./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:46:31,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:46:31,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:46:32,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:46:32,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:46:32,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:46:32,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:46:32,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:46:32,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:46:32,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:46:32,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:46:32,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:46:32,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:46:32,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:46:32,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:46:32,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:46:32,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:46:32,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:46:32,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:46:32,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:46:32,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:46:32,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:46:32,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:46:32,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:46:32,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:46:32,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:46:32,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:46:32,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:46:32,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:46:32,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:46:32,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:46:32,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:46:32,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:46:32,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:46:32,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:46:32,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:46:32,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:46:32,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:46:32,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:46:32,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:46:32,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:46:32,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:46:32,095 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:46:32,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:46:32,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:46:32,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:46:32,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:46:32,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:46:32,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:46:32,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:46:32,097 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:46:32,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:46:32,098 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:46:32,098 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:46:32,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:46:32,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:46:32,100 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:46:32,100 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:46:32,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:46:32,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:46:32,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:46:32,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:46:32,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:46:32,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:46:32,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:46:32,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:46:32,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:46:32,101 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:46:32,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:46:32,102 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:46:32,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:46:32,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:46:32,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:46:32,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:46:32,350 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:46:32,350 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:46:32,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-29 23:46:33,231 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:46:33,419 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:46:33,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-29 23:46:33,427 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6871eda22/debee1a8edb544fba6bfe089fcaa5d91/FLAGbf971ab46 [2023-08-29 23:46:33,435 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6871eda22/debee1a8edb544fba6bfe089fcaa5d91 [2023-08-29 23:46:33,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:46:33,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:46:33,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:46:33,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:46:33,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:46:33,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:33" (1/1) ... [2023-08-29 23:46:33,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3dfee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:33, skipping insertion in model container [2023-08-29 23:46:33,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:33" (1/1) ... [2023-08-29 23:46:33,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:46:33,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:46:33,625 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-29 23:46:33,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:46:33,644 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:46:33,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a68421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:33, skipping insertion in model container [2023-08-29 23:46:33,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:46:33,647 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:46:33,648 INFO L158 Benchmark]: Toolchain (without parser) took 209.97ms. Allocated memory is still 75.5MB. Free memory was 53.0MB in the beginning and 42.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:46:33,648 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:46:33,649 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.61ms. Allocated memory is still 75.5MB. Free memory was 52.9MB in the beginning and 42.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:46:33,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.61ms. Allocated memory is still 75.5MB. Free memory was 52.9MB in the beginning and 42.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:46:34,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:46:34,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:46:34,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:46:34,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:46:34,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:46:34,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:46:35,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:46:35,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:46:35,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:46:35,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:46:35,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:46:35,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:46:35,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:46:35,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:46:35,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:46:35,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:46:35,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:46:35,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:46:35,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:46:35,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:46:35,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:46:35,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:46:35,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:46:35,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:46:35,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:46:35,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:46:35,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:46:35,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:46:35,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:46:35,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:46:35,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:46:35,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:46:35,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:46:35,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:46:35,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:46:35,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:46:35,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:46:35,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:46:35,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:46:35,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:46:35,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:46:35,056 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:46:35,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:46:35,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:46:35,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:46:35,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:46:35,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:46:35,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:46:35,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:46:35,059 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:46:35,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:46:35,059 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:46:35,059 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:46:35,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:46:35,061 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:46:35,061 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:46:35,061 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:46:35,061 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:46:35,061 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:46:35,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:46:35,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:46:35,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:46:35,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:46:35,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:46:35,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:46:35,062 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:46:35,062 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:46:35,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:46:35,063 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:46:35,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:46:35,063 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:46:35,063 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:46:35,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:46:35,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:46:35,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:46:35,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:46:35,333 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:46:35,334 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:46:35,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-29 23:46:36,165 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:46:36,344 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:46:36,345 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-29 23:46:36,352 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fc181de/76e1ed619b7441d2995c576f256eb0f8/FLAG677a01036 [2023-08-29 23:46:36,363 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fc181de/76e1ed619b7441d2995c576f256eb0f8 [2023-08-29 23:46:36,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:46:36,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:46:36,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:46:36,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:46:36,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:46:36,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1211ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36, skipping insertion in model container [2023-08-29 23:46:36,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:46:36,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:46:36,550 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-29 23:46:36,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:46:36,566 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:46:36,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:46:36,596 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-29 23:46:36,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:46:36,617 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:46:36,648 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-29 23:46:36,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:46:36,669 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:46:36,670 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:46:36,674 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:46:36,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36 WrapperNode [2023-08-29 23:46:36,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:46:36,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:46:36,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:46:36,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:46:36,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,746 INFO L138 Inliner]: procedures = 28, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 313 [2023-08-29 23:46:36,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:46:36,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:46:36,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:46:36,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:46:36,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,795 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:46:36,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:46:36,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:46:36,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:46:36,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (1/1) ... [2023-08-29 23:46:36,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:46:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:46:36,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:46:36,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:46:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:46:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:46:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:46:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:46:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:46:36,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:46:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:46:36,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:46:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:46:36,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:46:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:46:36,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:46:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:46:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:46:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:46:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:46:36,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:46:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:46:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:46:36,867 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:46:36,948 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:46:36,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:46:37,439 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:46:37,599 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:46:37,599 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:46:37,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:37 BoogieIcfgContainer [2023-08-29 23:46:37,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:46:37,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:46:37,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:46:37,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:46:37,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:46:36" (1/3) ... [2023-08-29 23:46:37,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbe0eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:46:37, skipping insertion in model container [2023-08-29 23:46:37,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:36" (2/3) ... [2023-08-29 23:46:37,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbe0eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:46:37, skipping insertion in model container [2023-08-29 23:46:37,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:37" (3/3) ... [2023-08-29 23:46:37,607 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-08-29 23:46:37,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:46:37,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-29 23:46:37,617 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:46:37,686 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 23:46:37,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 258 transitions, 548 flow [2023-08-29 23:46:37,789 INFO L130 PetriNetUnfolder]: 19/254 cut-off events. [2023-08-29 23:46:37,789 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:46:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 254 events. 19/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2023-08-29 23:46:37,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 258 transitions, 548 flow [2023-08-29 23:46:37,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 250 transitions, 524 flow [2023-08-29 23:46:37,804 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:46:37,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 250 transitions, 524 flow [2023-08-29 23:46:37,815 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 250 transitions, 524 flow [2023-08-29 23:46:37,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 250 transitions, 524 flow [2023-08-29 23:46:37,848 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-08-29 23:46:37,848 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:46:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 250 events. 19/250 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 218 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2023-08-29 23:46:37,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-29 23:47:02,057 INFO L134 LiptonReduction]: Checked pairs total: 5485 [2023-08-29 23:47:02,058 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-29 23:47:02,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:47:02,070 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;@4f4567a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:47:02,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-29 23:47:02,072 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:47:02,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:47:02,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:02,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:47:02,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:02,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash 38083, now seen corresponding path program 1 times [2023-08-29 23:47:02,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877857626] [2023-08-29 23:47:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:02,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:02,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:02,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:47:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:47:02,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:02,362 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:47:02,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:47:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:02,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:02,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:02,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877857626] [2023-08-29 23:47:02,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877857626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:02,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:02,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:47:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60679169] [2023-08-29 23:47:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:47:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:02,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:47:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:47:02,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 522 [2023-08-29 23:47:02,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:02,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:02,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 522 [2023-08-29 23:47:02,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:05,856 INFO L130 PetriNetUnfolder]: 31228/39023 cut-off events. [2023-08-29 23:47:05,857 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-29 23:47:05,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78387 conditions, 39023 events. 31228/39023 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 207777 event pairs, 20215 based on Foata normal form. 0/10691 useless extension candidates. Maximal degree in co-relation 34221. Up to 19215 conditions per place. [2023-08-29 23:47:06,085 INFO L137 encePairwiseOnDemand]: 515/522 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-08-29 23:47:06,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 504 flow [2023-08-29 23:47:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-29 23:47:06,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47956577266922096 [2023-08-29 23:47:06,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-29 23:47:06,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-29 23:47:06,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:06,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-29 23:47:06,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:06,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:06,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:06,122 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 751 transitions. [2023-08-29 23:47:06,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 504 flow [2023-08-29 23:47:06,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 117 transitions, 472 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:47:06,155 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 166 flow [2023-08-29 23:47:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-08-29 23:47:06,158 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-08-29 23:47:06,158 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 166 flow [2023-08-29 23:47:06,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:06,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:06,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:47:06,166 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 [2023-08-29 23:47:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:06,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:06,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 38082, now seen corresponding path program 1 times [2023-08-29 23:47:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389014960] [2023-08-29 23:47:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:06,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:06,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:06,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:47:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:06,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:47:06,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:06,509 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:47:06,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:47:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:06,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:06,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389014960] [2023-08-29 23:47:06,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389014960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:06,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:06,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:47:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153766181] [2023-08-29 23:47:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:06,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:47:06,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:47:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:47:06,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 522 [2023-08-29 23:47:06,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:06,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:06,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 522 [2023-08-29 23:47:06,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:09,143 INFO L130 PetriNetUnfolder]: 31233/39019 cut-off events. [2023-08-29 23:47:09,143 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:47:09,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77777 conditions, 39019 events. 31233/39019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 208324 event pairs, 20218 based on Foata normal form. 2/10239 useless extension candidates. Maximal degree in co-relation 38877. Up to 38429 conditions per place. [2023-08-29 23:47:09,320 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 57 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-29 23:47:09,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 278 flow [2023-08-29 23:47:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-29 23:47:09,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425287356321839 [2023-08-29 23:47:09,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-29 23:47:09,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-29 23:47:09,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:09,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-29 23:47:09,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:09,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:09,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:09,328 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 166 flow. Second operand 3 states and 693 transitions. [2023-08-29 23:47:09,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 278 flow [2023-08-29 23:47:09,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:47:09,330 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 156 flow [2023-08-29 23:47:09,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-29 23:47:09,331 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-29 23:47:09,332 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 156 flow [2023-08-29 23:47:09,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:09,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:09,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:47:09,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:09,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:09,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:09,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1184525, now seen corresponding path program 1 times [2023-08-29 23:47:09,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:09,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173684798] [2023-08-29 23:47:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:09,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:09,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:09,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:47:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:09,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:47:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:09,734 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:47:09,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:47:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:09,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:47:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:09,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173684798] [2023-08-29 23:47:09,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173684798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:47:09,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:47:09,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:47:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516858604] [2023-08-29 23:47:09,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:47:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:47:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:47:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:47:10,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 522 [2023-08-29 23:47:10,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:10,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:10,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 522 [2023-08-29 23:47:10,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:15,415 INFO L130 PetriNetUnfolder]: 46847/58539 cut-off events. [2023-08-29 23:47:15,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:47:15,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116662 conditions, 58539 events. 46847/58539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 321685 event pairs, 30321 based on Foata normal form. 0/16274 useless extension candidates. Maximal degree in co-relation 116654. Up to 19216 conditions per place. [2023-08-29 23:47:15,635 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 152 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2023-08-29 23:47:15,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 177 transitions, 758 flow [2023-08-29 23:47:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:47:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:47:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-08-29 23:47:15,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434865900383142 [2023-08-29 23:47:15,638 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-08-29 23:47:15,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-08-29 23:47:15,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:15,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-08-29 23:47:15,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:15,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 522.0) internal successors, (3654), 7 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:15,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 522.0) internal successors, (3654), 7 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:15,646 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 156 flow. Second operand 6 states and 1389 transitions. [2023-08-29 23:47:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 177 transitions, 758 flow [2023-08-29 23:47:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 757 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:15,649 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 300 flow [2023-08-29 23:47:15,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-29 23:47:15,649 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2023-08-29 23:47:15,650 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 300 flow [2023-08-29 23:47:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:15,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:47:15,656 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 [2023-08-29 23:47:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:15,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:15,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1185598, now seen corresponding path program 1 times [2023-08-29 23:47:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:15,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317453609] [2023-08-29 23:47:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:15,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:15,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:15,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:47:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:47:15,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:16,073 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-29 23:47:16,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-29 23:47:16,328 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-29 23:47:16,328 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 [2023-08-29 23:47:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:16,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:16,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:16,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317453609] [2023-08-29 23:47:16,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317453609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:16,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:16,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:47:16,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204838562] [2023-08-29 23:47:16,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:16,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:47:16,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:47:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:47:16,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-08-29 23:47:16,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:16,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:16,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-08-29 23:47:16,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:20,105 INFO L130 PetriNetUnfolder]: 37855/47659 cut-off events. [2023-08-29 23:47:20,105 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:47:20,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94979 conditions, 47659 events. 37855/47659 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 264540 event pairs, 24327 based on Foata normal form. 0/13489 useless extension candidates. Maximal degree in co-relation 94966. Up to 46774 conditions per place. [2023-08-29 23:47:20,293 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 68 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-29 23:47:20,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 418 flow [2023-08-29 23:47:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-29 23:47:20,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699872286079184 [2023-08-29 23:47:20,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-29 23:47:20,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-29 23:47:20,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:20,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-29 23:47:20,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:20,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:20,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:20,300 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 300 flow. Second operand 3 states and 700 transitions. [2023-08-29 23:47:20,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 418 flow [2023-08-29 23:47:20,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 399 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:20,302 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 263 flow [2023-08-29 23:47:20,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-29 23:47:20,303 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-29 23:47:20,303 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 263 flow [2023-08-29 23:47:20,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:20,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:20,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:47:20,325 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 [2023-08-29 23:47:20,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:20,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:20,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1185597, now seen corresponding path program 1 times [2023-08-29 23:47:20,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:20,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577860024] [2023-08-29 23:47:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:20,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:20,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:20,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:47:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:20,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:47:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,720 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-29 23:47:20,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-29 23:47:20,749 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-29 23:47:20,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-29 23:47:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:20,786 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 [2023-08-29 23:47:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:20,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:20,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:20,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577860024] [2023-08-29 23:47:20,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577860024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:20,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:20,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928784109] [2023-08-29 23:47:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:20,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:47:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:47:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:47:20,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-08-29 23:47:20,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:20,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:20,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-08-29 23:47:20,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:23,482 INFO L130 PetriNetUnfolder]: 28853/36779 cut-off events. [2023-08-29 23:47:23,482 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:47:23,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73200 conditions, 36779 events. 28853/36779 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 204744 event pairs, 18327 based on Foata normal form. 0/11614 useless extension candidates. Maximal degree in co-relation 73186. Up to 35894 conditions per place. [2023-08-29 23:47:23,652 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-29 23:47:23,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 373 flow [2023-08-29 23:47:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2023-08-29 23:47:23,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495530012771392 [2023-08-29 23:47:23,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2023-08-29 23:47:23,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2023-08-29 23:47:23,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:23,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2023-08-29 23:47:23,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:23,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:23,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:23,659 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 263 flow. Second operand 3 states and 704 transitions. [2023-08-29 23:47:23,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 373 flow [2023-08-29 23:47:23,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:23,661 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 244 flow [2023-08-29 23:47:23,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-29 23:47:23,662 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-08-29 23:47:23,662 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 244 flow [2023-08-29 23:47:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:23,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:23,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:47:23,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:23,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:23,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:23,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1139386454, now seen corresponding path program 1 times [2023-08-29 23:47:23,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349199552] [2023-08-29 23:47:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:23,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:23,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:23,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:47:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:47:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:24,091 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-29 23:47:24,092 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 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-29 23:47:24,337 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 23:47:24,337 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 [2023-08-29 23:47:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:24,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:24,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:24,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349199552] [2023-08-29 23:47:24,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349199552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:24,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:47:24,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930360316] [2023-08-29 23:47:24,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:24,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:47:24,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:24,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:47:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:47:24,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-08-29 23:47:24,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:24,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:24,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-08-29 23:47:24,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:26,950 INFO L130 PetriNetUnfolder]: 27632/35168 cut-off events. [2023-08-29 23:47:26,950 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:47:26,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69979 conditions, 35168 events. 27632/35168 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 193778 event pairs, 17418 based on Foata normal form. 0/11311 useless extension candidates. Maximal degree in co-relation 69964. Up to 34283 conditions per place. [2023-08-29 23:47:27,073 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-29 23:47:27,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 366 flow [2023-08-29 23:47:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-08-29 23:47:27,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-29 23:47:27,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-08-29 23:47:27,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-08-29 23:47:27,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:27,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-08-29 23:47:27,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:27,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:27,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:27,081 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 244 flow. Second operand 3 states and 696 transitions. [2023-08-29 23:47:27,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 366 flow [2023-08-29 23:47:27,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:27,082 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2023-08-29 23:47:27,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-29 23:47:27,083 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-29 23:47:27,083 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2023-08-29 23:47:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:27,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:27,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:47:27,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:27,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:27,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:27,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1139386455, now seen corresponding path program 1 times [2023-08-29 23:47:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:27,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073619563] [2023-08-29 23:47:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:27,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:27,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:27,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:27,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:47:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:47:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,477 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-29 23:47:27,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-29 23:47:27,499 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:47:27,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-29 23:47:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:27,536 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 [2023-08-29 23:47:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:27,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:27,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:27,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073619563] [2023-08-29 23:47:27,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073619563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:27,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:27,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:27,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582386836] [2023-08-29 23:47:27,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:27,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:47:27,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:27,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:47:27,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:47:27,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-08-29 23:47:27,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:27,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:27,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-08-29 23:47:27,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:29,771 INFO L130 PetriNetUnfolder]: 26411/33557 cut-off events. [2023-08-29 23:47:29,771 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:47:29,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66758 conditions, 33557 events. 26411/33557 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 183481 event pairs, 16509 based on Foata normal form. 0/11008 useless extension candidates. Maximal degree in co-relation 66742. Up to 32672 conditions per place. [2023-08-29 23:47:29,919 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-29 23:47:29,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2023-08-29 23:47:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-29 23:47:29,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699872286079184 [2023-08-29 23:47:29,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-29 23:47:29,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-29 23:47:29,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:29,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-29 23:47:29,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:29,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:29,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:29,925 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 700 transitions. [2023-08-29 23:47:29,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2023-08-29 23:47:29,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:29,926 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2023-08-29 23:47:29,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-29 23:47:29,927 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-29 23:47:29,927 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2023-08-29 23:47:29,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:29,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:29,928 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:47:29,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-29 23:47:30,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:30,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:30,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash 932370243, now seen corresponding path program 2 times [2023-08-29 23:47:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:30,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402430799] [2023-08-29 23:47:30,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:47:30,136 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 [2023-08-29 23:47:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:30,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:30,139 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 (9)] Waiting until timeout for monitored process [2023-08-29 23:47:30,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:47:30,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:47:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:47:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:30,337 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:47:30,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:47:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:47:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:30,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:30,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402430799] [2023-08-29 23:47:30,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402430799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:47:30,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:47:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:47:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951286918] [2023-08-29 23:47:30,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:47:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:47:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:47:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:47:34,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 522 [2023-08-29 23:47:34,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:34,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:34,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 522 [2023-08-29 23:47:34,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:37,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:38,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:39,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:41,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:43,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:45,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:56,538 INFO L130 PetriNetUnfolder]: 87978/111827 cut-off events. [2023-08-29 23:47:56,538 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 23:47:56,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222275 conditions, 111827 events. 87978/111827 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 4455. Compared 666746 event pairs, 55003 based on Foata normal form. 12/38526 useless extension candidates. Maximal degree in co-relation 222258. Up to 10896 conditions per place. [2023-08-29 23:47:57,058 INFO L137 encePairwiseOnDemand]: 515/522 looper letters, 415 selfloop transitions, 32 changer transitions 0/453 dead transitions. [2023-08-29 23:47:57,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 453 transitions, 2080 flow [2023-08-29 23:47:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:47:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:47:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2907 transitions. [2023-08-29 23:47:57,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640804597701149 [2023-08-29 23:47:57,064 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2907 transitions. [2023-08-29 23:47:57,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2907 transitions. [2023-08-29 23:47:57,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:57,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2907 transitions. [2023-08-29 23:47:57,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 242.25) internal successors, (2907), 12 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:57,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 522.0) internal successors, (6786), 13 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:57,075 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 522.0) internal successors, (6786), 13 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:57,075 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 12 states and 2907 transitions. [2023-08-29 23:47:57,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 453 transitions, 2080 flow [2023-08-29 23:47:57,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 453 transitions, 2079 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:57,079 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 481 flow [2023-08-29 23:47:57,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=481, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-29 23:47:57,080 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-08-29 23:47:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 481 flow [2023-08-29 23:47:57,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:57,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:57,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:47:57,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:57,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:57,290 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:57,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash 961234650, now seen corresponding path program 1 times [2023-08-29 23:47:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:57,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528775414] [2023-08-29 23:47:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:57,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:57,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:57,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:47:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:47:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:57,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:57,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528775414] [2023-08-29 23:47:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528775414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:57,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13257747] [2023-08-29 23:47:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:47:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:47:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:47:57,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 522 [2023-08-29 23:47:57,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:57,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:57,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 522 [2023-08-29 23:47:57,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:48:06,559 INFO L130 PetriNetUnfolder]: 100374/129400 cut-off events. [2023-08-29 23:48:06,559 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-29 23:48:06,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257388 conditions, 129400 events. 100374/129400 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 5120. Compared 816741 event pairs, 63900 based on Foata normal form. 0/47789 useless extension candidates. Maximal degree in co-relation 257363. Up to 108766 conditions per place. [2023-08-29 23:48:07,285 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 127 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-08-29 23:48:07,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 970 flow [2023-08-29 23:48:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:48:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:48:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 948 transitions. [2023-08-29 23:48:07,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540229885057471 [2023-08-29 23:48:07,288 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 948 transitions. [2023-08-29 23:48:07,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 948 transitions. [2023-08-29 23:48:07,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:48:07,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 948 transitions. [2023-08-29 23:48:07,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:07,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 522.0) internal successors, (2610), 5 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:07,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 522.0) internal successors, (2610), 5 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:07,292 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 481 flow. Second operand 4 states and 948 transitions. [2023-08-29 23:48:07,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 970 flow [2023-08-29 23:48:07,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 887 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-29 23:48:07,295 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 441 flow [2023-08-29 23:48:07,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-29 23:48:07,296 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-08-29 23:48:07,296 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 441 flow [2023-08-29 23:48:07,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:07,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:48:07,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:48:07,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-29 23:48:07,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:48:07,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:48:07,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:48:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1132425180, now seen corresponding path program 1 times [2023-08-29 23:48:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:48:07,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376533482] [2023-08-29 23:48:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:48:07,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:48:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:48:07,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:48:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:48:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:48:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:48:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:48:07,730 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:48:07,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:48:07,875 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:48:07,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:48:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:48:07,986 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 [2023-08-29 23:48:07,993 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:48:07,993 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 [2023-08-29 23:48:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:48:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:48:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:48:09,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:48:09,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376533482] [2023-08-29 23:48:09,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376533482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:48:09,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:48:09,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:48:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340491878] [2023-08-29 23:48:09,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:48:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:48:09,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:48:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:48:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:48:17,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 522 [2023-08-29 23:48:17,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:17,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:48:17,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 522 [2023-08-29 23:48:17,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:48:24,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:31,051 WARN L222 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:49:02,692 INFO L130 PetriNetUnfolder]: 213466/274754 cut-off events. [2023-08-29 23:49:02,692 INFO L131 PetriNetUnfolder]: For 29970/29970 co-relation queries the response was YES. [2023-08-29 23:49:03,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619048 conditions, 274754 events. 213466/274754 cut-off events. For 29970/29970 co-relation queries the response was YES. Maximal size of possible extension queue 10173. Compared 1846742 event pairs, 134750 based on Foata normal form. 0/134733 useless extension candidates. Maximal degree in co-relation 619021. Up to 108731 conditions per place. [2023-08-29 23:49:04,379 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 235 selfloop transitions, 29 changer transitions 0/270 dead transitions. [2023-08-29 23:49:04,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 270 transitions, 1603 flow [2023-08-29 23:49:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:49:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:49:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3101 transitions. [2023-08-29 23:49:04,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960408684546616 [2023-08-29 23:49:04,386 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3101 transitions. [2023-08-29 23:49:04,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3101 transitions. [2023-08-29 23:49:04,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:49:04,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3101 transitions. [2023-08-29 23:49:04,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:04,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 522.0) internal successors, (8352), 16 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:04,397 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 522.0) internal successors, (8352), 16 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:04,397 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 441 flow. Second operand 15 states and 3101 transitions. [2023-08-29 23:49:04,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 270 transitions, 1603 flow [2023-08-29 23:49:04,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 270 transitions, 1597 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:49:04,412 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 666 flow [2023-08-29 23:49:04,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=666, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2023-08-29 23:49:04,413 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-08-29 23:49:04,413 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 666 flow [2023-08-29 23:49:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:04,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:49:04,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:49:04,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:49:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:04,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:49:04,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:49:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash -266250333, now seen corresponding path program 1 times [2023-08-29 23:49:04,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:49:04,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878580164] [2023-08-29 23:49:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:49:04,622 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 [2023-08-29 23:49:04,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:49:04,623 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:49:04,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:49:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:49:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:49:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:49:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:04,809 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-08-29 23:49:04,809 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 5 case distinctions, treesize of input 36 treesize of output 63 [2023-08-29 23:49:04,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:49:04,875 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 [2023-08-29 23:49:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:49:04,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:49:04,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:49:04,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878580164] [2023-08-29 23:49:04,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878580164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:49:04,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:49:04,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:49:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301070908] [2023-08-29 23:49:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:49:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:49:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:49:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:49:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:49:05,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-08-29 23:49:05,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:05,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:49:05,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-08-29 23:49:05,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:49:27,530 INFO L130 PetriNetUnfolder]: 210246/269886 cut-off events. [2023-08-29 23:49:27,530 INFO L131 PetriNetUnfolder]: For 142041/142041 co-relation queries the response was YES. [2023-08-29 23:49:28,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643094 conditions, 269886 events. 210246/269886 cut-off events. For 142041/142041 co-relation queries the response was YES. Maximal size of possible extension queue 10476. Compared 1817426 event pairs, 132630 based on Foata normal form. 0/137256 useless extension candidates. Maximal degree in co-relation 643061. Up to 262506 conditions per place. [2023-08-29 23:49:29,347 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 93 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-08-29 23:49:29,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 850 flow [2023-08-29 23:49:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:49:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:49:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-29 23:49:29,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189016602809705 [2023-08-29 23:49:29,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-29 23:49:29,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-29 23:49:29,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:49:29,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-29 23:49:29,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:29,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:29,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:29,351 INFO L175 Difference]: Start difference. First operand has 103 places, 102 transitions, 666 flow. Second operand 3 states and 692 transitions. [2023-08-29 23:49:29,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 850 flow [2023-08-29 23:49:29,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 831 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-29 23:49:29,458 INFO L231 Difference]: Finished difference. Result has 102 places, 100 transitions, 645 flow [2023-08-29 23:49:29,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=645, PETRI_PLACES=102, PETRI_TRANSITIONS=100} [2023-08-29 23:49:29,459 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2023-08-29 23:49:29,459 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 100 transitions, 645 flow [2023-08-29 23:49:29,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:29,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:49:29,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:49:29,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:49:29,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:29,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:49:29,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:49:29,660 INFO L85 PathProgramCache]: Analyzing trace with hash -266250332, now seen corresponding path program 1 times [2023-08-29 23:49:29,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:49:29,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438926835] [2023-08-29 23:49:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:49:29,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:49:29,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:49:29,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:49:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:49:29,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:49:29,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:49:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:29,901 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 23:49:29,902 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 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-29 23:49:29,921 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 [2023-08-29 23:49:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:29,967 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 [2023-08-29 23:49:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:49:30,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:49:30,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:49:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438926835] [2023-08-29 23:49:30,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438926835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:49:30,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:49:30,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:49:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368725494] [2023-08-29 23:49:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:49:30,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:49:30,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:49:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:49:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:49:30,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-08-29 23:49:30,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 100 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:30,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:49:30,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-08-29 23:49:30,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:49:52,049 INFO L130 PetriNetUnfolder]: 206966/265106 cut-off events. [2023-08-29 23:49:52,049 INFO L131 PetriNetUnfolder]: For 140880/140880 co-relation queries the response was YES. [2023-08-29 23:49:52,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632027 conditions, 265106 events. 206966/265106 cut-off events. For 140880/140880 co-relation queries the response was YES. Maximal size of possible extension queue 10352. Compared 1775534 event pairs, 130450 based on Foata normal form. 0/135776 useless extension candidates. Maximal degree in co-relation 631993. Up to 257726 conditions per place. [2023-08-29 23:49:53,893 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 91 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-08-29 23:49:53,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 825 flow [2023-08-29 23:49:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:49:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:49:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-08-29 23:49:53,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-29 23:49:53,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-08-29 23:49:53,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-08-29 23:49:53,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:49:53,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-08-29 23:49:53,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:53,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:53,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:53,897 INFO L175 Difference]: Start difference. First operand has 102 places, 100 transitions, 645 flow. Second operand 3 states and 696 transitions. [2023-08-29 23:49:53,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 825 flow [2023-08-29 23:49:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 98 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:49:53,997 INFO L231 Difference]: Finished difference. Result has 101 places, 98 transitions, 642 flow [2023-08-29 23:49:53,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=642, PETRI_PLACES=101, PETRI_TRANSITIONS=98} [2023-08-29 23:49:53,997 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2023-08-29 23:49:53,998 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 98 transitions, 642 flow [2023-08-29 23:49:53,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:53,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:49:53,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:49:54,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-29 23:49:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:54,205 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:49:54,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:49:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1132425181, now seen corresponding path program 1 times [2023-08-29 23:49:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:49:54,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282256398] [2023-08-29 23:49:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:49:54,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:54,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:49:54,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:49:54,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:49:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:49:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:49:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:49:54,417 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:49:54,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:49:54,615 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:49:54,616 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 [2023-08-29 23:49:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:49:54,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:49:54,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:49:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282256398] [2023-08-29 23:49:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282256398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:49:54,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:49:54,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:49:54,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304787137] [2023-08-29 23:49:54,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:49:54,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:49:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:49:54,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:49:54,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:49:54,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 522 [2023-08-29 23:49:54,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 98 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:54,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:49:54,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 522 [2023-08-29 23:49:54,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand