./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.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-ring-nondet.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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --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 23:54:31,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:54:31,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:54:31,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:54:31,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:54:31,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:54:31,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:54:31,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:54:31,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:54:31,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:54:31,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:54:31,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:54:31,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:54:31,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:54:31,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:54:31,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:54:31,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:54:31,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:54:31,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:54:31,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:54:31,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:54:31,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:54:31,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:54:31,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:54:31,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:54:31,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:54:31,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:54:31,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:54:31,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:54:31,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:54:31,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:54:31,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:54:31,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:54:31,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:54:31,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:54:31,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:54:31,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:54:31,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:54:31,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:54:31,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:54:31,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:54:31,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:54:31,486 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:54:31,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:54:31,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:54:31,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:54:31,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:54:31,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:54:31,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:54:31,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:54:31,489 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:54:31,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:54:31,490 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:54:31,490 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:54:31,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:54:31,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:54:31,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:54:31,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:54:31,491 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:54:31,491 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:54:31,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:54:31,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:54:31,492 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:54:31,492 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:54:31,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:54:31,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:54:31,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:54:31,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:31,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:54:31,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:54:31,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:54:31,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:54:31,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:54:31,494 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:54:31,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:54:31,494 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:54:31,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:54:31,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:54:31,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:54:31,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:54:31,800 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:54:31,800 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:54:31,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-29 23:54:32,987 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:54:33,202 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:54:33,203 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-29 23:54:33,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fbdf6c8/b1f8229772d04ed6830933fe2616abad/FLAG8abf40bfe [2023-08-29 23:54:33,219 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fbdf6c8/b1f8229772d04ed6830933fe2616abad [2023-08-29 23:54:33,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:54:33,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:54:33,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:33,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:54:33,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:54:33,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:33" (1/1) ... [2023-08-29 23:54:33,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dfb0810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:33, skipping insertion in model container [2023-08-29 23:54:33,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:33" (1/1) ... [2023-08-29 23:54:33,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:54:33,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:33,380 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-ring-nondet.wvr.c[4085,4098] [2023-08-29 23:54:33,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:33,394 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 23:54:33,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c917ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:33, skipping insertion in model container [2023-08-29 23:54:33,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:33,396 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:54:33,397 INFO L158 Benchmark]: Toolchain (without parser) took 174.59ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 40.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:54:33,398 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 34.9MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:54:33,399 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.88ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 40.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:54:33,400 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 34.9MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.88ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 40.6MB 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: 165]: 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-ring-nondet.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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --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 23:54:34,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:54:35,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:54:35,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:54:35,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:54:35,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:54:35,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:54:35,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:54:35,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:54:35,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:54:35,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:54:35,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:54:35,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:54:35,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:54:35,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:54:35,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:54:35,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:54:35,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:54:35,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:54:35,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:54:35,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:54:35,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:54:35,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:54:35,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:54:35,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:54:35,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:54:35,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:54:35,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:54:35,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:54:35,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:54:35,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:54:35,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:54:35,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:54:35,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:54:35,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:54:35,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:54:35,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:54:35,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:54:35,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:54:35,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:54:35,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:54:35,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:54:35,130 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:54:35,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:54:35,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:54:35,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:54:35,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:54:35,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:54:35,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:54:35,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:54:35,133 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:54:35,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:54:35,134 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:54:35,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:54:35,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:54:35,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:54:35,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:54:35,135 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:54:35,135 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:54:35,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:54:35,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:54:35,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:54:35,136 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:54:35,136 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:54:35,136 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:54:35,137 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:54:35,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:54:35,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:54:35,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:54:35,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:35,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:54:35,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:54:35,138 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:54:35,138 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:54:35,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:54:35,138 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:54:35,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:54:35,139 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:54:35,139 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:54:35,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:54:35,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:54:35,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:54:35,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:54:35,456 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:54:35,456 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:54:35,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-29 23:54:36,624 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:54:36,867 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:54:36,868 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-29 23:54:36,874 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8133fb91c/476da379d59742e7a22199a3fe1fdb8c/FLAGb8a8361b3 [2023-08-29 23:54:36,889 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8133fb91c/476da379d59742e7a22199a3fe1fdb8c [2023-08-29 23:54:36,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:54:36,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:54:36,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:36,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:54:36,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:54:36,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:36" (1/1) ... [2023-08-29 23:54:36,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16957da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:36, skipping insertion in model container [2023-08-29 23:54:36,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:36" (1/1) ... [2023-08-29 23:54:36,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:54:36,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:37,068 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-ring-nondet.wvr.c[4085,4098] [2023-08-29 23:54:37,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:37,094 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:54:37,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:37,116 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-ring-nondet.wvr.c[4085,4098] [2023-08-29 23:54:37,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:37,126 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:54:37,162 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-ring-nondet.wvr.c[4085,4098] [2023-08-29 23:54:37,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:37,186 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:54:37,188 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:54:37,193 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:54:37,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37 WrapperNode [2023-08-29 23:54:37,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:37,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:54:37,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:54:37,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:54:37,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,278 INFO L138 Inliner]: procedures = 27, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 317 [2023-08-29 23:54:37,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:54:37,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:54:37,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:54:37,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:54:37,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:54:37,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:54:37,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:54:37,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:54:37,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (1/1) ... [2023-08-29 23:54:37,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:54:37,390 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 23:54:37,413 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 23:54:37,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:54:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:54:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:54:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:54:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:54:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:54:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:54:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:54:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:54:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:54:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:54:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:54:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:54:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:54:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:54:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:54:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:54:37,431 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 23:54:37,563 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:54:37,565 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:54:38,251 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:54:38,451 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:54:38,451 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:54:38,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:54:38 BoogieIcfgContainer [2023-08-29 23:54:38,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:54:38,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:54:38,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:54:38,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:54:38,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:54:36" (1/3) ... [2023-08-29 23:54:38,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f266516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:54:38, skipping insertion in model container [2023-08-29 23:54:38,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:37" (2/3) ... [2023-08-29 23:54:38,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f266516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:54:38, skipping insertion in model container [2023-08-29 23:54:38,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:54:38" (3/3) ... [2023-08-29 23:54:38,462 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-08-29 23:54:38,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:54:38,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-29 23:54:38,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:54:38,592 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:54:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 292 transitions, 608 flow [2023-08-29 23:54:38,768 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-08-29 23:54:38,768 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:54:38,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 289 events. 25/289 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 238. Up to 4 conditions per place. [2023-08-29 23:54:38,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 292 transitions, 608 flow [2023-08-29 23:54:38,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 285 transitions, 588 flow [2023-08-29 23:54:38,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:54:38,806 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 285 transitions, 588 flow [2023-08-29 23:54:38,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 285 transitions, 588 flow [2023-08-29 23:54:38,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 285 transitions, 588 flow [2023-08-29 23:54:38,850 INFO L130 PetriNetUnfolder]: 25/285 cut-off events. [2023-08-29 23:54:38,850 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:54:38,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 285 events. 25/285 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 368 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 238. Up to 4 conditions per place. [2023-08-29 23:54:38,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 4960 [2023-08-29 23:55:07,877 INFO L134 LiptonReduction]: Checked pairs total: 12467 [2023-08-29 23:55:07,878 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-29 23:55:07,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:55:07,896 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;@4f1df87d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:55:07,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-29 23:55:07,903 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:55:07,903 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:55:07,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:07,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:55:07,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:07,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 42588, now seen corresponding path program 1 times [2023-08-29 23:55:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307692707] [2023-08-29 23:55:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:07,926 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 23:55:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:07,927 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 23:55:07,933 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 23:55:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:08,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:55:08,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:08,184 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:55:08,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:55:08,215 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 23:55:08,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:08,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307692707] [2023-08-29 23:55:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307692707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:08,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:08,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:08,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441672767] [2023-08-29 23:55:08,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:08,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:08,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 611 [2023-08-29 23:55:08,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 158 flow. Second operand has 3 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 23:55:08,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:08,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 611 [2023-08-29 23:55:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:10,563 INFO L130 PetriNetUnfolder]: 10396/14199 cut-off events. [2023-08-29 23:55:10,563 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-08-29 23:55:10,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28694 conditions, 14199 events. 10396/14199 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 73739 event pairs, 8633 based on Foata normal form. 0/5247 useless extension candidates. Maximal degree in co-relation 26920. Up to 14199 conditions per place. [2023-08-29 23:55:10,664 INFO L137 encePairwiseOnDemand]: 604/611 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-29 23:55:10,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 274 flow [2023-08-29 23:55:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2023-08-29 23:55:10,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42116748499727225 [2023-08-29 23:55:10,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2023-08-29 23:55:10,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2023-08-29 23:55:10,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:10,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2023-08-29 23:55:10,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 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 23:55:10,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:10,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:10,711 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 158 flow. Second operand 3 states and 772 transitions. [2023-08-29 23:55:10,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 274 flow [2023-08-29 23:55:10,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:55:10,721 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 136 flow [2023-08-29 23:55:10,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=136, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2023-08-29 23:55:10,731 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-29 23:55:10,732 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 136 flow [2023-08-29 23:55:10,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 23:55:10,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:10,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:55:10,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:10,945 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 23:55:10,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:10,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 42589, now seen corresponding path program 1 times [2023-08-29 23:55:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:10,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035233524] [2023-08-29 23:55:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:10,947 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 23:55:10,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:10,954 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 23:55:10,957 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 23:55:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:11,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:55:11,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:11,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:11,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:11,174 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 23:55:11,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:11,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035233524] [2023-08-29 23:55:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035233524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:11,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:11,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662380483] [2023-08-29 23:55:11,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:11,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:11,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:11,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 611 [2023-08-29 23:55:11,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 136 flow. Second operand has 3 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 23:55:11,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:11,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 611 [2023-08-29 23:55:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:14,282 INFO L130 PetriNetUnfolder]: 20791/28394 cut-off events. [2023-08-29 23:55:14,282 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-29 23:55:14,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57010 conditions, 28394 events. 20791/28394 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 160316 event pairs, 17266 based on Foata normal form. 0/10493 useless extension candidates. Maximal degree in co-relation 57004. Up to 14200 conditions per place. [2023-08-29 23:55:14,408 INFO L137 encePairwiseOnDemand]: 602/611 looper letters, 118 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2023-08-29 23:55:14,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 124 transitions, 510 flow [2023-08-29 23:55:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-08-29 23:55:14,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522640480087289 [2023-08-29 23:55:14,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-08-29 23:55:14,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-08-29 23:55:14,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:14,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-08-29 23:55:14,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 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 23:55:14,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:14,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:14,419 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 136 flow. Second operand 3 states and 829 transitions. [2023-08-29 23:55:14,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 124 transitions, 510 flow [2023-08-29 23:55:14,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 124 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:14,423 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 185 flow [2023-08-29 23:55:14,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2023-08-29 23:55:14,425 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-08-29 23:55:14,425 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 185 flow [2023-08-29 23:55:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 23:55:14,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:14,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:55:14,439 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 (3)] Ended with exit code 0 [2023-08-29 23:55:14,636 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 23:55:14,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:14,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1323974, now seen corresponding path program 1 times [2023-08-29 23:55:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:14,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195411481] [2023-08-29 23:55:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:14,638 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 23:55:14,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:14,643 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 23:55:14,645 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 23:55:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:55:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:14,820 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:14,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:14,888 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 23:55:14,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:15,042 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 23:55:15,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:15,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195411481] [2023-08-29 23:55:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195411481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:15,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:15,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:55:15,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455680071] [2023-08-29 23:55:15,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:15,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:55:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:15,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:55:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:55:15,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 611 [2023-08-29 23:55:15,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 23:55:15,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:15,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 611 [2023-08-29 23:55:15,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:20,829 INFO L130 PetriNetUnfolder]: 31196/42605 cut-off events. [2023-08-29 23:55:20,829 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-29 23:55:20,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85583 conditions, 42605 events. 31196/42605 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 2298. Compared 251888 event pairs, 25899 based on Foata normal form. 0/15760 useless extension candidates. Maximal degree in co-relation 85574. Up to 14201 conditions per place. [2023-08-29 23:55:21,039 INFO L137 encePairwiseOnDemand]: 599/611 looper letters, 173 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2023-08-29 23:55:21,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 200 transitions, 901 flow [2023-08-29 23:55:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:55:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:55:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1523 transitions. [2023-08-29 23:55:21,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154391707583197 [2023-08-29 23:55:21,043 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1523 transitions. [2023-08-29 23:55:21,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1523 transitions. [2023-08-29 23:55:21,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:21,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1523 transitions. [2023-08-29 23:55:21,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 253.83333333333334) internal successors, (1523), 6 states have internal predecessors, (1523), 0 states have call successors, (0), 0 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 23:55:21,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 611.0) internal successors, (4277), 7 states have internal predecessors, (4277), 0 states have call successors, (0), 0 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 23:55:21,058 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 611.0) internal successors, (4277), 7 states have internal predecessors, (4277), 0 states have call successors, (0), 0 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 23:55:21,058 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 185 flow. Second operand 6 states and 1523 transitions. [2023-08-29 23:55:21,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 200 transitions, 901 flow [2023-08-29 23:55:21,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 200 transitions, 877 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:55:21,064 INFO L231 Difference]: Finished difference. Result has 72 places, 90 transitions, 377 flow [2023-08-29 23:55:21,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=72, PETRI_TRANSITIONS=90} [2023-08-29 23:55:21,066 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-29 23:55:21,066 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 90 transitions, 377 flow [2023-08-29 23:55:21,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 23:55:21,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:21,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:55:21,077 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 23:55:21,277 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 23:55:21,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:21,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash 41089879, now seen corresponding path program 1 times [2023-08-29 23:55:21,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:21,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661951827] [2023-08-29 23:55:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:21,279 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 23:55:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:21,280 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 23:55:21,282 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 23:55:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:21,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:55:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:21,472 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 23:55:21,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 23:55:21,499 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:55:21,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:55:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:21,554 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 23:55:21,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:55:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:21,630 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 23:55:21,647 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:55:21,647 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 23:55:21,690 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 23:55:21,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:21,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661951827] [2023-08-29 23:55:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661951827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:21,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:21,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:55:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540078089] [2023-08-29 23:55:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:55:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:55:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:55:22,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 611 [2023-08-29 23:55:22,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 90 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 23:55:22,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:22,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 611 [2023-08-29 23:55:22,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:25,293 INFO L130 PetriNetUnfolder]: 23898/33000 cut-off events. [2023-08-29 23:55:25,293 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-29 23:55:25,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66435 conditions, 33000 events. 23898/33000 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 194485 event pairs, 19755 based on Foata normal form. 0/13073 useless extension candidates. Maximal degree in co-relation 66422. Up to 33000 conditions per place. [2023-08-29 23:55:25,434 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-29 23:55:25,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 529 flow [2023-08-29 23:55:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-08-29 23:55:25,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228041462084015 [2023-08-29 23:55:25,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-08-29 23:55:25,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-08-29 23:55:25,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:25,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-08-29 23:55:25,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 23:55:25,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:25,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:25,444 INFO L175 Difference]: Start difference. First operand has 72 places, 90 transitions, 377 flow. Second operand 3 states and 775 transitions. [2023-08-29 23:55:25,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 529 flow [2023-08-29 23:55:25,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 499 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:25,447 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 329 flow [2023-08-29 23:55:25,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-08-29 23:55:25,448 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2023-08-29 23:55:25,448 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 329 flow [2023-08-29 23:55:25,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 23:55:25,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:25,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:55:25,456 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 (5)] Ended with exit code 0 [2023-08-29 23:55:25,653 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 23:55:25,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:25,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:25,653 INFO L85 PathProgramCache]: Analyzing trace with hash 41089878, now seen corresponding path program 1 times [2023-08-29 23:55:25,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:25,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16099167] [2023-08-29 23:55:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:25,654 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 23:55:25,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:25,655 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 23:55:25,656 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 23:55:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:55:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:25,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:25,842 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 23:55:25,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 23:55:26,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:26,143 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:55:26,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:55:28,409 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 23:55:28,410 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-29 23:55:30,848 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 23:55:30,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:30,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16099167] [2023-08-29 23:55:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16099167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:30,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:55:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247056318] [2023-08-29 23:55:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:55:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:55:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2023-08-29 23:55:33,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:55:35,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:55:37,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:55:40,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:55:42,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:55:43,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 611 [2023-08-29 23:55:43,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 23:55:43,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:43,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 611 [2023-08-29 23:55:43,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:45,514 INFO L130 PetriNetUnfolder]: 16600/23395 cut-off events. [2023-08-29 23:55:45,515 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 23:55:45,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47199 conditions, 23395 events. 16600/23395 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 136615 event pairs, 13611 based on Foata normal form. 0/10385 useless extension candidates. Maximal degree in co-relation 47185. Up to 23395 conditions per place. [2023-08-29 23:55:45,623 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-29 23:55:45,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 473 flow [2023-08-29 23:55:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-29 23:55:45,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37424986361156576 [2023-08-29 23:55:45,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-29 23:55:45,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-29 23:55:45,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:45,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-29 23:55:45,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 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 23:55:45,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:45,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:45,634 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 329 flow. Second operand 3 states and 686 transitions. [2023-08-29 23:55:45,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 473 flow [2023-08-29 23:55:45,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:45,637 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 310 flow [2023-08-29 23:55:45,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2023-08-29 23:55:45,638 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-29 23:55:45,638 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 310 flow [2023-08-29 23:55:45,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 23:55:45,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:45,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:55:45,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-29 23:55:45,849 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 23:55:45,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:45,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:45,850 INFO L85 PathProgramCache]: Analyzing trace with hash 832697774, now seen corresponding path program 1 times [2023-08-29 23:55:45,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:45,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991895389] [2023-08-29 23:55:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:45,851 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 23:55:45,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:45,852 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 23:55:45,853 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 23:55:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:55:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:45,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:46,018 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 23:55:46,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 23:55:46,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:46,105 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 20 [2023-08-29 23:55:46,145 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:55:46,145 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 23:55:46,182 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 23:55:46,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:46,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:46,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991895389] [2023-08-29 23:55:46,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991895389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:46,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:46,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209842573] [2023-08-29 23:55:46,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:46,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:46,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:46,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 611 [2023-08-29 23:55:46,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 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 23:55:46,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:46,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 611 [2023-08-29 23:55:46,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:48,240 INFO L130 PetriNetUnfolder]: 16174/22741 cut-off events. [2023-08-29 23:55:48,240 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 23:55:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45892 conditions, 22741 events. 16174/22741 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 131503 event pairs, 13242 based on Foata normal form. 0/10226 useless extension candidates. Maximal degree in co-relation 45877. Up to 22741 conditions per place. [2023-08-29 23:55:48,327 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 79 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-29 23:55:48,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 466 flow [2023-08-29 23:55:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 783 transitions. [2023-08-29 23:55:48,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42716857610474634 [2023-08-29 23:55:48,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 783 transitions. [2023-08-29 23:55:48,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 783 transitions. [2023-08-29 23:55:48,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:48,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 783 transitions. [2023-08-29 23:55:48,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 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 23:55:48,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:48,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:48,333 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 310 flow. Second operand 3 states and 783 transitions. [2023-08-29 23:55:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 466 flow [2023-08-29 23:55:48,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:48,335 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 307 flow [2023-08-29 23:55:48,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2023-08-29 23:55:48,336 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-08-29 23:55:48,336 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 307 flow [2023-08-29 23:55:48,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 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 23:55:48,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:48,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:55:48,350 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 23:55:48,548 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 23:55:48,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:48,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash 832697773, now seen corresponding path program 1 times [2023-08-29 23:55:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:48,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556212784] [2023-08-29 23:55:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:48,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:48,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:48,551 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 23:55:48,553 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 23:55:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:55:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:48,723 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:55:48,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 23:55:48,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 23:55:48,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:48,786 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 23:55:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:48,808 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 23:55:48,854 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 23:55:48,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:48,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556212784] [2023-08-29 23:55:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556212784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968974079] [2023-08-29 23:55:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:49,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 611 [2023-08-29 23:55:49,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 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 23:55:49,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:49,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 611 [2023-08-29 23:55:49,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:50,864 INFO L130 PetriNetUnfolder]: 15748/22087 cut-off events. [2023-08-29 23:55:50,864 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 23:55:50,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44585 conditions, 22087 events. 15748/22087 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 127157 event pairs, 12873 based on Foata normal form. 0/10067 useless extension candidates. Maximal degree in co-relation 44569. Up to 22087 conditions per place. [2023-08-29 23:55:50,923 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-29 23:55:50,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 459 flow [2023-08-29 23:55:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 781 transitions. [2023-08-29 23:55:50,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260774686306601 [2023-08-29 23:55:50,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 781 transitions. [2023-08-29 23:55:50,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 781 transitions. [2023-08-29 23:55:50,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:50,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 781 transitions. [2023-08-29 23:55:50,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 23:55:50,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:50,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:55:50,930 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 307 flow. Second operand 3 states and 781 transitions. [2023-08-29 23:55:50,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 459 flow [2023-08-29 23:55:50,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:50,932 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 304 flow [2023-08-29 23:55:50,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-08-29 23:55:50,932 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2023-08-29 23:55:50,933 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 304 flow [2023-08-29 23:55:50,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 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 23:55:50,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:50,933 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:55:50,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:51,136 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 23:55:51,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:51,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash 791492765, now seen corresponding path program 2 times [2023-08-29 23:55:51,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:51,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474077346] [2023-08-29 23:55:51,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:51,138 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 23:55:51,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:51,139 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 23:55:51,140 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 23:55:51,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:55:51,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:55:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:51,317 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:51,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:51,449 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 23:55:51,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:51,962 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 23:55:51,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474077346] [2023-08-29 23:55:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474077346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:51,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:51,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:55:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692561120] [2023-08-29 23:55:51,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:55:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:55:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:55:55,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 611 [2023-08-29 23:55:55,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 304 flow. Second operand has 12 states, 12 states have (on average 223.0) internal successors, (2676), 12 states have internal predecessors, (2676), 0 states have call successors, (0), 0 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 23:55:55,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:55,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 611 [2023-08-29 23:55:55,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:58,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:00,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:01,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:05,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:07,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:13,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:25,277 INFO L130 PetriNetUnfolder]: 52474/73582 cut-off events. [2023-08-29 23:56:25,277 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-08-29 23:56:25,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148419 conditions, 73582 events. 52474/73582 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 2148. Compared 466988 event pairs, 42910 based on Foata normal form. 16/33524 useless extension candidates. Maximal degree in co-relation 148402. Up to 7680 conditions per place. [2023-08-29 23:56:25,570 INFO L137 encePairwiseOnDemand]: 601/611 looper letters, 479 selfloop transitions, 53 changer transitions 0/532 dead transitions. [2023-08-29 23:56:25,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 532 transitions, 2498 flow [2023-08-29 23:56:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:56:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:56:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3878 transitions. [2023-08-29 23:56:25,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231314784506274 [2023-08-29 23:56:25,582 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3878 transitions. [2023-08-29 23:56:25,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3878 transitions. [2023-08-29 23:56:25,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:25,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3878 transitions. [2023-08-29 23:56:25,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 258.53333333333336) internal successors, (3878), 15 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 23:56:25,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 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 23:56:25,605 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 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 23:56:25,605 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 304 flow. Second operand 15 states and 3878 transitions. [2023-08-29 23:56:25,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 532 transitions, 2498 flow [2023-08-29 23:56:25,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 532 transitions, 2497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:25,612 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 701 flow [2023-08-29 23:56:25,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=701, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-08-29 23:56:25,613 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2023-08-29 23:56:25,613 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 701 flow [2023-08-29 23:56:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 223.0) internal successors, (2676), 12 states have internal predecessors, (2676), 0 states have call successors, (0), 0 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 23:56:25,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:25,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:25,629 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 23:56:25,823 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 23:56:25,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:25,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash 43826958, now seen corresponding path program 1 times [2023-08-29 23:56:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352609813] [2023-08-29 23:56:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:25,825 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 23:56:25,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:25,830 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 23:56:25,832 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 23:56:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:56:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:25,966 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 23:56:25,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:25,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:25,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352609813] [2023-08-29 23:56:25,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352609813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:56:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378392280] [2023-08-29 23:56:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:56:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:56:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:56:26,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 611 [2023-08-29 23:56:26,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 701 flow. Second operand has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 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 23:56:26,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:26,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 611 [2023-08-29 23:56:26,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:32,796 INFO L130 PetriNetUnfolder]: 53636/75620 cut-off events. [2023-08-29 23:56:32,796 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-08-29 23:56:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152889 conditions, 75620 events. 53636/75620 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 2303. Compared 489548 event pairs, 43980 based on Foata normal form. 820/35897 useless extension candidates. Maximal degree in co-relation 152861. Up to 73581 conditions per place. [2023-08-29 23:56:33,193 INFO L137 encePairwiseOnDemand]: 597/611 looper letters, 164 selfloop transitions, 3 changer transitions 1/168 dead transitions. [2023-08-29 23:56:33,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 168 transitions, 1451 flow [2023-08-29 23:56:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:56:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:56:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-08-29 23:56:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42266775777414073 [2023-08-29 23:56:33,197 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-08-29 23:56:33,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-08-29 23:56:33,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:33,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-08-29 23:56:33,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 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 23:56:33,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 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 23:56:33,203 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 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 23:56:33,203 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 701 flow. Second operand 4 states and 1033 transitions. [2023-08-29 23:56:33,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 168 transitions, 1451 flow [2023-08-29 23:56:33,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1290 flow, removed 39 selfloop flow, removed 4 redundant places. [2023-08-29 23:56:33,210 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 628 flow [2023-08-29 23:56:33,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=628, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-08-29 23:56:33,210 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2023-08-29 23:56:33,211 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 628 flow [2023-08-29 23:56:33,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 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 23:56:33,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:33,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:33,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:33,419 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 23:56:33,420 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:33,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1358673432, now seen corresponding path program 1 times [2023-08-29 23:56:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:33,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212271295] [2023-08-29 23:56:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:33,421 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 23:56:33,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:33,422 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 23:56:33,423 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 23:56:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:56:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:33,617 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:56:33,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 23:56:33,626 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 23:56:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:33,657 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 23:56:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:33,807 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 23:56:33,875 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 23:56:33,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:33,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:33,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212271295] [2023-08-29 23:56:33,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212271295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:33,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:33,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:56:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798526169] [2023-08-29 23:56:33,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:56:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:56:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:56:34,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 611 [2023-08-29 23:56:34,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 628 flow. Second operand has 5 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 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 23:56:34,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:34,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 611 [2023-08-29 23:56:34,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:40,989 INFO L130 PetriNetUnfolder]: 51436/72340 cut-off events. [2023-08-29 23:56:40,989 INFO L131 PetriNetUnfolder]: For 4310/4310 co-relation queries the response was YES. [2023-08-29 23:56:41,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167673 conditions, 72340 events. 51436/72340 cut-off events. For 4310/4310 co-relation queries the response was YES. Maximal size of possible extension queue 2243. Compared 464040 event pairs, 42150 based on Foata normal form. 0/34250 useless extension candidates. Maximal degree in co-relation 167643. Up to 72340 conditions per place. [2023-08-29 23:56:41,412 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-29 23:56:41,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 840 flow [2023-08-29 23:56:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:56:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:56:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-29 23:56:41,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217130387343153 [2023-08-29 23:56:41,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-29 23:56:41,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-29 23:56:41,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:41,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-29 23:56:41,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 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 23:56:41,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:56:41,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:56:41,420 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 628 flow. Second operand 3 states and 773 transitions. [2023-08-29 23:56:41,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 840 flow [2023-08-29 23:56:41,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 834 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:41,428 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 620 flow [2023-08-29 23:56:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=620, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-08-29 23:56:41,429 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 20 predicate places. [2023-08-29 23:56:41,429 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 620 flow [2023-08-29 23:56:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 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 23:56:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:41,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:41,440 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 23:56:41,639 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 23:56:41,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:41,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1358673431, now seen corresponding path program 1 times [2023-08-29 23:56:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786076634] [2023-08-29 23:56:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:41,641 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 23:56:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:41,642 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 23:56:41,642 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 23:56:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:41,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:56:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:41,818 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:56:41,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 23:56:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:41,856 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 20 [2023-08-29 23:56:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:41,884 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 20 [2023-08-29 23:56:41,968 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 23:56:41,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:41,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:41,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786076634] [2023-08-29 23:56:41,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786076634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:41,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:41,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:56:41,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908956326] [2023-08-29 23:56:41,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:41,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:56:41,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:56:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:56:42,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 611 [2023-08-29 23:56:42,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 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 23:56:42,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:42,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 611 [2023-08-29 23:56:42,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:49,340 INFO L130 PetriNetUnfolder]: 49236/69060 cut-off events. [2023-08-29 23:56:49,341 INFO L131 PetriNetUnfolder]: For 4342/4342 co-relation queries the response was YES. [2023-08-29 23:56:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160031 conditions, 69060 events. 49236/69060 cut-off events. For 4342/4342 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 438710 event pairs, 40320 based on Foata normal form. 0/33420 useless extension candidates. Maximal degree in co-relation 160000. Up to 69060 conditions per place. [2023-08-29 23:56:49,744 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-29 23:56:49,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 828 flow [2023-08-29 23:56:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:56:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:56:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2023-08-29 23:56:49,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41407528641571195 [2023-08-29 23:56:49,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2023-08-29 23:56:49,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2023-08-29 23:56:49,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:49,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2023-08-29 23:56:49,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 23:56:49,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:56:49,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 23:56:49,751 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 620 flow. Second operand 3 states and 759 transitions. [2023-08-29 23:56:49,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 828 flow [2023-08-29 23:56:49,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 106 transitions, 827 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:49,758 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 617 flow [2023-08-29 23:56:49,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=617, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2023-08-29 23:56:49,759 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 19 predicate places. [2023-08-29 23:56:49,759 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 617 flow [2023-08-29 23:56:49,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 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 23:56:49,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:49,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:49,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:49,969 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 23:56:49,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:49,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1692805877, now seen corresponding path program 1 times [2023-08-29 23:56:49,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:49,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951286918] [2023-08-29 23:56:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:49,970 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 23:56:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:49,971 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 23:56:49,979 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 23:56:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:56:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:50,166 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:56:50,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:56:50,202 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:56:50,202 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 23:56:50,223 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:56:50,224 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 23:56:50,237 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 23:56:50,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:50,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:50,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951286918] [2023-08-29 23:56:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951286918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:50,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:50,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:56:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179551848] [2023-08-29 23:56:50,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:50,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:56:50,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:56:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:56:50,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 611 [2023-08-29 23:56:50,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 617 flow. Second operand has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:50,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:50,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 611 [2023-08-29 23:56:50,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:55,599 INFO L130 PetriNetUnfolder]: 37076/52020 cut-off events. [2023-08-29 23:56:55,600 INFO L131 PetriNetUnfolder]: For 3802/3802 co-relation queries the response was YES. [2023-08-29 23:56:55,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118272 conditions, 52020 events. 37076/52020 cut-off events. For 3802/3802 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 317417 event pairs, 29600 based on Foata normal form. 0/27020 useless extension candidates. Maximal degree in co-relation 118240. Up to 52007 conditions per place. [2023-08-29 23:56:55,874 INFO L137 encePairwiseOnDemand]: 606/611 looper letters, 91 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2023-08-29 23:56:55,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 811 flow [2023-08-29 23:56:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:56:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:56:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 972 transitions. [2023-08-29 23:56:55,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397708674304419 [2023-08-29 23:56:55,877 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 972 transitions. [2023-08-29 23:56:55,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 972 transitions. [2023-08-29 23:56:55,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:55,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 972 transitions. [2023-08-29 23:56:55,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 23:56:55,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 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 23:56:55,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 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 23:56:55,883 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 617 flow. Second operand 4 states and 972 transitions. [2023-08-29 23:56:55,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 811 flow [2023-08-29 23:56:55,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 810 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:55,889 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 628 flow [2023-08-29 23:56:55,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=628, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2023-08-29 23:56:55,890 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2023-08-29 23:56:55,890 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 628 flow [2023-08-29 23:56:55,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:55,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:55,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:55,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:56,100 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 23:56:56,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:56,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1692805959, now seen corresponding path program 1 times [2023-08-29 23:56:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:56,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13257747] [2023-08-29 23:56:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:56,101 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 23:56:56,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:56,103 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 23:56:56,111 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 23:56:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-29 23:56:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:56,341 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:56:56,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:56:56,429 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:56:56,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:56:56,575 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:56:56,575 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 23:56:56,582 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 23:56:56,622 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:56:56,623 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 23:56:56,634 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 23:56:56,695 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 23:56:56,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:04,612 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 23:57:04,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13257747] [2023-08-29 23:57:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13257747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:04,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:57:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2023-08-29 23:57:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028633213] [2023-08-29 23:57:04,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:57:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:57:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:57:10,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:12,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:14,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:17,265 WARN L539 Checker$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 23:57:20,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:23,181 WARN L539 Checker$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 23:57:28,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:31,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:33,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:37,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:39,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:41,707 WARN L539 Checker$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 23:57:42,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:45,400 WARN L539 Checker$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 23:57:47,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:50,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:53,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:59,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:03,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:06,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:09,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:11,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 611 [2023-08-29 23:58:11,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 628 flow. Second operand has 11 states, 11 states have (on average 191.45454545454547) internal successors, (2106), 11 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:11,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:11,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 611 [2023-08-29 23:58:11,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:35,731 WARN L222 SmtUtils]: Spent 24.25s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:58:50,679 WARN L222 SmtUtils]: Spent 12.50s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:58:52,807 WARN L539 Checker$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 23:58:56,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:59:07,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:59:22,287 WARN L222 SmtUtils]: Spent 11.11s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:59:36,137 WARN L222 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:59:52,875 INFO L130 PetriNetUnfolder]: 88240/123136 cut-off events. [2023-08-29 23:59:52,875 INFO L131 PetriNetUnfolder]: For 9910/9910 co-relation queries the response was YES. [2023-08-29 23:59:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275956 conditions, 123136 events. 88240/123136 cut-off events. For 9910/9910 co-relation queries the response was YES. Maximal size of possible extension queue 3302. Compared 821286 event pairs, 68740 based on Foata normal form. 0/66536 useless extension candidates. Maximal degree in co-relation 275923. Up to 50081 conditions per place. [2023-08-29 23:59:53,571 INFO L137 encePairwiseOnDemand]: 598/611 looper letters, 247 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2023-08-29 23:59:53,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 295 transitions, 2136 flow [2023-08-29 23:59:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:59:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:59:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3046 transitions. [2023-08-29 23:59:53,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323513366066558 [2023-08-29 23:59:53,579 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3046 transitions. [2023-08-29 23:59:53,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3046 transitions. [2023-08-29 23:59:53,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:53,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3046 transitions. [2023-08-29 23:59:53,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 203.06666666666666) internal successors, (3046), 15 states have internal predecessors, (3046), 0 states have call successors, (0), 0 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 23:59:53,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 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 23:59:53,597 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 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 23:59:53,597 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 628 flow. Second operand 15 states and 3046 transitions. [2023-08-29 23:59:53,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 295 transitions, 2136 flow [2023-08-29 23:59:53,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 295 transitions, 2123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:59:53,610 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1092 flow [2023-08-29 23:59:53,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1092, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2023-08-29 23:59:53,611 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 36 predicate places. [2023-08-29 23:59:53,611 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1092 flow [2023-08-29 23:59:53,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 191.45454545454547) internal successors, (2106), 11 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 23:59:53,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:53,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:53,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:53,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:59:53,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 937378372, now seen corresponding path program 1 times [2023-08-29 23:59:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:53,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62844304] [2023-08-29 23:59:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:53,818 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 23:59:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:53,820 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:59:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:59:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:53,949 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 23:59:53,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:53,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:53,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62844304] [2023-08-29 23:59:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62844304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:53,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:59:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294145425] [2023-08-29 23:59:53,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:53,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:53,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 611 [2023-08-29 23:59:53,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1092 flow. Second operand has 4 states, 4 states have (on average 244.25) internal successors, (977), 4 states have internal predecessors, (977), 0 states have call successors, (0), 0 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 23:59:53,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:53,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 611 [2023-08-29 23:59:53,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:27,926 INFO L130 PetriNetUnfolder]: 205740/286296 cut-off events. [2023-08-30 00:00:27,926 INFO L131 PetriNetUnfolder]: For 98682/98682 co-relation queries the response was YES. [2023-08-30 00:00:29,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687383 conditions, 286296 events. 205740/286296 cut-off events. For 98682/98682 co-relation queries the response was YES. Maximal size of possible extension queue 7894. Compared 2138729 event pairs, 35160 based on Foata normal form. 5760/163676 useless extension candidates. Maximal degree in co-relation 687344. Up to 101521 conditions per place. [2023-08-30 00:00:29,910 INFO L137 encePairwiseOnDemand]: 602/611 looper letters, 210 selfloop transitions, 10 changer transitions 0/220 dead transitions. [2023-08-30 00:00:29,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 220 transitions, 1813 flow [2023-08-30 00:00:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:00:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:00:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1350 transitions. [2023-08-30 00:00:29,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189852700491 [2023-08-30 00:00:29,913 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1350 transitions. [2023-08-30 00:00:29,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1350 transitions. [2023-08-30 00:00:29,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:00:29,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1350 transitions. [2023-08-30 00:00:29,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:29,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 611.0) internal successors, (3666), 6 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:29,918 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 611.0) internal successors, (3666), 6 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:29,918 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1092 flow. Second operand 5 states and 1350 transitions. [2023-08-30 00:00:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 220 transitions, 1813 flow [2023-08-30 00:00:30,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 220 transitions, 1792 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:00:30,284 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1179 flow [2023-08-30 00:00:30,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1179, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2023-08-30 00:00:30,285 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 43 predicate places. [2023-08-30 00:00:30,285 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1179 flow [2023-08-30 00:00:30,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 244.25) internal successors, (977), 4 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:30,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:00:30,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:00:30,292 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 (15)] Ended with exit code 0 [2023-08-30 00:00:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:00:30,486 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 00:00:30,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:00:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1004917343, now seen corresponding path program 1 times [2023-08-30 00:00:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:00:30,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017632711] [2023-08-30 00:00:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:00:30,487 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 [2023-08-30 00:00:30,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:00:30,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:00:30,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:00:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:00:30,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:00:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:00:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:00:30,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:00:30,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:00:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017632711] [2023-08-30 00:00:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017632711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:00:30,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:00:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:00:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55805370] [2023-08-30 00:00:30,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:00:30,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:00:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:00:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:00:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:00:30,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 611 [2023-08-30 00:00:30,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1179 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:30,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:00:30,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 611 [2023-08-30 00:00:30,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand