09-01 03:56:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:56:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:56:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:56:32,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2023-09-01 03:56:32,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:32,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:32,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2023-09-01 03:56:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:36,246 INFO L130 PetriNetUnfolder]: 35866/48498 cut-off events. [2023-09-01 03:56:36,247 INFO L131 PetriNetUnfolder]: For 87894/89260 co-relation queries the response was YES. [2023-09-01 03:56:36,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140550 conditions, 48498 events. 35866/48498 cut-off events. For 87894/89260 co-relation queries the response was YES. Maximal size of possible extension queue 2255. Compared 310773 event pairs, 20671 based on Foata normal form. 1366/29721 useless extension candidates. Maximal degree in co-relation 140512. Up to 47843 conditions per place. [2023-09-01 03:56:36,636 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 103 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2023-09-01 03:56:36,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 132 transitions, 1036 flow [2023-09-01 03:56:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:56:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:56:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2023-09-01 03:56:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535 [2023-09-01 03:56:36,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2023-09-01 03:56:36,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2023-09-01 03:56:36,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:36,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2023-09-01 03:56:36,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:36,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:36,643 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:36,643 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 710 flow. Second operand 5 states and 907 transitions. [2023-09-01 03:56:36,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 132 transitions, 1036 flow [2023-09-01 03:56:37,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1022 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:56:37,030 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 747 flow [2023-09-01 03:56:37,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=747, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-09-01 03:56:37,030 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-09-01 03:56:37,031 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 747 flow [2023-09-01 03:56:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:37,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:37,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:37,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:37,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:37,232 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:37,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1796786889, now seen corresponding path program 1 times [2023-09-01 03:56:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:37,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817877327] [2023-09-01 03:56:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:37,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:37,233 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:37,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:56:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:37,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:56:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:37,392 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 03:56:37,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:37,494 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 03:56:37,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:37,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817877327] [2023-09-01 03:56:37,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817877327] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:37,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:37,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:56:37,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126765908] [2023-09-01 03:56:37,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:37,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:56:37,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:56:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:56:38,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 400 [2023-09-01 03:56:38,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 747 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:38,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:38,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 400 [2023-09-01 03:56:38,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:42,366 INFO L130 PetriNetUnfolder]: 28811/37807 cut-off events. [2023-09-01 03:56:42,367 INFO L131 PetriNetUnfolder]: For 38953/38995 co-relation queries the response was YES. [2023-09-01 03:56:42,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106477 conditions, 37807 events. 28811/37807 cut-off events. For 38953/38995 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 223951 event pairs, 7300 based on Foata normal form. 413/23006 useless extension candidates. Maximal degree in co-relation 106437. Up to 17496 conditions per place. [2023-09-01 03:56:42,641 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 161 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2023-09-01 03:56:42,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 1389 flow [2023-09-01 03:56:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 03:56:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 03:56:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2429 transitions. [2023-09-01 03:56:42,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43375 [2023-09-01 03:56:42,645 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2429 transitions. [2023-09-01 03:56:42,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2429 transitions. [2023-09-01 03:56:42,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:42,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2429 transitions. [2023-09-01 03:56:42,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.5) internal successors, (2429), 14 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:42,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:42,653 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:42,653 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 747 flow. Second operand 14 states and 2429 transitions. [2023-09-01 03:56:42,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 1389 flow [2023-09-01 03:56:42,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 204 transitions, 1339 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 03:56:42,867 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 788 flow [2023-09-01 03:56:42,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=788, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2023-09-01 03:56:42,868 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 54 predicate places. [2023-09-01 03:56:42,868 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 788 flow [2023-09-01 03:56:42,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:42,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:42,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:42,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:43,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:43,069 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:43,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 39721626, now seen corresponding path program 1 times [2023-09-01 03:56:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:43,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466751760] [2023-09-01 03:56:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:43,071 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:43,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:56:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:56:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:43,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:56:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:43,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:43,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:43,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466751760] [2023-09-01 03:56:43,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466751760] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:43,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:43,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:56:43,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607110239] [2023-09-01 03:56:43,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:43,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:56:43,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:56:43,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:56:43,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 400 [2023-09-01 03:56:43,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 788 flow. Second operand has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:43,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:43,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 400 [2023-09-01 03:56:43,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:48,028 INFO L130 PetriNetUnfolder]: 37222/49575 cut-off events. [2023-09-01 03:56:48,028 INFO L131 PetriNetUnfolder]: For 154831/157414 co-relation queries the response was YES. [2023-09-01 03:56:48,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156953 conditions, 49575 events. 37222/49575 cut-off events. For 154831/157414 co-relation queries the response was YES. Maximal size of possible extension queue 2179. Compared 311965 event pairs, 13910 based on Foata normal form. 2583/37600 useless extension candidates. Maximal degree in co-relation 156911. Up to 31913 conditions per place. [2023-09-01 03:56:48,545 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 98 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-09-01 03:56:48,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 1139 flow [2023-09-01 03:56:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:56:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:56:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 878 transitions. [2023-09-01 03:56:48,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439 [2023-09-01 03:56:48,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 878 transitions. [2023-09-01 03:56:48,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 878 transitions. [2023-09-01 03:56:48,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:48,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 878 transitions. [2023-09-01 03:56:48,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,550 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,550 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 788 flow. Second operand 5 states and 878 transitions. [2023-09-01 03:56:48,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 1139 flow [2023-09-01 03:56:48,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 121 transitions, 1097 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 03:56:48,707 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 784 flow [2023-09-01 03:56:48,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=784, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2023-09-01 03:56:48,708 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 55 predicate places. [2023-09-01 03:56:48,708 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 784 flow [2023-09-01 03:56:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:48,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:48,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:48,915 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:48,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash -128035769, now seen corresponding path program 1 times [2023-09-01 03:56:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010498533] [2023-09-01 03:56:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:48,917 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:48,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:56:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:56:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:49,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:49,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-09-01 03:56:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:49,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:49,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010498533] [2023-09-01 03:56:49,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010498533] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:49,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:49,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 03:56:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973175764] [2023-09-01 03:56:49,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:56:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:56:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:56:50,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-09-01 03:56:50,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 784 flow. Second operand has 10 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:50,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:50,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-09-01 03:56:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:58,235 INFO L130 PetriNetUnfolder]: 56517/77092 cut-off events. [2023-09-01 03:56:58,235 INFO L131 PetriNetUnfolder]: For 281587/287932 co-relation queries the response was YES. [2023-09-01 03:56:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250410 conditions, 77092 events. 56517/77092 cut-off events. For 281587/287932 co-relation queries the response was YES. Maximal size of possible extension queue 3139. Compared 530524 event pairs, 18038 based on Foata normal form. 6345/64324 useless extension candidates. Maximal degree in co-relation 250367. Up to 33770 conditions per place. [2023-09-01 03:56:59,033 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 177 selfloop transitions, 35 changer transitions 0/221 dead transitions. [2023-09-01 03:56:59,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 221 transitions, 1713 flow [2023-09-01 03:56:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:56:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:56:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1928 transitions. [2023-09-01 03:56:59,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381818181818182 [2023-09-01 03:56:59,173 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1928 transitions. [2023-09-01 03:56:59,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1928 transitions. [2023-09-01 03:56:59,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:59,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1928 transitions. [2023-09-01 03:56:59,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 175.27272727272728) internal successors, (1928), 11 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:59,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:59,178 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:59,178 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 784 flow. Second operand 11 states and 1928 transitions. [2023-09-01 03:56:59,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 221 transitions, 1713 flow [2023-09-01 03:56:59,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 221 transitions, 1677 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 03:56:59,418 INFO L231 Difference]: Finished difference. Result has 125 places, 103 transitions, 898 flow [2023-09-01 03:56:59,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=898, PETRI_PLACES=125, PETRI_TRANSITIONS=103} [2023-09-01 03:56:59,418 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2023-09-01 03:56:59,419 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 103 transitions, 898 flow [2023-09-01 03:56:59,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:59,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:59,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:59,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:59,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:56:59,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -128035771, now seen corresponding path program 1 times [2023-09-01 03:56:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:59,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788255961] [2023-09-01 03:56:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:59,622 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 03:56:59,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:59,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:59,625 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 (20)] Waiting until timeout for monitored process [2023-09-01 03:56:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:59,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:56:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:59,807 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:56:59,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:56:59,877 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:56:59,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:56:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:56:59,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:56:59,956 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:56:59,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:57:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:57:00,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:57:02,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:02,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788255961] [2023-09-01 03:57:02,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788255961] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:02,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:02,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:57:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848154536] [2023-09-01 03:57:02,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:02,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:57:02,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:57:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:57:06,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 400 [2023-09-01 03:57:06,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 103 transitions, 898 flow. Second operand has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:06,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:06,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 400 [2023-09-01 03:57:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:17,665 INFO L130 PetriNetUnfolder]: 53477/72936 cut-off events. [2023-09-01 03:57:17,665 INFO L131 PetriNetUnfolder]: For 300318/306151 co-relation queries the response was YES. [2023-09-01 03:57:18,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255994 conditions, 72936 events. 53477/72936 cut-off events. For 300318/306151 co-relation queries the response was YES. Maximal size of possible extension queue 2954. Compared 493425 event pairs, 19004 based on Foata normal form. 6949/67129 useless extension candidates. Maximal degree in co-relation 255946. Up to 15925 conditions per place. [2023-09-01 03:57:18,425 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 349 selfloop transitions, 68 changer transitions 0/426 dead transitions. [2023-09-01 03:57:18,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 426 transitions, 3048 flow [2023-09-01 03:57:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 03:57:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 03:57:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3792 transitions. [2023-09-01 03:57:18,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121739130434783 [2023-09-01 03:57:18,429 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3792 transitions. [2023-09-01 03:57:18,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3792 transitions. [2023-09-01 03:57:18,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:18,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3792 transitions. [2023-09-01 03:57:18,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 164.8695652173913) internal successors, (3792), 23 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:18,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:18,439 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:18,439 INFO L175 Difference]: Start difference. First operand has 125 places, 103 transitions, 898 flow. Second operand 23 states and 3792 transitions. [2023-09-01 03:57:18,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 426 transitions, 3048 flow [2023-09-01 03:57:18,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 426 transitions, 3007 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-09-01 03:57:18,749 INFO L231 Difference]: Finished difference. Result has 153 places, 131 transitions, 1269 flow [2023-09-01 03:57:18,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1269, PETRI_PLACES=153, PETRI_TRANSITIONS=131} [2023-09-01 03:57:18,750 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 95 predicate places. [2023-09-01 03:57:18,750 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 131 transitions, 1269 flow [2023-09-01 03:57:18,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:18,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:18,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:18,758 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 (20)] Ended with exit code 0 [2023-09-01 03:57:18,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:18,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:57:18,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash -691425590, now seen corresponding path program 2 times [2023-09-01 03:57:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:18,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579521133] [2023-09-01 03:57:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:57:18,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:18,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:18,962 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:18,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:57:19,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:57:19,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:57:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:57:19,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:19,154 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:57:19,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:57:19,216 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 03:57:19,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2023-09-01 03:57:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:57:19,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:57:19,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579521133] [2023-09-01 03:57:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579521133] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:19,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:19,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:57:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730211393] [2023-09-01 03:57:19,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:19,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:57:19,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:57:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:57:25,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 400 [2023-09-01 03:57:25,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 131 transitions, 1269 flow. Second operand has 14 states, 14 states have (on average 156.42857142857142) internal successors, (2190), 14 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:25,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:25,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 400 [2023-09-01 03:57:25,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:42,239 INFO L130 PetriNetUnfolder]: 81023/112074 cut-off events. [2023-09-01 03:57:42,239 INFO L131 PetriNetUnfolder]: For 445327/457021 co-relation queries the response was YES. [2023-09-01 03:57:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413503 conditions, 112074 events. 81023/112074 cut-off events. For 445327/457021 co-relation queries the response was YES. Maximal size of possible extension queue 4309. Compared 805526 event pairs, 23700 based on Foata normal form. 15566/107102 useless extension candidates. Maximal degree in co-relation 413447. Up to 46410 conditions per place. [2023-09-01 03:57:43,717 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 313 selfloop transitions, 31 changer transitions 0/352 dead transitions. [2023-09-01 03:57:43,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 352 transitions, 3099 flow [2023-09-01 03:57:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 03:57:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 03:57:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2239 transitions. [2023-09-01 03:57:43,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305769230769231 [2023-09-01 03:57:43,720 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2239 transitions. [2023-09-01 03:57:43,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2239 transitions. [2023-09-01 03:57:43,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:43,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2239 transitions. [2023-09-01 03:57:43,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.23076923076923) internal successors, (2239), 13 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:43,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:43,725 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:43,725 INFO L175 Difference]: Start difference. First operand has 153 places, 131 transitions, 1269 flow. Second operand 13 states and 2239 transitions. [2023-09-01 03:57:43,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 352 transitions, 3099 flow [2023-09-01 03:57:45,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 352 transitions, 2970 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-09-01 03:57:45,045 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 1325 flow [2023-09-01 03:57:45,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1325, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2023-09-01 03:57:45,046 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2023-09-01 03:57:45,046 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 1325 flow [2023-09-01 03:57:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.42857142857142) internal successors, (2190), 14 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:45,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:45,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:45,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-09-01 03:57:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:45,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:57:45,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1511699634, now seen corresponding path program 1 times [2023-09-01 03:57:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614326148] [2023-09-01 03:57:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:57:45,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:45,249 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:45,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 03:57:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:57:45,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:57:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:45,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:57:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:57:45,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:57:45,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:45,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614326148] [2023-09-01 03:57:45,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614326148] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:45,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:45,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:57:45,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085445782] [2023-09-01 03:57:45,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:45,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:57:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:57:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:57:49,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 400 [2023-09-01 03:57:49,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 1325 flow. Second operand has 14 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:49,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:49,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 400 [2023-09-01 03:57:49,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:18,844 INFO L130 PetriNetUnfolder]: 176949/243438 cut-off events. [2023-09-01 03:58:18,844 INFO L131 PetriNetUnfolder]: For 1288910/1312089 co-relation queries the response was YES. [2023-09-01 03:58:21,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952961 conditions, 243438 events. 176949/243438 cut-off events. For 1288910/1312089 co-relation queries the response was YES. Maximal size of possible extension queue 7710. Compared 1819483 event pairs, 20103 based on Foata normal form. 33585/232493 useless extension candidates. Maximal degree in co-relation 952901. Up to 48224 conditions per place. [2023-09-01 03:58:22,400 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 257 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2023-09-01 03:58:22,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 332 transitions, 3431 flow [2023-09-01 03:58:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:58:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:58:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1778 transitions. [2023-09-01 03:58:22,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445 [2023-09-01 03:58:22,404 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1778 transitions. [2023-09-01 03:58:22,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1778 transitions. [2023-09-01 03:58:22,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:22,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1778 transitions. [2023-09-01 03:58:22,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 177.8) internal successors, (1778), 10 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:22,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 400.0) internal successors, (4400), 11 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:22,407 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 400.0) internal successors, (4400), 11 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:22,407 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 1325 flow. Second operand 10 states and 1778 transitions. [2023-09-01 03:58:22,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 332 transitions, 3431 flow [2023-09-01 03:58:29,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 332 transitions, 3214 flow, removed 84 selfloop flow, removed 3 redundant places. [2023-09-01 03:58:29,926 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1873 flow [2023-09-01 03:58:29,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2023-09-01 03:58:29,927 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 117 predicate places. [2023-09-01 03:58:29,927 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1873 flow [2023-09-01 03:58:29,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:29,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:29,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:29,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:30,135 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 03:58:30,135 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:58:30,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1511699632, now seen corresponding path program 1 times [2023-09-01 03:58:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:30,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40137981] [2023-09-01 03:58:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:58:30,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:30,137 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 03:58:30,139 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 03:58:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:58:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:58:30,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:30,325 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 03:58:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:58:30,422 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 03:58:30,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40137981] [2023-09-01 03:58:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40137981] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:58:30,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:58:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:58:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837035038] [2023-09-01 03:58:30,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:58:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:58:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:58:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:58:30,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 400 [2023-09-01 03:58:30,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1873 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:30,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:30,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 400 [2023-09-01 03:58:30,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:59,449 INFO L130 PetriNetUnfolder]: 168275/231518 cut-off events. [2023-09-01 03:58:59,450 INFO L131 PetriNetUnfolder]: For 1239144/1260905 co-relation queries the response was YES. [2023-09-01 03:59:02,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998285 conditions, 231518 events. 168275/231518 cut-off events. For 1239144/1260905 co-relation queries the response was YES. Maximal size of possible extension queue 7465. Compared 1736646 event pairs, 89820 based on Foata normal form. 22391/211787 useless extension candidates. Maximal degree in co-relation 998218. Up to 168158 conditions per place. [2023-09-01 03:59:03,239 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 216 selfloop transitions, 42 changer transitions 0/268 dead transitions. [2023-09-01 03:59:03,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 268 transitions, 2733 flow [2023-09-01 03:59:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 03:59:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 03:59:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2418 transitions. [2023-09-01 03:59:03,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317857142857143 [2023-09-01 03:59:03,242 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2418 transitions. [2023-09-01 03:59:03,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2418 transitions. [2023-09-01 03:59:03,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:59:03,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2418 transitions. [2023-09-01 03:59:03,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 172.71428571428572) internal successors, (2418), 14 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:03,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:03,248 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:03,249 INFO L175 Difference]: Start difference. First operand has 175 places, 166 transitions, 1873 flow. Second operand 14 states and 2418 transitions. [2023-09-01 03:59:03,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 268 transitions, 2733 flow [2023-09-01 03:59:11,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 2694 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:59:11,480 INFO L231 Difference]: Finished difference. Result has 183 places, 150 transitions, 1724 flow [2023-09-01 03:59:11,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1724, PETRI_PLACES=183, PETRI_TRANSITIONS=150} [2023-09-01 03:59:11,484 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 125 predicate places. [2023-09-01 03:59:11,484 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 150 transitions, 1724 flow [2023-09-01 03:59:11,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:11,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:59:11,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 03:59:11,495 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 03:59:11,686 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 03:59:11,686 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 03:59:11,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:59:11,687 INFO L85 PathProgramCache]: Analyzing trace with hash 40648664, now seen corresponding path program 3 times [2023-09-01 03:59:11,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:59:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3281960] [2023-09-01 03:59:11,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:59:11,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:59:11,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:59:11,688 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 03:59:11,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:59:11,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:59:11,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:59:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:59:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:59:11,888 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:59:11,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:59:11,957 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 03:59:11,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2023-09-01 03:59:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:59:12,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:59:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:59:12,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:59:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3281960] [2023-09-01 03:59:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3281960] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:59:12,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:59:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 03:59:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664844204] [2023-09-01 03:59:12,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:59:12,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:59:12,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:59:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:59:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:59:19,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 400 [2023-09-01 03:59:19,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 150 transitions, 1724 flow. Second operand has 16 states, 16 states have (on average 155.375) internal successors, (2486), 16 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:19,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:59:19,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 400 [2023-09-01 03:59:19,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand