./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:45:48,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:45:48,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:45:48,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:45:48,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:45:48,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:45:48,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:45:48,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:45:48,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:45:48,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:45:48,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:45:48,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:45:48,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:45:48,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:45:48,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:45:48,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:45:48,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:45:48,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:45:48,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:45:48,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:45:48,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:45:48,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:45:48,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:45:48,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:45:48,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:45:48,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:45:48,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:45:48,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:45:48,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:45:48,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:45:48,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:45:48,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:45:48,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:45:48,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:45:48,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:45:48,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:45:48,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:45:48,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:45:48,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:45:48,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:45:48,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:45:48,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:45:48,377 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:45:48,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:45:48,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:45:48,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:45:48,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:45:48,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:45:48,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:45:48,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:45:48,380 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:45:48,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:45:48,381 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:45:48,381 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:45:48,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:45:48,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:45:48,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:45:48,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:45:48,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:45:48,382 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:45:48,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:45:48,382 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:45:48,382 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:45:48,382 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:45:48,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:45:48,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:45:48,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:45:48,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:45:48,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:45:48,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:45:48,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:45:48,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:45:48,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:45:48,384 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:45:48,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:45:48,384 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:45:48,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:45:48,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:45:48,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:45:48,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:45:48,623 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:45:48,624 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:45:48,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-09-01 02:45:49,566 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:45:49,700 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:45:49,701 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-09-01 02:45:49,706 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b19ab79e/841432bddbae4497ba5d82282de78f4f/FLAG53bee6c84 [2023-09-01 02:45:49,714 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b19ab79e/841432bddbae4497ba5d82282de78f4f [2023-09-01 02:45:49,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:45:49,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:45:49,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:49,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:45:49,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:45:49,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbc300c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49, skipping insertion in model container [2023-09-01 02:45:49,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:45:49,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:45:49,900 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] [2023-09-01 02:45:49,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:49,921 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:45:49,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7daccb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49, skipping insertion in model container [2023-09-01 02:45:49,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:49,924 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:45:49,925 INFO L158 Benchmark]: Toolchain (without parser) took 207.62ms. Allocated memory is still 88.1MB. Free memory was 68.6MB in the beginning and 58.2MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:45:49,926 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:45:49,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.19ms. Allocated memory is still 88.1MB. Free memory was 68.3MB in the beginning and 58.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:45:49,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.19ms. Allocated memory is still 88.1MB. Free memory was 68.3MB in the beginning and 58.2MB in the end (delta: 10.1MB). 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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:45:51,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:45:51,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:45:51,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:45:51,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:45:51,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:45:51,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:45:51,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:45:51,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:45:51,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:45:51,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:45:51,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:45:51,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:45:51,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:45:51,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:45:51,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:45:51,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:45:51,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:45:51,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:45:51,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:45:51,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:45:51,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:45:51,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:45:51,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:45:51,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:45:51,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:45:51,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:45:51,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:45:51,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:45:51,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:45:51,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:45:51,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:45:51,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:45:51,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:45:51,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:45:51,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:45:51,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:45:51,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:45:51,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:45:51,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:45:51,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:45:51,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:45:51,376 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:45:51,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:45:51,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:45:51,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:45:51,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:45:51,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:45:51,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:45:51,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:45:51,379 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:45:51,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:45:51,380 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:45:51,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:45:51,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:45:51,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:45:51,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:45:51,380 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:45:51,381 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:45:51,382 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:45:51,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:45:51,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:45:51,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:45:51,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:45:51,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:45:51,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:45:51,383 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:45:51,383 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:45:51,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:45:51,383 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:45:51,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:45:51,384 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:45:51,384 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:45:51,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:45:51,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:45:51,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:45:51,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:45:51,636 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:45:51,637 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:45:51,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-09-01 02:45:52,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:45:52,831 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:45:52,833 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-09-01 02:45:52,838 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cb2f8df/65f58b1355c74e488ab9a5cf5f64021b/FLAG11c7337b8 [2023-09-01 02:45:52,847 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cb2f8df/65f58b1355c74e488ab9a5cf5f64021b [2023-09-01 02:45:52,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:45:52,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:45:52,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:52,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:45:52,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:45:52,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:52" (1/1) ... [2023-09-01 02:45:52,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f40e60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:52, skipping insertion in model container [2023-09-01 02:45:52,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:52" (1/1) ... [2023-09-01 02:45:52,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:45:52,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:45:52,999 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] [2023-09-01 02:45:53,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:53,034 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:45:53,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:45:53,063 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] [2023-09-01 02:45:53,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:53,087 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:45:53,116 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] [2023-09-01 02:45:53,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:53,127 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:45:53,128 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:45:53,132 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:45:53,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53 WrapperNode [2023-09-01 02:45:53,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:53,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:45:53,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:45:53,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:45:53,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,194 INFO L138 Inliner]: procedures = 27, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 317 [2023-09-01 02:45:53,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:45:53,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:45:53,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:45:53,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:45:53,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:45:53,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:45:53,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:45:53,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:45:53,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (1/1) ... [2023-09-01 02:45:53,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:45:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:45:53,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:45:53,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:45:53,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:45:53,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:45:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:45:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:45:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:45:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:45:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:45:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:45:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:45:53,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:45:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:45:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:45:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:45:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:45:53,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:45:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:45:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:45:53,291 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:45:53,387 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:45:53,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:45:53,906 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:45:54,043 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:45:54,043 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:45:54,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:45:54 BoogieIcfgContainer [2023-09-01 02:45:54,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:45:54,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:45:54,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:45:54,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:45:54,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:45:52" (1/3) ... [2023-09-01 02:45:54,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c90e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:45:54, skipping insertion in model container [2023-09-01 02:45:54,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:53" (2/3) ... [2023-09-01 02:45:54,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c90e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:45:54, skipping insertion in model container [2023-09-01 02:45:54,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:45:54" (3/3) ... [2023-09-01 02:45:54,052 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-09-01 02:45:54,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:45:54,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-09-01 02:45:54,064 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:45:54,144 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:45:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 292 transitions, 608 flow [2023-09-01 02:45:54,277 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-09-01 02:45:54,277 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:45:54,282 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. [2023-09-01 02:45:54,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 292 transitions, 608 flow [2023-09-01 02:45:54,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 285 transitions, 588 flow [2023-09-01 02:45:54,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:45:54,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 285 transitions, 588 flow [2023-09-01 02:45:54,300 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 285 transitions, 588 flow [2023-09-01 02:45:54,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 285 transitions, 588 flow [2023-09-01 02:45:54,348 INFO L130 PetriNetUnfolder]: 25/285 cut-off events. [2023-09-01 02:45:54,349 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:45:54,350 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. [2023-09-01 02:45:54,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 4960 [2023-09-01 02:46:22,520 INFO L134 LiptonReduction]: Checked pairs total: 12467 [2023-09-01 02:46:22,520 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-09-01 02:46:22,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:46:22,533 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;@d2f506a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:46:22,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-09-01 02:46:22,535 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:46:22,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:46:22,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:22,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:46:22,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:46:22,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash 42588, now seen corresponding path program 1 times [2023-09-01 02:46:22,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627127097] [2023-09-01 02:46:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:22,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:22,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:22,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:22,553 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 (2)] Waiting until timeout for monitored process [2023-09-01 02:46:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:46:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:22,784 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:46:22,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:46:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:22,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:22,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:22,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627127097] [2023-09-01 02:46:22,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627127097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:22,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:22,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:46:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929950360] [2023-09-01 02:46:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:22,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:46:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:46:22,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:46:22,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 611 [2023-09-01 02:46:22,995 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) [2023-09-01 02:46:22,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:22,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 611 [2023-09-01 02:46:22,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:24,431 INFO L130 PetriNetUnfolder]: 10396/14199 cut-off events. [2023-09-01 02:46:24,431 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-09-01 02:46:24,458 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. [2023-09-01 02:46:24,525 INFO L137 encePairwiseOnDemand]: 604/611 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 02:46:24,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 274 flow [2023-09-01 02:46:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2023-09-01 02:46:24,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42116748499727225 [2023-09-01 02:46:24,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2023-09-01 02:46:24,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2023-09-01 02:46:24,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:24,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2023-09-01 02:46:24,548 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) [2023-09-01 02:46:24,554 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) [2023-09-01 02:46:24,555 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) [2023-09-01 02:46:24,557 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 158 flow. Second operand 3 states and 772 transitions. [2023-09-01 02:46:24,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 274 flow [2023-09-01 02:46:24,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:46:24,563 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 136 flow [2023-09-01 02:46:24,565 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} [2023-09-01 02:46:24,568 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-09-01 02:46:24,568 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 136 flow [2023-09-01 02:46:24,569 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) [2023-09-01 02:46:24,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:24,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:46:24,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:24,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:24,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:46:24,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:24,775 INFO L85 PathProgramCache]: Analyzing trace with hash 42589, now seen corresponding path program 1 times [2023-09-01 02:46:24,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:24,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750674227] [2023-09-01 02:46:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:24,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:24,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:24,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:46:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:46:24,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:24,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:46:24,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:46:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:24,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:24,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:24,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750674227] [2023-09-01 02:46:24,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750674227] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:24,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:24,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:46:24,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622326794] [2023-09-01 02:46:24,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:24,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:46:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:24,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:46:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:46:25,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 611 [2023-09-01 02:46:25,117 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) [2023-09-01 02:46:25,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:25,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 611 [2023-09-01 02:46:25,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:27,516 INFO L130 PetriNetUnfolder]: 20791/28394 cut-off events. [2023-09-01 02:46:27,517 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-09-01 02:46:27,546 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. [2023-09-01 02:46:27,726 INFO L137 encePairwiseOnDemand]: 602/611 looper letters, 118 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2023-09-01 02:46:27,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 124 transitions, 510 flow [2023-09-01 02:46:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-09-01 02:46:27,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522640480087289 [2023-09-01 02:46:27,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-09-01 02:46:27,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-09-01 02:46:27,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:27,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-09-01 02:46:27,731 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) [2023-09-01 02:46:27,734 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) [2023-09-01 02:46:27,734 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) [2023-09-01 02:46:27,735 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 136 flow. Second operand 3 states and 829 transitions. [2023-09-01 02:46:27,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 124 transitions, 510 flow [2023-09-01 02:46:27,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 124 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:27,738 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 185 flow [2023-09-01 02:46:27,738 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} [2023-09-01 02:46:27,739 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-09-01 02:46:27,739 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 185 flow [2023-09-01 02:46:27,740 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) [2023-09-01 02:46:27,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:27,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:46:27,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:27,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:27,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:46:27,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1323974, now seen corresponding path program 1 times [2023-09-01 02:46:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:27,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435913617] [2023-09-01 02:46:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:27,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:27,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:46:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:46:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:28,086 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:46:28,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:46:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:46:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:28,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:28,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435913617] [2023-09-01 02:46:28,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435913617] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:46:28,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:46:28,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:46:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705035116] [2023-09-01 02:46:28,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:46:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:46:28,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:46:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:46:29,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 611 [2023-09-01 02:46:29,020 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) [2023-09-01 02:46:29,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:29,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 611 [2023-09-01 02:46:29,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:33,707 INFO L130 PetriNetUnfolder]: 31196/42605 cut-off events. [2023-09-01 02:46:33,708 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-09-01 02:46:33,740 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. [2023-09-01 02:46:33,864 INFO L137 encePairwiseOnDemand]: 599/611 looper letters, 173 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2023-09-01 02:46:33,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 200 transitions, 901 flow [2023-09-01 02:46:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:46:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:46:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1523 transitions. [2023-09-01 02:46:33,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154391707583197 [2023-09-01 02:46:33,868 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1523 transitions. [2023-09-01 02:46:33,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1523 transitions. [2023-09-01 02:46:33,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:33,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1523 transitions. [2023-09-01 02:46:33,871 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) [2023-09-01 02:46:33,876 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) [2023-09-01 02:46:33,877 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) [2023-09-01 02:46:33,879 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 185 flow. Second operand 6 states and 1523 transitions. [2023-09-01 02:46:33,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 200 transitions, 901 flow [2023-09-01 02:46:33,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 200 transitions, 877 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:46:33,883 INFO L231 Difference]: Finished difference. Result has 72 places, 90 transitions, 377 flow [2023-09-01 02:46:33,883 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} [2023-09-01 02:46:33,884 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-09-01 02:46:33,884 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 90 transitions, 377 flow [2023-09-01 02:46:33,885 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) [2023-09-01 02:46:33,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:33,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:46:33,899 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 (4)] Ended with exit code 0 [2023-09-01 02:46:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:34,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:46:34,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 41089879, now seen corresponding path program 1 times [2023-09-01 02:46:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213336845] [2023-09-01 02:46:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:34,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:34,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:34,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:34,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:46:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:46:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:34,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:34,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:34,276 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:46:34,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 02:46:34,301 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:46:34,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:46:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:34,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:46:34,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:46:34,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:34,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:46:34,420 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:46:34,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:46:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:34,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:34,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:34,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213336845] [2023-09-01 02:46:34,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213336845] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:34,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:34,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:46:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109642273] [2023-09-01 02:46:34,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:34,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:46:34,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:46:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:46:34,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 611 [2023-09-01 02:46:34,917 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) [2023-09-01 02:46:34,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:34,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 611 [2023-09-01 02:46:34,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:37,570 INFO L130 PetriNetUnfolder]: 23898/33000 cut-off events. [2023-09-01 02:46:37,570 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-09-01 02:46:37,598 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. [2023-09-01 02:46:37,686 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-09-01 02:46:37,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 529 flow [2023-09-01 02:46:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-09-01 02:46:37,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228041462084015 [2023-09-01 02:46:37,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-09-01 02:46:37,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-09-01 02:46:37,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:37,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-09-01 02:46:37,690 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) [2023-09-01 02:46:37,693 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) [2023-09-01 02:46:37,693 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) [2023-09-01 02:46:37,694 INFO L175 Difference]: Start difference. First operand has 72 places, 90 transitions, 377 flow. Second operand 3 states and 775 transitions. [2023-09-01 02:46:37,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 529 flow [2023-09-01 02:46:37,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 499 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:37,696 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 329 flow [2023-09-01 02:46:37,696 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} [2023-09-01 02:46:37,697 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2023-09-01 02:46:37,697 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 329 flow [2023-09-01 02:46:37,697 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) [2023-09-01 02:46:37,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:37,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:46:37,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:37,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:37,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:46:37,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 41089878, now seen corresponding path program 1 times [2023-09-01 02:46:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:37,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234457570] [2023-09-01 02:46:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:37,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:37,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:37,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:37,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:46:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:37,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:46:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:38,056 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:46:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 02:46:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:38,307 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 02:46:38,308 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 [2023-09-01 02:46:40,513 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 02:46:40,513 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 [2023-09-01 02:46:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:42,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:42,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234457570] [2023-09-01 02:46:42,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234457570] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:42,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:42,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:46:42,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319908895] [2023-09-01 02:46:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:42,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:46:42,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:46:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2023-09-01 02:46:45,457 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] [2023-09-01 02:46:48,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:46:50,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:46:52,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:46:54,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:46:55,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 611 [2023-09-01 02:46:55,286 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) [2023-09-01 02:46:55,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:55,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 611 [2023-09-01 02:46:55,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:57,546 INFO L130 PetriNetUnfolder]: 16600/23395 cut-off events. [2023-09-01 02:46:57,547 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-09-01 02:46:57,571 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. [2023-09-01 02:46:57,638 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 02:46:57,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 473 flow [2023-09-01 02:46:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-09-01 02:46:57,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37424986361156576 [2023-09-01 02:46:57,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-09-01 02:46:57,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-09-01 02:46:57,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:57,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-09-01 02:46:57,643 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) [2023-09-01 02:46:57,645 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) [2023-09-01 02:46:57,646 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) [2023-09-01 02:46:57,646 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 329 flow. Second operand 3 states and 686 transitions. [2023-09-01 02:46:57,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 473 flow [2023-09-01 02:46:57,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:57,648 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 310 flow [2023-09-01 02:46:57,648 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} [2023-09-01 02:46:57,650 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-09-01 02:46:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 310 flow [2023-09-01 02:46:57,650 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) [2023-09-01 02:46:57,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:57,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:46:57,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:57,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:57,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:46:57,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash 832697774, now seen corresponding path program 1 times [2023-09-01 02:46:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342469083] [2023-09-01 02:46:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:57,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:57,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:57,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:57,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:46:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:46:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:57,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:58,005 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:46:58,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 02:46:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:58,082 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 [2023-09-01 02:46:58,117 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:46:58,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:46:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:58,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:58,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:58,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342469083] [2023-09-01 02:46:58,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342469083] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:58,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:58,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:46:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420002616] [2023-09-01 02:46:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:46:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:46:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:46:58,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 611 [2023-09-01 02:46:58,323 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) [2023-09-01 02:46:58,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:58,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 611 [2023-09-01 02:46:58,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:00,134 INFO L130 PetriNetUnfolder]: 16174/22741 cut-off events. [2023-09-01 02:47:00,134 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-09-01 02:47:00,165 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. [2023-09-01 02:47:00,221 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 79 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-09-01 02:47:00,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 466 flow [2023-09-01 02:47:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 783 transitions. [2023-09-01 02:47:00,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42716857610474634 [2023-09-01 02:47:00,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 783 transitions. [2023-09-01 02:47:00,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 783 transitions. [2023-09-01 02:47:00,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:00,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 783 transitions. [2023-09-01 02:47:00,225 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) [2023-09-01 02:47:00,227 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) [2023-09-01 02:47:00,228 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) [2023-09-01 02:47:00,228 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 310 flow. Second operand 3 states and 783 transitions. [2023-09-01 02:47:00,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 466 flow [2023-09-01 02:47:00,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:00,229 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 307 flow [2023-09-01 02:47:00,229 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} [2023-09-01 02:47:00,230 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-09-01 02:47:00,230 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 307 flow [2023-09-01 02:47:00,230 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) [2023-09-01 02:47:00,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:00,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:47:00,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-09-01 02:47:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:00,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:00,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 832697773, now seen corresponding path program 1 times [2023-09-01 02:47:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:00,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689300973] [2023-09-01 02:47:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:00,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:00,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:00,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:47:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:47:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:00,598 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:47:00,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:47:00,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:47:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:00,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:47:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:00,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:47:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:00,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:00,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689300973] [2023-09-01 02:47:00,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689300973] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:00,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:00,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935241046] [2023-09-01 02:47:00,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:00,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:00,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 611 [2023-09-01 02:47:00,866 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) [2023-09-01 02:47:00,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:00,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 611 [2023-09-01 02:47:00,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:02,767 INFO L130 PetriNetUnfolder]: 15748/22087 cut-off events. [2023-09-01 02:47:02,767 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-09-01 02:47:02,786 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. [2023-09-01 02:47:02,831 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-09-01 02:47:02,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 459 flow [2023-09-01 02:47:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 781 transitions. [2023-09-01 02:47:02,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260774686306601 [2023-09-01 02:47:02,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 781 transitions. [2023-09-01 02:47:02,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 781 transitions. [2023-09-01 02:47:02,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:02,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 781 transitions. [2023-09-01 02:47:02,835 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) [2023-09-01 02:47:02,837 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) [2023-09-01 02:47:02,837 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) [2023-09-01 02:47:02,837 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 307 flow. Second operand 3 states and 781 transitions. [2023-09-01 02:47:02,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 459 flow [2023-09-01 02:47:02,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:02,839 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 304 flow [2023-09-01 02:47:02,839 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} [2023-09-01 02:47:02,840 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2023-09-01 02:47:02,840 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 304 flow [2023-09-01 02:47:02,840 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) [2023-09-01 02:47:02,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:02,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:47:02,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:03,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:03,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 791492765, now seen corresponding path program 2 times [2023-09-01 02:47:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:03,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125367617] [2023-09-01 02:47:03,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:47:03,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:03,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:03,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:47:03,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:47:03,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:47:03,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:47:03,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:03,196 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:47:03,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:47:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:03,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:47:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:03,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125367617] [2023-09-01 02:47:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125367617] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:47:03,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:47:03,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:47:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498963561] [2023-09-01 02:47:03,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:47:03,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:47:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:47:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:47:07,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 611 [2023-09-01 02:47:07,615 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) [2023-09-01 02:47:07,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:07,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 611 [2023-09-01 02:47:07,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:10,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:12,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:13,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:15,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:17,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:19,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:21,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:24,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:26,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:37,219 INFO L130 PetriNetUnfolder]: 52474/73582 cut-off events. [2023-09-01 02:47:37,219 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-09-01 02:47:37,370 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. [2023-09-01 02:47:37,577 INFO L137 encePairwiseOnDemand]: 601/611 looper letters, 479 selfloop transitions, 53 changer transitions 0/532 dead transitions. [2023-09-01 02:47:37,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 532 transitions, 2498 flow [2023-09-01 02:47:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:47:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:47:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3878 transitions. [2023-09-01 02:47:37,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231314784506274 [2023-09-01 02:47:37,586 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3878 transitions. [2023-09-01 02:47:37,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3878 transitions. [2023-09-01 02:47:37,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:37,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3878 transitions. [2023-09-01 02:47:37,592 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) [2023-09-01 02:47:37,600 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) [2023-09-01 02:47:37,602 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) [2023-09-01 02:47:37,602 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 304 flow. Second operand 15 states and 3878 transitions. [2023-09-01 02:47:37,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 532 transitions, 2498 flow [2023-09-01 02:47:37,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 532 transitions, 2497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:37,608 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 701 flow [2023-09-01 02:47:37,608 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} [2023-09-01 02:47:37,609 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2023-09-01 02:47:37,610 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 701 flow [2023-09-01 02:47:37,610 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) [2023-09-01 02:47:37,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:37,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:47:37,622 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 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:37,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:37,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:37,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 43826958, now seen corresponding path program 1 times [2023-09-01 02:47:37,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:37,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935274584] [2023-09-01 02:47:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:37,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:37,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:37,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:37,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:47:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:47:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:37,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:37,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:37,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935274584] [2023-09-01 02:47:37,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935274584] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:37,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:37,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565958910] [2023-09-01 02:47:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:38,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 611 [2023-09-01 02:47:38,037 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) [2023-09-01 02:47:38,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:38,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 611 [2023-09-01 02:47:38,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:44,778 INFO L130 PetriNetUnfolder]: 53636/75620 cut-off events. [2023-09-01 02:47:44,778 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-09-01 02:47:44,984 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. [2023-09-01 02:47:45,165 INFO L137 encePairwiseOnDemand]: 597/611 looper letters, 164 selfloop transitions, 3 changer transitions 1/168 dead transitions. [2023-09-01 02:47:45,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 168 transitions, 1451 flow [2023-09-01 02:47:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:47:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:47:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-09-01 02:47:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42266775777414073 [2023-09-01 02:47:45,167 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-09-01 02:47:45,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-09-01 02:47:45,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:45,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-09-01 02:47:45,178 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) [2023-09-01 02:47:45,181 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) [2023-09-01 02:47:45,181 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) [2023-09-01 02:47:45,182 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 701 flow. Second operand 4 states and 1033 transitions. [2023-09-01 02:47:45,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 168 transitions, 1451 flow [2023-09-01 02:47:45,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1290 flow, removed 39 selfloop flow, removed 4 redundant places. [2023-09-01 02:47:45,187 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 628 flow [2023-09-01 02:47:45,187 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} [2023-09-01 02:47:45,201 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2023-09-01 02:47:45,201 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 628 flow [2023-09-01 02:47:45,201 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) [2023-09-01 02:47:45,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:45,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:47:45,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:45,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:45,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1358673432, now seen corresponding path program 1 times [2023-09-01 02:47:45,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:45,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892915078] [2023-09-01 02:47:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:45,404 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:45,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:47:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:47:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:45,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:45,566 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:47:45,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:47:45,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 02:47:45,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:45,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:47:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:45,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:47:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:45,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:45,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892915078] [2023-09-01 02:47:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892915078] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:45,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:45,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:47:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180498570] [2023-09-01 02:47:45,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:45,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:47:45,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:47:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:47:45,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 611 [2023-09-01 02:47:45,849 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) [2023-09-01 02:47:45,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:45,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 611 [2023-09-01 02:47:45,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:52,486 INFO L130 PetriNetUnfolder]: 51436/72340 cut-off events. [2023-09-01 02:47:52,486 INFO L131 PetriNetUnfolder]: For 4310/4310 co-relation queries the response was YES. [2023-09-01 02:47:52,740 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. [2023-09-01 02:47:52,925 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-09-01 02:47:52,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 840 flow [2023-09-01 02:47:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-09-01 02:47:52,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217130387343153 [2023-09-01 02:47:52,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-09-01 02:47:52,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-09-01 02:47:52,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:52,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-09-01 02:47:52,929 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) [2023-09-01 02:47:52,931 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) [2023-09-01 02:47:52,931 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) [2023-09-01 02:47:52,931 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 628 flow. Second operand 3 states and 773 transitions. [2023-09-01 02:47:52,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 840 flow [2023-09-01 02:47:52,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 834 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:52,936 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 620 flow [2023-09-01 02:47:52,937 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} [2023-09-01 02:47:52,937 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 20 predicate places. [2023-09-01 02:47:52,937 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 620 flow [2023-09-01 02:47:52,937 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) [2023-09-01 02:47:52,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:52,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:47:52,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:53,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:53,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:47:53,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1358673431, now seen corresponding path program 1 times [2023-09-01 02:47:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:53,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927306330] [2023-09-01 02:47:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:53,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:53,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:53,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:47:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:53,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:47:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:53,284 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 02:47:53,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 02:47:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:53,314 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 [2023-09-01 02:47:53,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:53,334 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 [2023-09-01 02:47:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:53,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:53,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:53,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927306330] [2023-09-01 02:47:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927306330] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:53,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:53,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:47:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565945966] [2023-09-01 02:47:53,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:53,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:47:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:47:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:47:53,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 611 [2023-09-01 02:47:53,726 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) [2023-09-01 02:47:53,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:53,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 611 [2023-09-01 02:47:53,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:00,139 INFO L130 PetriNetUnfolder]: 49236/69060 cut-off events. [2023-09-01 02:48:00,139 INFO L131 PetriNetUnfolder]: For 4342/4342 co-relation queries the response was YES. [2023-09-01 02:48:00,370 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. [2023-09-01 02:48:00,545 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-09-01 02:48:00,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 828 flow [2023-09-01 02:48:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2023-09-01 02:48:00,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41407528641571195 [2023-09-01 02:48:00,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2023-09-01 02:48:00,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2023-09-01 02:48:00,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:00,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2023-09-01 02:48:00,549 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) [2023-09-01 02:48:00,551 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) [2023-09-01 02:48:00,551 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) [2023-09-01 02:48:00,551 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 620 flow. Second operand 3 states and 759 transitions. [2023-09-01 02:48:00,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 828 flow [2023-09-01 02:48:00,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 106 transitions, 827 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:00,556 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 617 flow [2023-09-01 02:48:00,556 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} [2023-09-01 02:48:00,556 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 19 predicate places. [2023-09-01 02:48:00,557 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 617 flow [2023-09-01 02:48:00,557 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) [2023-09-01 02:48:00,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:00,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:00,581 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 (12)] Ended with exit code 0 [2023-09-01 02:48:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:00,765 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:48:00,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1692805877, now seen corresponding path program 1 times [2023-09-01 02:48:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:00,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367742112] [2023-09-01 02:48:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:00,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:00,767 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:48:00,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:48:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:00,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:48:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:00,916 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:48:00,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:48:00,938 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:48:00,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:48:00,952 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:48:00,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:48:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:48:00,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:00,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:00,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367742112] [2023-09-01 02:48:00,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367742112] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:00,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:00,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:48:00,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801599242] [2023-09-01 02:48:00,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:00,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:00,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:48:01,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 611 [2023-09-01 02:48:01,097 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) [2023-09-01 02:48:01,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:01,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 611 [2023-09-01 02:48:01,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:05,887 INFO L130 PetriNetUnfolder]: 37076/52020 cut-off events. [2023-09-01 02:48:05,887 INFO L131 PetriNetUnfolder]: For 3802/3802 co-relation queries the response was YES. [2023-09-01 02:48:06,056 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. [2023-09-01 02:48:06,185 INFO L137 encePairwiseOnDemand]: 606/611 looper letters, 91 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2023-09-01 02:48:06,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 811 flow [2023-09-01 02:48:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:48:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:48:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 972 transitions. [2023-09-01 02:48:06,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397708674304419 [2023-09-01 02:48:06,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 972 transitions. [2023-09-01 02:48:06,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 972 transitions. [2023-09-01 02:48:06,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:06,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 972 transitions. [2023-09-01 02:48:06,189 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) [2023-09-01 02:48:06,191 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) [2023-09-01 02:48:06,191 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) [2023-09-01 02:48:06,191 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 617 flow. Second operand 4 states and 972 transitions. [2023-09-01 02:48:06,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 811 flow [2023-09-01 02:48:06,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 810 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:06,196 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 628 flow [2023-09-01 02:48:06,196 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} [2023-09-01 02:48:06,196 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2023-09-01 02:48:06,197 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 628 flow [2023-09-01 02:48:06,197 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) [2023-09-01 02:48:06,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:06,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:06,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 02:48:06,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:06,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:48:06,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1692805959, now seen corresponding path program 1 times [2023-09-01 02:48:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:06,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256166590] [2023-09-01 02:48:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:06,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:06,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:48:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:48:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 02:48:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:06,623 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:48:06,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:48:06,700 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:48:06,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:48:06,812 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:48:06,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:48:06,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:48:06,858 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:48:06,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:48:06,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:48:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:06,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:48:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:12,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256166590] [2023-09-01 02:48:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256166590] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:48:12,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:48:12,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2023-09-01 02:48:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197384529] [2023-09-01 02:48:12,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:48:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 02:48:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 02:48:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-09-01 02:48:18,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:21,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:25,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:27,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:31,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:34,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:37,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:41,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:44,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:50,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:55,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:48:58,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:01,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:04,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:07,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:09,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:12,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:12,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 611 [2023-09-01 02:49:12,777 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) [2023-09-01 02:49:12,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:12,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 611 [2023-09-01 02:49:12,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:26,818 WARN L222 SmtUtils]: Spent 13.84s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:49:36,760 WARN L222 SmtUtils]: Spent 9.55s 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) [2023-09-01 02:49:38,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:44,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:47,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:49:56,076 WARN L222 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:49:59,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:50:01,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:50:11,692 WARN L222 SmtUtils]: Spent 9.51s 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) [2023-09-01 02:50:27,735 WARN L222 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:50:40,226 INFO L130 PetriNetUnfolder]: 88240/123136 cut-off events. [2023-09-01 02:50:40,226 INFO L131 PetriNetUnfolder]: For 9910/9910 co-relation queries the response was YES. [2023-09-01 02:50:40,782 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 821280 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. [2023-09-01 02:50:41,110 INFO L137 encePairwiseOnDemand]: 598/611 looper letters, 257 selfloop transitions, 59 changer transitions 0/316 dead transitions. [2023-09-01 02:50:41,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 316 transitions, 2346 flow [2023-09-01 02:50:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 02:50:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 02:50:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3427 transitions. [2023-09-01 02:50:41,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32993164532588815 [2023-09-01 02:50:41,117 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3427 transitions. [2023-09-01 02:50:41,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3427 transitions. [2023-09-01 02:50:41,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:41,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3427 transitions. [2023-09-01 02:50:41,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 201.58823529411765) internal successors, (3427), 17 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:41,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 611.0) internal successors, (10998), 18 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:41,129 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 611.0) internal successors, (10998), 18 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:41,129 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 628 flow. Second operand 17 states and 3427 transitions. [2023-09-01 02:50:41,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 316 transitions, 2346 flow [2023-09-01 02:50:41,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 316 transitions, 2333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:50:41,138 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 1238 flow [2023-09-01 02:50:41,138 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=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1238, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2023-09-01 02:50:41,139 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 39 predicate places. [2023-09-01 02:50:41,139 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 1238 flow [2023-09-01 02:50:41,139 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) [2023-09-01 02:50:41,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:41,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:41,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:41,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:41,346 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:50:41,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash 937378372, now seen corresponding path program 1 times [2023-09-01 02:50:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:41,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285260422] [2023-09-01 02:50:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:41,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:41,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:50:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:50:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:50:41,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:41,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285260422] [2023-09-01 02:50:41,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285260422] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:41,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:41,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:50:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857159850] [2023-09-01 02:50:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:41,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:41,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 611 [2023-09-01 02:50:41,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 1238 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) [2023-09-01 02:50:41,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:41,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 611 [2023-09-01 02:50:41,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:11,798 INFO L130 PetriNetUnfolder]: 205740/286296 cut-off events. [2023-09-01 02:51:11,798 INFO L131 PetriNetUnfolder]: For 98719/98719 co-relation queries the response was YES. [2023-09-01 02:51:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687414 conditions, 286296 events. 205740/286296 cut-off events. For 98719/98719 co-relation queries the response was YES. Maximal size of possible extension queue 7915. Compared 2139862 event pairs, 35160 based on Foata normal form. 5760/163676 useless extension candidates. Maximal degree in co-relation 687374. Up to 101521 conditions per place. [2023-09-01 02:51:14,247 INFO L137 encePairwiseOnDemand]: 602/611 looper letters, 221 selfloop transitions, 10 changer transitions 0/231 dead transitions. [2023-09-01 02:51:14,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 231 transitions, 1981 flow [2023-09-01 02:51:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:51:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:51:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1350 transitions. [2023-09-01 02:51:14,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189852700491 [2023-09-01 02:51:14,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1350 transitions. [2023-09-01 02:51:14,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1350 transitions. [2023-09-01 02:51:14,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:14,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1350 transitions. [2023-09-01 02:51:14,252 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) [2023-09-01 02:51:14,254 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) [2023-09-01 02:51:14,254 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) [2023-09-01 02:51:14,254 INFO L175 Difference]: Start difference. First operand has 109 places, 146 transitions, 1238 flow. Second operand 5 states and 1350 transitions. [2023-09-01 02:51:14,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 231 transitions, 1981 flow [2023-09-01 02:51:14,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 231 transitions, 1964 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 02:51:14,404 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1329 flow [2023-09-01 02:51:14,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1329, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2023-09-01 02:51:14,404 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 46 predicate places. [2023-09-01 02:51:14,404 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1329 flow [2023-09-01 02:51:14,405 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) [2023-09-01 02:51:14,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:14,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:14,413 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 [2023-09-01 02:51:14,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:14,605 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-09-01 02:51:14,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1004917343, now seen corresponding path program 1 times [2023-09-01 02:51:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:14,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886565728] [2023-09-01 02:51:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:14,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:14,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:14,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:14,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:51:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:51:14,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:51:14,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:51:14,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886565728] [2023-09-01 02:51:14,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886565728] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:51:14,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:51:14,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:51:14,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371635238] [2023-09-01 02:51:14,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:51:14,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:51:14,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:51:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:51:14,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 611 [2023-09-01 02:51:14,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1329 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) [2023-09-01 02:51:14,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:14,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 611 [2023-09-01 02:51:14,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand