./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-more-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:57:13,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:57:13,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:57:13,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:57:13,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:57:13,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:57:13,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:57:13,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:57:13,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:57:13,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:57:13,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:57:13,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:57:13,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:57:13,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:57:13,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:57:13,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:57:13,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:57:13,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:57:13,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:57:13,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:57:13,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:57:13,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:57:13,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:57:13,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:57:13,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:57:13,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:57:13,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:57:13,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:57:13,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:57:13,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:57:13,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:57:13,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:57:13,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:57:13,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:57:13,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:57:13,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:57:13,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:57:13,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:57:13,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:57:13,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:57:13,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:57:13,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:57:13,350 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:57:13,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:57:13,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:57:13,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:57:13,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:57:13,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:57:13,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:57:13,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:57:13,354 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:57:13,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:57:13,355 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:57:13,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:57:13,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:57:13,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:57:13,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:57:13,356 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:57:13,356 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:57:13,357 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:57:13,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:57:13,357 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:57:13,357 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:57:13,357 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:57:13,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:57:13,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:57:13,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:57:13,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:57:13,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:57:13,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:57:13,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:57:13,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:57:13,359 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:57:13,359 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:57:13,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:57:13,360 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:57:13,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:57:13,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:57:13,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:57:13,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:57:13,698 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:57:13,699 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:57:13,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-30 06:57:15,012 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:57:15,254 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:57:15,255 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-30 06:57:15,260 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cad2673/b353cd4a7b0542468bf807fc245cee46/FLAG0c3ac9f9b [2023-08-30 06:57:15,274 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cad2673/b353cd4a7b0542468bf807fc245cee46 [2023-08-30 06:57:15,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:57:15,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:57:15,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:57:15,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:57:15,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:57:15,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:57:15" (1/1) ... [2023-08-30 06:57:15,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b498356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:15, skipping insertion in model container [2023-08-30 06:57:15,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:57:15" (1/1) ... [2023-08-30 06:57:15,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:57:15,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:57:15,444 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-more-queue-add-3-nl.wvr.c[3615,3628] [2023-08-30 06:57:15,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:57:15,463 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:57:15,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49ae312a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:15, skipping insertion in model container [2023-08-30 06:57:15,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:57:15,464 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:57:15,466 INFO L158 Benchmark]: Toolchain (without parser) took 187.62ms. Allocated memory is still 77.6MB. Free memory was 55.1MB in the beginning and 45.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:57:15,466 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory is still 33.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:57:15,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.73ms. Allocated memory is still 77.6MB. Free memory was 54.8MB in the beginning and 45.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:57:15,468 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory is still 33.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.73ms. Allocated memory is still 77.6MB. Free memory was 54.8MB in the beginning and 45.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 144]: 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-more-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:57:17,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:57:17,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:57:17,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:57:17,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:57:17,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:57:17,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:57:17,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:57:17,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:57:17,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:57:17,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:57:17,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:57:17,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:57:17,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:57:17,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:57:17,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:57:17,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:57:17,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:57:17,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:57:17,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:57:17,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:57:17,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:57:17,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:57:17,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:57:17,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:57:17,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:57:17,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:57:17,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:57:17,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:57:17,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:57:17,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:57:17,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:57:17,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:57:17,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:57:17,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:57:17,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:57:17,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:57:17,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:57:17,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:57:17,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:57:17,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:57:17,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:57:17,325 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:57:17,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:57:17,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:57:17,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:57:17,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:57:17,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:57:17,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:57:17,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:57:17,329 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:57:17,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:57:17,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:57:17,330 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:57:17,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:57:17,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:57:17,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:57:17,331 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:57:17,331 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:57:17,331 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:57:17,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:57:17,331 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:57:17,332 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:57:17,332 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:57:17,332 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:57:17,332 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:57:17,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:57:17,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:57:17,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:57:17,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:57:17,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:57:17,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:57:17,334 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:57:17,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:57:17,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:57:17,334 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:57:17,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:57:17,335 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:57:17,335 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:57:17,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:57:17,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:57:17,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:57:17,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:57:17,630 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:57:17,631 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:57:17,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-30 06:57:18,850 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:57:19,057 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:57:19,057 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-30 06:57:19,063 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb267ee2/14ea508e16d0446681e96274274a9c9d/FLAG323140b5f [2023-08-30 06:57:19,077 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb267ee2/14ea508e16d0446681e96274274a9c9d [2023-08-30 06:57:19,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:57:19,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:57:19,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:57:19,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:57:19,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:57:19,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28fda4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19, skipping insertion in model container [2023-08-30 06:57:19,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:57:19,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:57:19,255 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-more-queue-add-3-nl.wvr.c[3615,3628] [2023-08-30 06:57:19,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:57:19,276 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:57:19,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:57:19,296 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-more-queue-add-3-nl.wvr.c[3615,3628] [2023-08-30 06:57:19,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:57:19,315 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:57:19,347 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-more-queue-add-3-nl.wvr.c[3615,3628] [2023-08-30 06:57:19,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:57:19,374 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:57:19,378 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:57:19,384 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:57:19,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19 WrapperNode [2023-08-30 06:57:19,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:57:19,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:57:19,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:57:19,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:57:19,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,460 INFO L138 Inliner]: procedures = 28, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 258 [2023-08-30 06:57:19,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:57:19,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:57:19,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:57:19,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:57:19,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:57:19,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:57:19,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:57:19,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:57:19,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (1/1) ... [2023-08-30 06:57:19,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:57:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:57:19,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:57:19,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:57:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:57:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:57:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:57:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:57:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:57:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:57:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:57:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:57:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:57:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:57:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:57:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:57:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:57:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:57:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:57:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:57:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:57:19,609 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:57:19,736 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:57:19,738 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:57:20,264 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:57:20,421 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:57:20,421 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 06:57:20,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:57:20 BoogieIcfgContainer [2023-08-30 06:57:20,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:57:20,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:57:20,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:57:20,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:57:20,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:57:19" (1/3) ... [2023-08-30 06:57:20,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c261e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:57:20, skipping insertion in model container [2023-08-30 06:57:20,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:57:19" (2/3) ... [2023-08-30 06:57:20,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c261e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:57:20, skipping insertion in model container [2023-08-30 06:57:20,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:57:20" (3/3) ... [2023-08-30 06:57:20,430 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-08-30 06:57:20,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:57:20,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 06:57:20,446 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:57:20,554 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:57:20,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 237 transitions, 498 flow [2023-08-30 06:57:20,706 INFO L130 PetriNetUnfolder]: 18/234 cut-off events. [2023-08-30 06:57:20,706 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:57:20,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 234 events. 18/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 253 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 185. Up to 3 conditions per place. [2023-08-30 06:57:20,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 237 transitions, 498 flow [2023-08-30 06:57:20,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 230 transitions, 478 flow [2023-08-30 06:57:20,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:57:20,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 230 transitions, 478 flow [2023-08-30 06:57:20,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 230 transitions, 478 flow [2023-08-30 06:57:20,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 230 transitions, 478 flow [2023-08-30 06:57:20,805 INFO L130 PetriNetUnfolder]: 18/230 cut-off events. [2023-08-30 06:57:20,806 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:57:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 230 events. 18/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 185. Up to 3 conditions per place. [2023-08-30 06:57:20,811 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-30 06:57:46,037 INFO L134 LiptonReduction]: Checked pairs total: 4901 [2023-08-30 06:57:46,038 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-30 06:57:46,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:57:46,055 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;@4f4d4c62, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:57:46,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-30 06:57:46,058 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:57:46,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:57:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:46,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:57:46,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:57:46,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 34096, now seen corresponding path program 1 times [2023-08-30 06:57:46,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:46,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842232401] [2023-08-30 06:57:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:46,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:46,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:46,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:46,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:57:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:57:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:46,353 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:57:46,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:57:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:46,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:57:46,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:46,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842232401] [2023-08-30 06:57:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842232401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:57:46,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:57:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:57:46,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048589067] [2023-08-30 06:57:46,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:57:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:57:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:57:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:57:46,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-08-30 06:57:46,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:46,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:46,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-08-30 06:57:46,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:47,681 INFO L130 PetriNetUnfolder]: 4871/6432 cut-off events. [2023-08-30 06:57:47,682 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2023-08-30 06:57:47,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13042 conditions, 6432 events. 4871/6432 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 30330 event pairs, 3250 based on Foata normal form. 0/1974 useless extension candidates. Maximal degree in co-relation 11925. Up to 6431 conditions per place. [2023-08-30 06:57:47,724 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 49 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 06:57:47,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 220 flow [2023-08-30 06:57:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:57:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:57:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-30 06:57:47,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432712215320911 [2023-08-30 06:57:47,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-30 06:57:47,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-30 06:57:47,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:47,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-30 06:57:47,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:47,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:47,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:47,757 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 627 transitions. [2023-08-30 06:57:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 220 flow [2023-08-30 06:57:47,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:57:47,766 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-08-30 06:57:47,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 06:57:47,770 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 06:57:47,771 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-08-30 06:57:47,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:47,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:47,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:57:47,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 06:57:47,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:47,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:57:47,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 34095, now seen corresponding path program 1 times [2023-08-30 06:57:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394836074] [2023-08-30 06:57:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:47,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:47,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:47,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:57:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:57:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:48,168 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:57:48,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:57:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:48,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:57:48,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394836074] [2023-08-30 06:57:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394836074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:57:48,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:57:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:57:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71579598] [2023-08-30 06:57:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:57:48,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:57:48,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:57:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:57:48,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-08-30 06:57:48,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:48,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:48,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-08-30 06:57:48,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:50,259 INFO L130 PetriNetUnfolder]: 9741/12861 cut-off events. [2023-08-30 06:57:50,260 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-08-30 06:57:50,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25852 conditions, 12861 events. 9741/12861 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 68067 event pairs, 6500 based on Foata normal form. 0/3950 useless extension candidates. Maximal degree in co-relation 25846. Up to 6432 conditions per place. [2023-08-30 06:57:50,332 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 93 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-08-30 06:57:50,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 98 transitions, 404 flow [2023-08-30 06:57:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:57:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:57:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-30 06:57:50,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2023-08-30 06:57:50,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-30 06:57:50,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-30 06:57:50,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:50,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-30 06:57:50,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:50,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:50,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:50,342 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 672 transitions. [2023-08-30 06:57:50,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 98 transitions, 404 flow [2023-08-30 06:57:50,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:57:50,345 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-08-30 06:57:50,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 06:57:50,346 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-30 06:57:50,346 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-08-30 06:57:50,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:50,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:50,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:57:50,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:57:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:50,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:57:50,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1061569, now seen corresponding path program 1 times [2023-08-30 06:57:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139984097] [2023-08-30 06:57:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:50,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:50,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:50,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:57:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:57:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:50,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:50,719 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:57:50,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 06:57:50,868 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:57:50,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:57:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:50,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:57:50,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139984097] [2023-08-30 06:57:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139984097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:57:50,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:57:50,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:57:50,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50282966] [2023-08-30 06:57:50,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:57:50,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:57:50,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:50,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:57:50,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:57:51,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 483 [2023-08-30 06:57:51,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:51,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:51,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 483 [2023-08-30 06:57:51,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:52,465 INFO L130 PetriNetUnfolder]: 7661/10219 cut-off events. [2023-08-30 06:57:52,465 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-08-30 06:57:52,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20582 conditions, 10219 events. 7661/10219 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 53621 event pairs, 5082 based on Foata normal form. 0/3357 useless extension candidates. Maximal degree in co-relation 20573. Up to 10217 conditions per place. [2023-08-30 06:57:52,518 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 50 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 06:57:52,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 239 flow [2023-08-30 06:57:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:57:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:57:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-30 06:57:52,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361628709454796 [2023-08-30 06:57:52,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-30 06:57:52,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-30 06:57:52,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:52,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-30 06:57:52,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:52,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:52,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:52,532 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 632 transitions. [2023-08-30 06:57:52,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 239 flow [2023-08-30 06:57:52,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:57:52,535 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-08-30 06:57:52,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-30 06:57:52,536 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-08-30 06:57:52,536 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-08-30 06:57:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:52,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:52,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:57:52,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:57:52,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:52,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:57:52,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1061568, now seen corresponding path program 1 times [2023-08-30 06:57:52,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:52,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833461219] [2023-08-30 06:57:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:52,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:52,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:52,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:52,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:57:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:52,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:57:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:52,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:52,932 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:57:52,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:57:52,952 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:57:52,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:57:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:53,006 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:57:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:53,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:57:53,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833461219] [2023-08-30 06:57:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833461219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:57:53,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:57:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:57:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094415630] [2023-08-30 06:57:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:57:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:57:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:57:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:57:53,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 483 [2023-08-30 06:57:53,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:53,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:53,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 483 [2023-08-30 06:57:53,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:54,118 INFO L130 PetriNetUnfolder]: 5581/7577 cut-off events. [2023-08-30 06:57:54,118 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-08-30 06:57:54,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15295 conditions, 7577 events. 5581/7577 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 39182 event pairs, 3664 based on Foata normal form. 0/2761 useless extension candidates. Maximal degree in co-relation 15286. Up to 7575 conditions per place. [2023-08-30 06:57:54,154 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 06:57:54,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 225 flow [2023-08-30 06:57:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:57:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:57:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 06:57:54,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43685300207039335 [2023-08-30 06:57:54,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 06:57:54,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 06:57:54,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:54,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 06:57:54,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:54,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:54,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:54,162 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 3 states and 633 transitions. [2023-08-30 06:57:54,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 225 flow [2023-08-30 06:57:54,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:57:54,164 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 128 flow [2023-08-30 06:57:54,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-30 06:57:54,165 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 06:57:54,165 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 128 flow [2023-08-30 06:57:54,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:54,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:54,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:57:54,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 06:57:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:54,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:57:54,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1060443, now seen corresponding path program 1 times [2023-08-30 06:57:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:54,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816703350] [2023-08-30 06:57:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:54,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:54,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:57:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:54,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:57:54,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:54,552 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:57:54,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:57:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:57:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:54,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:54,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816703350] [2023-08-30 06:57:54,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816703350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:57:54,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:57:54,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:57:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178672587] [2023-08-30 06:57:54,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:57:54,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:57:54,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:57:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:57:55,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 483 [2023-08-30 06:57:55,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:55,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:55,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 483 [2023-08-30 06:57:55,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:57,589 INFO L130 PetriNetUnfolder]: 8375/11372 cut-off events. [2023-08-30 06:57:57,589 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-08-30 06:57:57,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22958 conditions, 11372 events. 8375/11372 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 61929 event pairs, 5496 based on Foata normal form. 0/4153 useless extension candidates. Maximal degree in co-relation 22948. Up to 3789 conditions per place. [2023-08-30 06:57:57,650 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 125 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2023-08-30 06:57:57,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 141 transitions, 620 flow [2023-08-30 06:57:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:57:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:57:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1232 transitions. [2023-08-30 06:57:57,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-08-30 06:57:57,655 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1232 transitions. [2023-08-30 06:57:57,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1232 transitions. [2023-08-30 06:57:57,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:57,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1232 transitions. [2023-08-30 06:57:57,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.33333333333334) internal successors, (1232), 6 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:57,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:57,666 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:57,667 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 128 flow. Second operand 6 states and 1232 transitions. [2023-08-30 06:57:57,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 141 transitions, 620 flow [2023-08-30 06:57:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 141 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:57:57,671 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 240 flow [2023-08-30 06:57:57,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-30 06:57:57,674 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 06:57:57,675 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 240 flow [2023-08-30 06:57:57,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:57,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:57,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:57:57,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:57:57,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:57,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:57:57,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1020194256, now seen corresponding path program 1 times [2023-08-30 06:57:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146055569] [2023-08-30 06:57:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:57,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:57,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:57,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:57,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:57:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:57:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:58,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:57:58,068 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:57:58,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 06:57:58,396 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:57:58,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:57:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:58,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:57:58,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:58,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146055569] [2023-08-30 06:57:58,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146055569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:57:58,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:57:58,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:57:58,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578488929] [2023-08-30 06:57:58,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:57:58,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:57:58,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:58,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:57:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:57:58,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 483 [2023-08-30 06:57:58,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:58,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:58,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 483 [2023-08-30 06:57:58,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:59,873 INFO L130 PetriNetUnfolder]: 8102/10958 cut-off events. [2023-08-30 06:57:59,874 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-30 06:57:59,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22175 conditions, 10958 events. 8102/10958 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 59965 event pairs, 5280 based on Foata normal form. 0/4057 useless extension candidates. Maximal degree in co-relation 22160. Up to 10955 conditions per place. [2023-08-30 06:57:59,923 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 06:57:59,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 352 flow [2023-08-30 06:57:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:57:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:57:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-30 06:57:59,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334023464458247 [2023-08-30 06:57:59,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-30 06:57:59,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-30 06:57:59,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:59,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-30 06:57:59,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:59,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:59,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:59,931 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 240 flow. Second operand 3 states and 628 transitions. [2023-08-30 06:57:59,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 352 flow [2023-08-30 06:57:59,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 333 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:57:59,934 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-08-30 06:57:59,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-30 06:57:59,935 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-30 06:57:59,935 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-08-30 06:57:59,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:59,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:59,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:57:59,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:58:00,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:00,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:58:00,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1020194258, now seen corresponding path program 1 times [2023-08-30 06:58:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:00,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568997891] [2023-08-30 06:58:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:58:00,146 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 [2023-08-30 06:58:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:00,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:58:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:58:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:58:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:58:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:58:00,332 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 06:58:00,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 06:58:00,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 06:58:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:58:00,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:58:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:00,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:58:00,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568997891] [2023-08-30 06:58:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568997891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:58:00,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:58:00,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:58:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496696460] [2023-08-30 06:58:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:58:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:58:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:58:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:58:00,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 483 [2023-08-30 06:58:00,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:00,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:00,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 483 [2023-08-30 06:58:00,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:01,574 INFO L130 PetriNetUnfolder]: 7829/10544 cut-off events. [2023-08-30 06:58:01,574 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-08-30 06:58:01,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21338 conditions, 10544 events. 7829/10544 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 57459 event pairs, 5064 based on Foata normal form. 0/3961 useless extension candidates. Maximal degree in co-relation 21322. Up to 10541 conditions per place. [2023-08-30 06:58:01,612 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 55 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 06:58:01,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 327 flow [2023-08-30 06:58:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:58:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:58:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-30 06:58:01,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43409247757073843 [2023-08-30 06:58:01,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-30 06:58:01,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-30 06:58:01,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:01,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-30 06:58:01,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:01,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:01,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:01,620 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 629 transitions. [2023-08-30 06:58:01,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 327 flow [2023-08-30 06:58:01,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:58:01,623 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-08-30 06:58:01,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-30 06:58:01,623 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-30 06:58:01,623 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-08-30 06:58:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:01,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:01,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:58:01,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 06:58:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:01,829 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:58:01,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1561243861, now seen corresponding path program 1 times [2023-08-30 06:58:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:01,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907303942] [2023-08-30 06:58:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:58:01,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:01,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:01,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:58:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:58:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:58:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:01,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:58:01,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907303942] [2023-08-30 06:58:01,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907303942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:58:01,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:58:01,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:58:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811653183] [2023-08-30 06:58:01,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:58:01,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:58:01,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:58:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:58:02,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 06:58:02,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:02,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:02,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 06:58:02,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:03,130 INFO L130 PetriNetUnfolder]: 7906/10723 cut-off events. [2023-08-30 06:58:03,131 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 06:58:03,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 10723 events. 7906/10723 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 58458 event pairs, 5127 based on Foata normal form. 129/4224 useless extension candidates. Maximal degree in co-relation 21713. Up to 10540 conditions per place. [2023-08-30 06:58:03,170 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 75 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2023-08-30 06:58:03,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 463 flow [2023-08-30 06:58:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:58:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:58:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-08-30 06:58:03,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-08-30 06:58:03,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-08-30 06:58:03,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-08-30 06:58:03,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:03,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-08-30 06:58:03,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:03,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:03,180 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:03,180 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 4 states and 840 transitions. [2023-08-30 06:58:03,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 463 flow [2023-08-30 06:58:03,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:58:03,183 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 244 flow [2023-08-30 06:58:03,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-08-30 06:58:03,185 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-30 06:58:03,186 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 244 flow [2023-08-30 06:58:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:03,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:03,187 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:58:03,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:58:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:03,397 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:58:03,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1530359855, now seen corresponding path program 2 times [2023-08-30 06:58:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:03,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728490235] [2023-08-30 06:58:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:58:03,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:03,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:03,399 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:03,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:58:03,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:58:03,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:58:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:58:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:03,567 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:58:03,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:58:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:03,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:58:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:04,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728490235] [2023-08-30 06:58:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728490235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:58:04,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:58:04,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:58:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182989574] [2023-08-30 06:58:04,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:58:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:58:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:04,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:58:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:58:06,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-08-30 06:58:06,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 184.0) internal successors, (2208), 12 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:06,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:06,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-08-30 06:58:06,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:09,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:58:10,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:58:12,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:58:14,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:58:15,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:58:17,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:58:23,843 INFO L130 PetriNetUnfolder]: 26334/35700 cut-off events. [2023-08-30 06:58:23,843 INFO L131 PetriNetUnfolder]: For 2809/2809 co-relation queries the response was YES. [2023-08-30 06:58:23,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91242 conditions, 35700 events. 26334/35700 cut-off events. For 2809/2809 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 218486 event pairs, 17090 based on Foata normal form. 18/13620 useless extension candidates. Maximal degree in co-relation 91223. Up to 19021 conditions per place. [2023-08-30 06:58:24,290 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 365 selfloop transitions, 32 changer transitions 0/398 dead transitions. [2023-08-30 06:58:24,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 398 transitions, 2076 flow [2023-08-30 06:58:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:58:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:58:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2605 transitions. [2023-08-30 06:58:24,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449447895100069 [2023-08-30 06:58:24,299 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2605 transitions. [2023-08-30 06:58:24,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2605 transitions. [2023-08-30 06:58:24,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:24,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2605 transitions. [2023-08-30 06:58:24,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 217.08333333333334) internal successors, (2605), 12 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:24,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:24,316 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:24,316 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 244 flow. Second operand 12 states and 2605 transitions. [2023-08-30 06:58:24,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 398 transitions, 2076 flow [2023-08-30 06:58:24,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 398 transitions, 2070 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:58:24,327 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 482 flow [2023-08-30 06:58:24,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-08-30 06:58:24,329 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 19 predicate places. [2023-08-30 06:58:24,329 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 482 flow [2023-08-30 06:58:24,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.0) internal successors, (2208), 12 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:24,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:24,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:58:24,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:58:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:24,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:58:24,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1154162911, now seen corresponding path program 1 times [2023-08-30 06:58:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718313990] [2023-08-30 06:58:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:58:24,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:24,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:24,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:58:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:58:24,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:58:24,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:24,705 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:58:24,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 06:58:24,738 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:58:24,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:58:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:24,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:58:24,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:24,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718313990] [2023-08-30 06:58:24,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718313990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:58:24,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:58:24,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:58:24,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135567669] [2023-08-30 06:58:24,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:58:24,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:58:24,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:58:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:58:24,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 06:58:24,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:24,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:24,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 06:58:24,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:28,046 INFO L130 PetriNetUnfolder]: 24754/33490 cut-off events. [2023-08-30 06:58:28,046 INFO L131 PetriNetUnfolder]: For 3072/3072 co-relation queries the response was YES. [2023-08-30 06:58:28,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85619 conditions, 33490 events. 24754/33490 cut-off events. For 3072/3072 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 200632 event pairs, 16070 based on Foata normal form. 0/13199 useless extension candidates. Maximal degree in co-relation 85592. Up to 33470 conditions per place. [2023-08-30 06:58:28,278 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 72 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 06:58:28,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 624 flow [2023-08-30 06:58:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:58:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:58:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-08-30 06:58:28,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42650103519668736 [2023-08-30 06:58:28,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-08-30 06:58:28,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-08-30 06:58:28,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:28,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-08-30 06:58:28,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:28,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:28,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:28,286 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 482 flow. Second operand 3 states and 618 transitions. [2023-08-30 06:58:28,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 624 flow [2023-08-30 06:58:28,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 565 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 06:58:28,291 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 421 flow [2023-08-30 06:58:28,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-30 06:58:28,293 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 15 predicate places. [2023-08-30 06:58:28,293 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 421 flow [2023-08-30 06:58:28,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:28,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:28,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:58:28,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:58:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:28,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:58:28,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 227402752, now seen corresponding path program 1 times [2023-08-30 06:58:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:28,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707000906] [2023-08-30 06:58:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:58:28,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:28,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:28,506 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:28,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:58:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:58:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:58:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:28,650 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:58:28,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:58:28,676 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:58:28,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:58:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:58:28,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:58:28,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707000906] [2023-08-30 06:58:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707000906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:58:28,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:58:28,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:58:28,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972787180] [2023-08-30 06:58:28,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:58:28,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:58:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:58:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:58:28,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-08-30 06:58:28,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:28,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:28,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-08-30 06:58:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:30,914 INFO L130 PetriNetUnfolder]: 15514/21380 cut-off events. [2023-08-30 06:58:30,915 INFO L131 PetriNetUnfolder]: For 2631/2631 co-relation queries the response was YES. [2023-08-30 06:58:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53804 conditions, 21380 events. 15514/21380 cut-off events. For 2631/2631 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 124009 event pairs, 10150 based on Foata normal form. 0/9670 useless extension candidates. Maximal degree in co-relation 53776. Up to 21347 conditions per place. [2023-08-30 06:58:31,062 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 58 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2023-08-30 06:58:31,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 549 flow [2023-08-30 06:58:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:58:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:58:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-08-30 06:58:31,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41200828157349895 [2023-08-30 06:58:31,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-08-30 06:58:31,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-08-30 06:58:31,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:31,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-08-30 06:58:31,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:31,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:31,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:31,071 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 421 flow. Second operand 4 states and 796 transitions. [2023-08-30 06:58:31,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 549 flow [2023-08-30 06:58:31,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:58:31,076 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 432 flow [2023-08-30 06:58:31,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=432, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-30 06:58:31,077 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-30 06:58:31,077 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 432 flow [2023-08-30 06:58:31,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:31,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:31,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:58:31,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:58:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:31,288 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:58:31,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash 227402753, now seen corresponding path program 1 times [2023-08-30 06:58:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696883266] [2023-08-30 06:58:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:58:31,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:31,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:31,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:58:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:58:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:58:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:31,491 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:58:31,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:58:31,571 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:58:31,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:58:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:58:31,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:58:31,761 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:58:31,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:58:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:31,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:58:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:36,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696883266] [2023-08-30 06:58:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696883266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:58:36,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:58:36,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:58:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787615698] [2023-08-30 06:58:36,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:58:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:58:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:58:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:58:39,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 483 [2023-08-30 06:58:39,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:39,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:39,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 483 [2023-08-30 06:58:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:45,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:58:54,784 WARN L222 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:59:07,208 INFO L130 PetriNetUnfolder]: 31076/43326 cut-off events. [2023-08-30 06:59:07,209 INFO L131 PetriNetUnfolder]: For 6952/6952 co-relation queries the response was YES. [2023-08-30 06:59:07,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107550 conditions, 43326 events. 31076/43326 cut-off events. For 6952/6952 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 280352 event pairs, 20530 based on Foata normal form. 0/21986 useless extension candidates. Maximal degree in co-relation 107521. Up to 20781 conditions per place. [2023-08-30 06:59:07,490 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 170 selfloop transitions, 31 changer transitions 1/203 dead transitions. [2023-08-30 06:59:07,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 203 transitions, 1369 flow [2023-08-30 06:59:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:59:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:59:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2742 transitions. [2023-08-30 06:59:07,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784679089026915 [2023-08-30 06:59:07,498 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2742 transitions. [2023-08-30 06:59:07,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2742 transitions. [2023-08-30 06:59:07,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:07,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2742 transitions. [2023-08-30 06:59:07,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:07,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:07,519 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:07,519 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 432 flow. Second operand 15 states and 2742 transitions. [2023-08-30 06:59:07,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 203 transitions, 1369 flow [2023-08-30 06:59:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 203 transitions, 1356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:59:07,529 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 679 flow [2023-08-30 06:59:07,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=679, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-30 06:59:07,530 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2023-08-30 06:59:07,530 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 679 flow [2023-08-30 06:59:07,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:07,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:07,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:59:07,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:07,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:07,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:59:07,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1154162912, now seen corresponding path program 1 times [2023-08-30 06:59:07,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:07,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624729783] [2023-08-30 06:59:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:59:07,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:07,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:07,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:59:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:59:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:59:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:07,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:59:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:59:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:59:07,936 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:59:07,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 06:59:07,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 06:59:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:59:07,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:59:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:59:08,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:59:08,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624729783] [2023-08-30 06:59:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624729783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:59:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:59:08,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:59:08,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083469007] [2023-08-30 06:59:08,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:59:08,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:59:08,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:59:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:59:08,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 483 [2023-08-30 06:59:08,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 679 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:08,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:08,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 483 [2023-08-30 06:59:08,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:12,943 INFO L130 PetriNetUnfolder]: 29166/40536 cut-off events. [2023-08-30 06:59:12,943 INFO L131 PetriNetUnfolder]: For 25671/25671 co-relation queries the response was YES. [2023-08-30 06:59:13,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112991 conditions, 40536 events. 29166/40536 cut-off events. For 25671/25671 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 256656 event pairs, 19280 based on Foata normal form. 0/23576 useless extension candidates. Maximal degree in co-relation 112956. Up to 40496 conditions per place. [2023-08-30 06:59:13,252 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 85 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2023-08-30 06:59:13,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 847 flow [2023-08-30 06:59:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:59:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:59:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-30 06:59:13,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-08-30 06:59:13,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-30 06:59:13,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-30 06:59:13,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:13,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-30 06:59:13,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:13,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:13,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:13,258 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 679 flow. Second operand 3 states and 616 transitions. [2023-08-30 06:59:13,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 847 flow [2023-08-30 06:59:13,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 87 transitions, 826 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:59:13,327 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 656 flow [2023-08-30 06:59:13,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=656, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-08-30 06:59:13,328 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-08-30 06:59:13,328 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 656 flow [2023-08-30 06:59:13,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:13,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:13,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:59:13,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:13,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:13,545 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:59:13,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -501743347, now seen corresponding path program 1 times [2023-08-30 06:59:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:13,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513573881] [2023-08-30 06:59:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:59:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:13,547 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:13,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:59:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:59:13,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 06:59:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:59:13,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:59:13,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513573881] [2023-08-30 06:59:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513573881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:59:13,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:59:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:59:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526268228] [2023-08-30 06:59:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:59:13,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:59:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:59:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:59:13,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-08-30 06:59:13,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 656 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:13,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:13,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-08-30 06:59:13,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:17,393 INFO L130 PetriNetUnfolder]: 22796/33156 cut-off events. [2023-08-30 06:59:17,394 INFO L131 PetriNetUnfolder]: For 15739/15739 co-relation queries the response was YES. [2023-08-30 06:59:17,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88813 conditions, 33156 events. 22796/33156 cut-off events. For 15739/15739 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 208380 event pairs, 4140 based on Foata normal form. 960/20896 useless extension candidates. Maximal degree in co-relation 88777. Up to 29561 conditions per place. [2023-08-30 06:59:17,630 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 98 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-08-30 06:59:17,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 102 transitions, 910 flow [2023-08-30 06:59:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:59:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:59:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-30 06:59:17,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472049689440994 [2023-08-30 06:59:17,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-30 06:59:17,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-30 06:59:17,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:17,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-30 06:59:17,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:17,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:17,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:17,637 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 656 flow. Second operand 3 states and 648 transitions. [2023-08-30 06:59:17,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 102 transitions, 910 flow [2023-08-30 06:59:17,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 102 transitions, 909 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:59:17,677 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 684 flow [2023-08-30 06:59:17,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=684, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-08-30 06:59:17,678 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-08-30 06:59:17,678 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 684 flow [2023-08-30 06:59:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:17,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:17,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:59:17,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:17,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:17,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:59:17,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1840133057, now seen corresponding path program 1 times [2023-08-30 06:59:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007194346] [2023-08-30 06:59:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:59:17,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:17,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:17,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:17,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:59:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:59:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:59:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:59:17,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:59:17,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007194346] [2023-08-30 06:59:17,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007194346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:59:17,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:59:17,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:59:17,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796898924] [2023-08-30 06:59:17,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:59:17,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:59:17,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:59:17,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:59:17,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-08-30 06:59:17,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 684 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:17,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:17,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-08-30 06:59:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:22,339 INFO L130 PetriNetUnfolder]: 24796/36456 cut-off events. [2023-08-30 06:59:22,339 INFO L131 PetriNetUnfolder]: For 31409/31409 co-relation queries the response was YES. [2023-08-30 06:59:22,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114135 conditions, 36456 events. 24796/36456 cut-off events. For 31409/31409 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 236073 event pairs, 7740 based on Foata normal form. 1440/23896 useless extension candidates. Maximal degree in co-relation 114097. Up to 24701 conditions per place. [2023-08-30 06:59:22,644 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 99 selfloop transitions, 3 changer transitions 2/105 dead transitions. [2023-08-30 06:59:22,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 105 transitions, 972 flow [2023-08-30 06:59:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:59:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:59:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-30 06:59:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478951000690131 [2023-08-30 06:59:22,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-30 06:59:22,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-30 06:59:22,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:22,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-30 06:59:22,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:22,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:22,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:22,649 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 684 flow. Second operand 3 states and 649 transitions. [2023-08-30 06:59:22,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 105 transitions, 972 flow [2023-08-30 06:59:22,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 969 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:59:22,724 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 694 flow [2023-08-30 06:59:22,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2023-08-30 06:59:22,725 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2023-08-30 06:59:22,725 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 694 flow [2023-08-30 06:59:22,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:22,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:22,725 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:59:22,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:22,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:22,938 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:59:22,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash 483924949, now seen corresponding path program 2 times [2023-08-30 06:59:22,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:22,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081456026] [2023-08-30 06:59:22,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:59:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:22,940 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:22,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:59:23,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:59:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:59:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:59:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:23,181 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:59:23,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:59:23,302 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:59:23,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:59:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:59:23,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:59:23,433 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:59:23,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:59:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:59:23,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:59:23,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:23,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081456026] [2023-08-30 06:59:23,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081456026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:59:23,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:59:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:59:23,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684968616] [2023-08-30 06:59:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:59:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:59:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:59:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:59:23,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2023-08-30 06:59:23,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 185.5) internal successors, (742), 4 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:23,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:23,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2023-08-30 06:59:23,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:27,120 INFO L130 PetriNetUnfolder]: 18222/26870 cut-off events. [2023-08-30 06:59:27,120 INFO L131 PetriNetUnfolder]: For 28239/28239 co-relation queries the response was YES. [2023-08-30 06:59:27,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84455 conditions, 26870 events. 18222/26870 cut-off events. For 28239/28239 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 166375 event pairs, 9686 based on Foata normal form. 1550/17830 useless extension candidates. Maximal degree in co-relation 84415. Up to 26819 conditions per place. [2023-08-30 06:59:27,256 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 73 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-30 06:59:27,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 86 transitions, 832 flow [2023-08-30 06:59:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:59:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:59:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-08-30 06:59:27,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39906832298136646 [2023-08-30 06:59:27,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-08-30 06:59:27,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-08-30 06:59:27,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:27,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-08-30 06:59:27,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:27,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:27,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:27,262 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 694 flow. Second operand 4 states and 771 transitions. [2023-08-30 06:59:27,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 86 transitions, 832 flow [2023-08-30 06:59:27,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 812 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 06:59:27,282 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 666 flow [2023-08-30 06:59:27,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=666, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2023-08-30 06:59:27,283 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2023-08-30 06:59:27,283 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 666 flow [2023-08-30 06:59:27,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.5) internal successors, (742), 4 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:27,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:27,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:59:27,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:27,484 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:59:27,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 245395164, now seen corresponding path program 1 times [2023-08-30 06:59:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:27,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368415530] [2023-08-30 06:59:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:59:27,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:27,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:27,486 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:27,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:59:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:59:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:59:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:59:27,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:59:27,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368415530] [2023-08-30 06:59:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368415530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:59:27,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:59:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:59:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729232321] [2023-08-30 06:59:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:59:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:59:27,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:59:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:59:27,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-08-30 06:59:27,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:27,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:27,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-08-30 06:59:27,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:31,048 INFO L130 PetriNetUnfolder]: 16746/24752 cut-off events. [2023-08-30 06:59:31,048 INFO L131 PetriNetUnfolder]: For 6058/6058 co-relation queries the response was YES. [2023-08-30 06:59:31,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67688 conditions, 24752 events. 16746/24752 cut-off events. For 6058/6058 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 152885 event pairs, 8942 based on Foata normal form. 48/15191 useless extension candidates. Maximal degree in co-relation 67649. Up to 24164 conditions per place. [2023-08-30 06:59:31,241 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 70 selfloop transitions, 14 changer transitions 18/103 dead transitions. [2023-08-30 06:59:31,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 103 transitions, 934 flow [2023-08-30 06:59:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:59:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:59:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 819 transitions. [2023-08-30 06:59:31,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2023-08-30 06:59:31,243 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 819 transitions. [2023-08-30 06:59:31,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 819 transitions. [2023-08-30 06:59:31,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:31,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 819 transitions. [2023-08-30 06:59:31,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:31,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:31,246 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:31,246 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 666 flow. Second operand 4 states and 819 transitions. [2023-08-30 06:59:31,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 103 transitions, 934 flow [2023-08-30 06:59:31,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 921 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:59:31,251 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 703 flow [2023-08-30 06:59:31,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=703, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-08-30 06:59:31,252 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2023-08-30 06:59:31,252 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 703 flow [2023-08-30 06:59:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:31,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:31,252 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:59:31,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:31,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:31,461 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 06:59:31,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1580761263, now seen corresponding path program 3 times [2023-08-30 06:59:31,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:31,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515567703] [2023-08-30 06:59:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:59:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:31,463 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:59:31,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:59:31,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:59:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:59:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:31,728 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:59:31,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:59:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:59:32,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:59:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:59:34,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:34,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515567703] [2023-08-30 06:59:34,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515567703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:59:34,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:59:34,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:59:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491194767] [2023-08-30 06:59:34,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:59:34,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:59:34,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:59:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:59:51,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-08-30 06:59:51,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 703 flow. Second operand has 24 states, 24 states have (on average 184.0) internal successors, (4416), 24 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:51,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:51,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-08-30 06:59:51,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:00,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:02,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:04,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:06,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:08,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:10,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:12,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:14,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:16,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:17,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:00:31,942 INFO L130 PetriNetUnfolder]: 21885/32297 cut-off events. [2023-08-30 07:00:31,943 INFO L131 PetriNetUnfolder]: For 13610/13610 co-relation queries the response was YES. [2023-08-30 07:00:32,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93143 conditions, 32297 events. 21885/32297 cut-off events. For 13610/13610 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 203736 event pairs, 11633 based on Foata normal form. 24/21446 useless extension candidates. Maximal degree in co-relation 93103. Up to 13033 conditions per place. [2023-08-30 07:00:32,142 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 391 selfloop transitions, 65 changer transitions 0/457 dead transitions. [2023-08-30 07:00:32,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 457 transitions, 3289 flow [2023-08-30 07:00:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:00:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:00:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4783 transitions. [2023-08-30 07:00:32,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41261214630779847 [2023-08-30 07:00:32,151 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4783 transitions. [2023-08-30 07:00:32,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4783 transitions. [2023-08-30 07:00:32,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:32,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4783 transitions. [2023-08-30 07:00:32,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 199.29166666666666) internal successors, (4783), 24 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:32,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:32,171 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:32,171 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 703 flow. Second operand 24 states and 4783 transitions. [2023-08-30 07:00:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 457 transitions, 3289 flow [2023-08-30 07:00:32,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 457 transitions, 3136 flow, removed 50 selfloop flow, removed 3 redundant places. [2023-08-30 07:00:32,452 INFO L231 Difference]: Finished difference. Result has 126 places, 115 transitions, 1152 flow [2023-08-30 07:00:32,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1152, PETRI_PLACES=126, PETRI_TRANSITIONS=115} [2023-08-30 07:00:32,452 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 67 predicate places. [2023-08-30 07:00:32,453 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 115 transitions, 1152 flow [2023-08-30 07:00:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 184.0) internal successors, (4416), 24 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:32,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:32,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:32,466 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 (19)] Ended with exit code 0 [2023-08-30 07:00:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:32,664 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:00:32,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1840891923, now seen corresponding path program 1 times [2023-08-30 07:00:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:32,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703337160] [2023-08-30 07:00:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:32,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:32,666 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:32,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:00:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:00:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:32,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:00:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:32,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:33,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703337160] [2023-08-30 07:00:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703337160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:33,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:33,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:00:33,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137959579] [2023-08-30 07:00:33,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:33,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:00:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:00:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:00:41,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-08-30 07:00:41,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 115 transitions, 1152 flow. Second operand has 8 states, 8 states have (on average 179.5) internal successors, (1436), 8 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:41,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:41,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-08-30 07:00:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:48,450 INFO L130 PetriNetUnfolder]: 20391/30119 cut-off events. [2023-08-30 07:00:48,450 INFO L131 PetriNetUnfolder]: For 7718/7718 co-relation queries the response was YES. [2023-08-30 07:00:48,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82580 conditions, 30119 events. 20391/30119 cut-off events. For 7718/7718 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 187793 event pairs, 10769 based on Foata normal form. 0/18629 useless extension candidates. Maximal degree in co-relation 82528. Up to 24193 conditions per place. [2023-08-30 07:00:48,733 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 126 selfloop transitions, 44 changer transitions 0/171 dead transitions. [2023-08-30 07:00:48,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 171 transitions, 1692 flow [2023-08-30 07:00:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:00:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:00:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1505 transitions. [2023-08-30 07:00:48,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894927536231884 [2023-08-30 07:00:48,737 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1505 transitions. [2023-08-30 07:00:48,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1505 transitions. [2023-08-30 07:00:48,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:48,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1505 transitions. [2023-08-30 07:00:48,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.125) internal successors, (1505), 8 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,742 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,743 INFO L175 Difference]: Start difference. First operand has 126 places, 115 transitions, 1152 flow. Second operand 8 states and 1505 transitions. [2023-08-30 07:00:48,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 171 transitions, 1692 flow [2023-08-30 07:00:48,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 171 transitions, 1538 flow, removed 35 selfloop flow, removed 10 redundant places. [2023-08-30 07:00:48,763 INFO L231 Difference]: Finished difference. Result has 125 places, 117 transitions, 1123 flow [2023-08-30 07:00:48,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1123, PETRI_PLACES=125, PETRI_TRANSITIONS=117} [2023-08-30 07:00:48,764 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 66 predicate places. [2023-08-30 07:00:48,764 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 117 transitions, 1123 flow [2023-08-30 07:00:48,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.5) internal successors, (1436), 8 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:48,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:48,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:48,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:48,965 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:00:48,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1840891922, now seen corresponding path program 1 times [2023-08-30 07:00:48,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:48,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055927839] [2023-08-30 07:00:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:48,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:48,967 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:48,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:00:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:49,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:00:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:49,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 07:00:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:00:49,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:49,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:49,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055927839] [2023-08-30 07:00:49,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055927839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:49,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:49,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:00:49,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963654345] [2023-08-30 07:00:49,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:49,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:00:49,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:00:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:00:49,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-08-30 07:00:49,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 117 transitions, 1123 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:49,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:49,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-08-30 07:00:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:52,325 INFO L130 PetriNetUnfolder]: 14667/21767 cut-off events. [2023-08-30 07:00:52,325 INFO L131 PetriNetUnfolder]: For 14816/14816 co-relation queries the response was YES. [2023-08-30 07:00:52,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63391 conditions, 21767 events. 14667/21767 cut-off events. For 14816/14816 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 131120 event pairs, 7493 based on Foata normal form. 0/16637 useless extension candidates. Maximal degree in co-relation 63337. Up to 21612 conditions per place. [2023-08-30 07:00:52,502 INFO L137 encePairwiseOnDemand]: 479/483 looper letters, 95 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2023-08-30 07:00:52,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 115 transitions, 1343 flow [2023-08-30 07:00:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:00:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:00:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-08-30 07:00:52,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078674948240166 [2023-08-30 07:00:52,504 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-08-30 07:00:52,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-08-30 07:00:52,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:52,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-08-30 07:00:52,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:52,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:52,507 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:52,507 INFO L175 Difference]: Start difference. First operand has 125 places, 117 transitions, 1123 flow. Second operand 4 states and 788 transitions. [2023-08-30 07:00:52,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 115 transitions, 1343 flow [2023-08-30 07:00:52,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 115 transitions, 1206 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 07:00:52,565 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1016 flow [2023-08-30 07:00:52,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1016, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2023-08-30 07:00:52,566 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 62 predicate places. [2023-08-30 07:00:52,566 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1016 flow [2023-08-30 07:00:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:52,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:52,566 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:52,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:52,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:52,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:00:52,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1228372836, now seen corresponding path program 2 times [2023-08-30 07:00:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:52,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695809758] [2023-08-30 07:00:52,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:00:52,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:52,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:52,770 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:52,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:00:52,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:00:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:00:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:00:52,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:52,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:00:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:00:53,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:53,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695809758] [2023-08-30 07:00:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695809758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:53,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:00:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967374197] [2023-08-30 07:00:53,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:00:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:00:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:00:53,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-08-30 07:00:53,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1016 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:53,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:53,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-08-30 07:00:53,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:55,181 INFO L130 PetriNetUnfolder]: 10035/14965 cut-off events. [2023-08-30 07:00:55,181 INFO L131 PetriNetUnfolder]: For 13163/13163 co-relation queries the response was YES. [2023-08-30 07:00:55,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40992 conditions, 14965 events. 10035/14965 cut-off events. For 13163/13163 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 86655 event pairs, 4987 based on Foata normal form. 1566/12670 useless extension candidates. Maximal degree in co-relation 40938. Up to 14814 conditions per place. [2023-08-30 07:00:55,293 INFO L137 encePairwiseOnDemand]: 479/483 looper letters, 71 selfloop transitions, 41 changer transitions 0/113 dead transitions. [2023-08-30 07:00:55,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 113 transitions, 1224 flow [2023-08-30 07:00:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:00:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:00:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2023-08-30 07:00:55,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40683229813664595 [2023-08-30 07:00:55,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2023-08-30 07:00:55,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2023-08-30 07:00:55,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:55,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2023-08-30 07:00:55,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:55,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:55,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:55,297 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1016 flow. Second operand 4 states and 786 transitions. [2023-08-30 07:00:55,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 113 transitions, 1224 flow [2023-08-30 07:00:55,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1195 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:00:55,312 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 1053 flow [2023-08-30 07:00:55,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1053, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2023-08-30 07:00:55,313 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2023-08-30 07:00:55,313 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 1053 flow [2023-08-30 07:00:55,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:55,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:55,314 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-08-30 07:00:55,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:55,526 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:00:55,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash 396204685, now seen corresponding path program 1 times [2023-08-30 07:00:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589833422] [2023-08-30 07:00:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:55,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:55,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:55,529 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:55,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:00:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:55,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 07:00:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:00:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:56,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:01:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:01:00,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:01:00,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589833422] [2023-08-30 07:01:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589833422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:01:00,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:01:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-30 07:01:00,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102487948] [2023-08-30 07:01:00,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:01:00,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 07:01:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:01:00,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 07:01:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-30 07:01:33,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 483 [2023-08-30 07:01:33,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 1053 flow. Second operand has 30 states, 30 states have (on average 182.03333333333333) internal successors, (5461), 30 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:33,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:33,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 483 [2023-08-30 07:01:33,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:01:44,047 WARN L222 SmtUtils]: Spent 7.32s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:01:46,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:48,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:49,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:51,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:53,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:55,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:57,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:01:59,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:02:01,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:02:03,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:02:05,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:02:07,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:02:09,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:02:17,487 WARN L222 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:02:53,694 INFO L130 PetriNetUnfolder]: 23685/35305 cut-off events. [2023-08-30 07:02:53,695 INFO L131 PetriNetUnfolder]: For 18737/18737 co-relation queries the response was YES. [2023-08-30 07:02:53,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96443 conditions, 35305 events. 23685/35305 cut-off events. For 18737/18737 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 216572 event pairs, 11797 based on Foata normal form. 60/26314 useless extension candidates. Maximal degree in co-relation 96392. Up to 12013 conditions per place. [2023-08-30 07:02:54,064 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 741 selfloop transitions, 77 changer transitions 0/819 dead transitions. [2023-08-30 07:02:54,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 819 transitions, 5820 flow [2023-08-30 07:02:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 07:02:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 07:02:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6085 transitions. [2023-08-30 07:02:54,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199447895100069 [2023-08-30 07:02:54,071 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6085 transitions. [2023-08-30 07:02:54,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6085 transitions. [2023-08-30 07:02:54,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:02:54,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6085 transitions. [2023-08-30 07:02:54,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 202.83333333333334) internal successors, (6085), 30 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:54,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 483.0) internal successors, (14973), 31 states have internal predecessors, (14973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:54,088 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 483.0) internal successors, (14973), 31 states have internal predecessors, (14973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:54,088 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 1053 flow. Second operand 30 states and 6085 transitions. [2023-08-30 07:02:54,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 819 transitions, 5820 flow [2023-08-30 07:02:54,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 819 transitions, 5690 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:02:54,120 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 1490 flow [2023-08-30 07:02:54,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1490, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2023-08-30 07:02:54,121 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 102 predicate places. [2023-08-30 07:02:54,121 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 1490 flow [2023-08-30 07:02:54,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 182.03333333333333) internal successors, (5461), 30 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:54,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:02:54,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:02:54,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:02:54,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:54,325 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:02:54,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:02:54,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1895524827, now seen corresponding path program 1 times [2023-08-30 07:02:54,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:02:54,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12857191] [2023-08-30 07:02:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:02:54,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:02:54,326 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:02:54,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:02:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:02:54,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:02:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:02:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:02:55,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:02:55,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:02:55,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12857191] [2023-08-30 07:02:55,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12857191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:02:55,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:02:55,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 07:02:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442731439] [2023-08-30 07:02:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:02:55,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:02:55,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:02:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:02:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:02:55,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 483 [2023-08-30 07:02:55,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 1490 flow. Second operand has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:55,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:02:55,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 483 [2023-08-30 07:02:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:03,174 INFO L130 PetriNetUnfolder]: 33935/52588 cut-off events. [2023-08-30 07:03:03,174 INFO L131 PetriNetUnfolder]: For 12108/12108 co-relation queries the response was YES. [2023-08-30 07:03:03,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139474 conditions, 52588 events. 33935/52588 cut-off events. For 12108/12108 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 367251 event pairs, 2437 based on Foata normal form. 78/40810 useless extension candidates. Maximal degree in co-relation 139406. Up to 35569 conditions per place. [2023-08-30 07:03:03,999 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 144 selfloop transitions, 39 changer transitions 3/186 dead transitions. [2023-08-30 07:03:03,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 186 transitions, 2007 flow [2023-08-30 07:03:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:03:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:03:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1758 transitions. [2023-08-30 07:03:04,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044168391994479 [2023-08-30 07:03:04,002 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1758 transitions. [2023-08-30 07:03:04,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1758 transitions. [2023-08-30 07:03:04,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:04,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1758 transitions. [2023-08-30 07:03:04,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.33333333333334) internal successors, (1758), 9 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:04,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:04,006 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:04,006 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 1490 flow. Second operand 9 states and 1758 transitions. [2023-08-30 07:03:04,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 186 transitions, 2007 flow [2023-08-30 07:03:04,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 1889 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-08-30 07:03:04,049 INFO L231 Difference]: Finished difference. Result has 160 places, 145 transitions, 1521 flow [2023-08-30 07:03:04,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=160, PETRI_TRANSITIONS=145} [2023-08-30 07:03:04,049 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 101 predicate places. [2023-08-30 07:03:04,049 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 145 transitions, 1521 flow [2023-08-30 07:03:04,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:04,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:04,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:04,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-08-30 07:03:04,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:03:04,250 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:03:04,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -837557187, now seen corresponding path program 2 times [2023-08-30 07:03:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:03:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505362338] [2023-08-30 07:03:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:03:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:03:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:03:04,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:03:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:03:04,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:03:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:03:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:03:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:04,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:03:04,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:03:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505362338] [2023-08-30 07:03:04,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505362338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:04,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:04,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 07:03:04,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335192603] [2023-08-30 07:03:04,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:04,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:03:04,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:03:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:03:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:03:05,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 07:03:05,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 145 transitions, 1521 flow. Second operand has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:05,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:05,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 07:03:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:14,751 INFO L130 PetriNetUnfolder]: 37659/59070 cut-off events. [2023-08-30 07:03:14,751 INFO L131 PetriNetUnfolder]: For 50849/50849 co-relation queries the response was YES. [2023-08-30 07:03:15,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190161 conditions, 59070 events. 37659/59070 cut-off events. For 50849/50849 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 422131 event pairs, 8685 based on Foata normal form. 75/47895 useless extension candidates. Maximal degree in co-relation 190089. Up to 47401 conditions per place. [2023-08-30 07:03:15,914 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 143 selfloop transitions, 41 changer transitions 3/187 dead transitions. [2023-08-30 07:03:15,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 187 transitions, 2057 flow [2023-08-30 07:03:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:03:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:03:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1739 transitions. [2023-08-30 07:03:15,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000460087416609 [2023-08-30 07:03:15,918 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1739 transitions. [2023-08-30 07:03:15,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1739 transitions. [2023-08-30 07:03:15,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:15,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1739 transitions. [2023-08-30 07:03:15,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.22222222222223) internal successors, (1739), 9 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:15,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:15,922 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:15,922 INFO L175 Difference]: Start difference. First operand has 160 places, 145 transitions, 1521 flow. Second operand 9 states and 1739 transitions. [2023-08-30 07:03:15,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 187 transitions, 2057 flow [2023-08-30 07:03:18,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 187 transitions, 1979 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-30 07:03:18,367 INFO L231 Difference]: Finished difference. Result has 170 places, 159 transitions, 1678 flow [2023-08-30 07:03:18,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2023-08-30 07:03:18,368 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 111 predicate places. [2023-08-30 07:03:18,368 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 1678 flow [2023-08-30 07:03:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:18,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:18,368 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 07:03:18,377 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 (25)] Ended with exit code 0 [2023-08-30 07:03:18,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:03:18,569 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:03:18,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash 783778223, now seen corresponding path program 4 times [2023-08-30 07:03:18,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:03:18,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483563784] [2023-08-30 07:03:18,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:03:18,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:03:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:03:18,571 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:03:18,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 07:03:18,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:03:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:03:18,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 07:03:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:18,867 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:03:18,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:03:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:19,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:29,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:03:29,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483563784] [2023-08-30 07:03:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483563784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:29,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:03:29,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 07:03:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789408407] [2023-08-30 07:03:29,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:29,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 07:03:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:03:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 07:03:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 07:04:50,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-08-30 07:04:50,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 1678 flow. Second operand has 48 states, 48 states have (on average 184.0) internal successors, (8832), 48 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:50,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:04:50,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-08-30 07:04:50,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:05:19,685 WARN L222 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:05:37,725 WARN L222 SmtUtils]: Spent 15.72s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:05:52,899 WARN L222 SmtUtils]: Spent 12.49s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:05:55,626 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 [] [2023-08-30 07:05:57,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:05:59,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:01,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:03,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:05,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:07,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:09,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:11,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:13,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:15,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:17,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:19,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:21,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:23,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:25,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:27,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:29,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:31,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:33,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:35,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:37,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:06:51,979 WARN L222 SmtUtils]: Spent 12.91s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:07:06,937 WARN L222 SmtUtils]: Spent 12.56s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:07:18,077 WARN L222 SmtUtils]: Spent 8.86s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:07:27,101 WARN L222 SmtUtils]: Spent 6.69s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:07:35,388 WARN L222 SmtUtils]: Spent 6.43s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:08:14,058 INFO L130 PetriNetUnfolder]: 37537/58897 cut-off events. [2023-08-30 07:08:14,058 INFO L131 PetriNetUnfolder]: For 82858/82858 co-relation queries the response was YES. [2023-08-30 07:08:14,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211985 conditions, 58897 events. 37537/58897 cut-off events. For 82858/82858 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 424056 event pairs, 19697 based on Foata normal form. 24/47901 useless extension candidates. Maximal degree in co-relation 211908. Up to 15289 conditions per place. [2023-08-30 07:08:15,176 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 1258 selfloop transitions, 131 changer transitions 0/1391 dead transitions. [2023-08-30 07:08:15,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1391 transitions, 13053 flow [2023-08-30 07:08:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 07:08:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 07:08:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9460 transitions. [2023-08-30 07:08:15,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408040027605245 [2023-08-30 07:08:15,188 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9460 transitions. [2023-08-30 07:08:15,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9460 transitions. [2023-08-30 07:08:15,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:15,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9460 transitions. [2023-08-30 07:08:15,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 197.08333333333334) internal successors, (9460), 48 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:15,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 483.0) internal successors, (23667), 49 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:15,218 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 483.0) internal successors, (23667), 49 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:15,218 INFO L175 Difference]: Start difference. First operand has 170 places, 159 transitions, 1678 flow. Second operand 48 states and 9460 transitions. [2023-08-30 07:08:15,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1391 transitions, 13053 flow [2023-08-30 07:08:19,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 1391 transitions, 12299 flow, removed 336 selfloop flow, removed 1 redundant places. [2023-08-30 07:08:19,627 INFO L231 Difference]: Finished difference. Result has 241 places, 210 transitions, 2587 flow [2023-08-30 07:08:19,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2587, PETRI_PLACES=241, PETRI_TRANSITIONS=210} [2023-08-30 07:08:19,628 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 182 predicate places. [2023-08-30 07:08:19,628 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 210 transitions, 2587 flow [2023-08-30 07:08:19,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 184.0) internal successors, (8832), 48 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:19,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:19,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:08:19,644 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 (26)] Ended with exit code 0 [2023-08-30 07:08:19,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:08:19,845 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:08:19,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1722812995, now seen corresponding path program 3 times [2023-08-30 07:08:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:08:19,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120770499] [2023-08-30 07:08:19,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:08:19,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:08:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:08:19,847 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:08:19,850 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 (27)] Waiting until timeout for monitored process [2023-08-30 07:08:20,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 07:08:20,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:08:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:08:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:08:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:08:20,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:08:20,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:08:20,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120770499] [2023-08-30 07:08:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120770499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:20,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:20,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 07:08:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408065998] [2023-08-30 07:08:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:08:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:08:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:08:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:08:20,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 483 [2023-08-30 07:08:20,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 210 transitions, 2587 flow. Second operand has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:20,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:20,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 483 [2023-08-30 07:08:20,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:34,658 INFO L130 PetriNetUnfolder]: 47921/75122 cut-off events. [2023-08-30 07:08:34,658 INFO L131 PetriNetUnfolder]: For 71625/71625 co-relation queries the response was YES. [2023-08-30 07:08:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264067 conditions, 75122 events. 47921/75122 cut-off events. For 71625/71625 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 558247 event pairs, 5869 based on Foata normal form. 78/61004 useless extension candidates. Maximal degree in co-relation 263964. Up to 47425 conditions per place. [2023-08-30 07:08:36,321 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 200 selfloop transitions, 61 changer transitions 3/264 dead transitions. [2023-08-30 07:08:36,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 264 transitions, 3314 flow [2023-08-30 07:08:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:08:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:08:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1764 transitions. [2023-08-30 07:08:36,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2023-08-30 07:08:36,325 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1764 transitions. [2023-08-30 07:08:36,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1764 transitions. [2023-08-30 07:08:36,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:08:36,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1764 transitions. [2023-08-30 07:08:36,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:36,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:36,332 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:36,332 INFO L175 Difference]: Start difference. First operand has 241 places, 210 transitions, 2587 flow. Second operand 9 states and 1764 transitions. [2023-08-30 07:08:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 264 transitions, 3314 flow [2023-08-30 07:08:43,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 264 transitions, 3025 flow, removed 66 selfloop flow, removed 21 redundant places. [2023-08-30 07:08:43,178 INFO L231 Difference]: Finished difference. Result has 230 places, 221 transitions, 2540 flow [2023-08-30 07:08:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2540, PETRI_PLACES=230, PETRI_TRANSITIONS=221} [2023-08-30 07:08:43,179 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 171 predicate places. [2023-08-30 07:08:43,179 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 221 transitions, 2540 flow [2023-08-30 07:08:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:08:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:08:43,187 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:08:43,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:08:43,380 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:08:43,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:08:43,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1238638903, now seen corresponding path program 4 times [2023-08-30 07:08:43,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:08:43,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477465498] [2023-08-30 07:08:43,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:08:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:08:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:08:43,382 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:08:43,384 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 (28)] Waiting until timeout for monitored process [2023-08-30 07:08:43,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:08:43,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:08:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:08:43,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:08:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:08:43,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:08:43,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:08:43,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477465498] [2023-08-30 07:08:43,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477465498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:08:43,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:08:43,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 07:08:43,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270032175] [2023-08-30 07:08:43,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:08:43,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:08:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:08:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:08:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:08:44,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-08-30 07:08:44,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 221 transitions, 2540 flow. Second operand has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:08:44,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:08:44,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-08-30 07:08:44,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:08:58,541 INFO L130 PetriNetUnfolder]: 46758/74043 cut-off events. [2023-08-30 07:08:58,541 INFO L131 PetriNetUnfolder]: For 120309/120309 co-relation queries the response was YES. [2023-08-30 07:09:00,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300225 conditions, 74043 events. 46758/74043 cut-off events. For 120309/120309 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 555740 event pairs, 12393 based on Foata normal form. 75/61218 useless extension candidates. Maximal degree in co-relation 300119. Up to 62326 conditions per place. [2023-08-30 07:09:00,678 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 212 selfloop transitions, 45 changer transitions 3/260 dead transitions. [2023-08-30 07:09:00,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 260 transitions, 3212 flow [2023-08-30 07:09:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:09:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:09:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1741 transitions. [2023-08-30 07:09:00,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005060961582701 [2023-08-30 07:09:00,681 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1741 transitions. [2023-08-30 07:09:00,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1741 transitions. [2023-08-30 07:09:00,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:00,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1741 transitions. [2023-08-30 07:09:00,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.44444444444446) internal successors, (1741), 9 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,687 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:00,687 INFO L175 Difference]: Start difference. First operand has 230 places, 221 transitions, 2540 flow. Second operand 9 states and 1741 transitions. [2023-08-30 07:09:00,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 260 transitions, 3212 flow [2023-08-30 07:09:14,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 260 transitions, 3074 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-08-30 07:09:14,944 INFO L231 Difference]: Finished difference. Result has 238 places, 228 transitions, 2599 flow [2023-08-30 07:09:14,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2599, PETRI_PLACES=238, PETRI_TRANSITIONS=228} [2023-08-30 07:09:14,944 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 179 predicate places. [2023-08-30 07:09:14,944 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 228 transitions, 2599 flow [2023-08-30 07:09:14,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:14,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:14,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:09:14,953 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:09:15,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:09:15,146 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:09:15,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 790470212, now seen corresponding path program 1 times [2023-08-30 07:09:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:09:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091321223] [2023-08-30 07:09:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:15,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:09:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:09:15,148 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:09:15,149 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 (29)] Waiting until timeout for monitored process [2023-08-30 07:09:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:09:15,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:09:15,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:09:15,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:09:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091321223] [2023-08-30 07:09:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091321223] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:09:15,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:09:15,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:09:15,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216879665] [2023-08-30 07:09:15,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:09:15,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:09:15,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:09:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:09:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:09:18,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:09:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-08-30 07:09:18,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 228 transitions, 2599 flow. Second operand has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:18,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:18,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-08-30 07:09:18,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:09:20,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:09:22,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:09:36,467 INFO L130 PetriNetUnfolder]: 42099/69720 cut-off events. [2023-08-30 07:09:36,467 INFO L131 PetriNetUnfolder]: For 122508/123300 co-relation queries the response was YES. [2023-08-30 07:09:38,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260813 conditions, 69720 events. 42099/69720 cut-off events. For 122508/123300 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 561824 event pairs, 14064 based on Foata normal form. 1800/61020 useless extension candidates. Maximal degree in co-relation 260702. Up to 54526 conditions per place. [2023-08-30 07:09:38,185 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 211 selfloop transitions, 11 changer transitions 26/250 dead transitions. [2023-08-30 07:09:38,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 250 transitions, 3090 flow [2023-08-30 07:09:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:09:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:09:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-08-30 07:09:38,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40131124913733607 [2023-08-30 07:09:38,188 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-08-30 07:09:38,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-08-30 07:09:38,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:09:38,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-08-30 07:09:38,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:38,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:38,191 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:38,191 INFO L175 Difference]: Start difference. First operand has 238 places, 228 transitions, 2599 flow. Second operand 6 states and 1163 transitions. [2023-08-30 07:09:38,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 250 transitions, 3090 flow [2023-08-30 07:09:49,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 250 transitions, 2993 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 07:09:49,326 INFO L231 Difference]: Finished difference. Result has 239 places, 217 transitions, 2399 flow [2023-08-30 07:09:49,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2399, PETRI_PLACES=239, PETRI_TRANSITIONS=217} [2023-08-30 07:09:49,327 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 180 predicate places. [2023-08-30 07:09:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 217 transitions, 2399 flow [2023-08-30 07:09:49,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:49,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:09:49,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:09:49,339 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 07:09:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:09:49,532 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:09:49,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:09:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1574476553, now seen corresponding path program 1 times [2023-08-30 07:09:49,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:09:49,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125674800] [2023-08-30 07:09:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:09:49,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:09:49,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:09:49,535 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:09:49,536 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 (30)] Waiting until timeout for monitored process [2023-08-30 07:09:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:09:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:09:49,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:09:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:09:49,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:09:49,894 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:09:49,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-08-30 07:09:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:09:49,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:09:49,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125674800] [2023-08-30 07:09:49,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125674800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:09:49,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:09:49,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:09:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462978450] [2023-08-30 07:09:49,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:09:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:09:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:09:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:09:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:09:50,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 483 [2023-08-30 07:09:50,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 217 transitions, 2399 flow. Second operand has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:09:50,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:09:50,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 483 [2023-08-30 07:09:50,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:05,523 INFO L130 PetriNetUnfolder]: 49074/77895 cut-off events. [2023-08-30 07:10:05,523 INFO L131 PetriNetUnfolder]: For 136666/137458 co-relation queries the response was YES. [2023-08-30 07:10:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290702 conditions, 77895 events. 49074/77895 cut-off events. For 136666/137458 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 595788 event pairs, 10764 based on Foata normal form. 0/65220 useless extension candidates. Maximal degree in co-relation 290591. Up to 47026 conditions per place. [2023-08-30 07:10:07,684 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 240 selfloop transitions, 19 changer transitions 0/261 dead transitions. [2023-08-30 07:10:07,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 261 transitions, 3107 flow [2023-08-30 07:10:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:10:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:10:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1201 transitions. [2023-08-30 07:10:07,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414423740510697 [2023-08-30 07:10:07,688 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1201 transitions. [2023-08-30 07:10:07,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1201 transitions. [2023-08-30 07:10:07,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:07,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1201 transitions. [2023-08-30 07:10:07,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.16666666666666) internal successors, (1201), 6 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:07,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:07,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:07,691 INFO L175 Difference]: Start difference. First operand has 239 places, 217 transitions, 2399 flow. Second operand 6 states and 1201 transitions. [2023-08-30 07:10:07,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 261 transitions, 3107 flow [2023-08-30 07:10:14,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 261 transitions, 3068 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-30 07:10:14,468 INFO L231 Difference]: Finished difference. Result has 236 places, 223 transitions, 2467 flow [2023-08-30 07:10:14,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2467, PETRI_PLACES=236, PETRI_TRANSITIONS=223} [2023-08-30 07:10:14,469 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 177 predicate places. [2023-08-30 07:10:14,469 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 223 transitions, 2467 flow [2023-08-30 07:10:14,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:14,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:14,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:14,480 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 07:10:14,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:10:14,680 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:10:14,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash 39362839, now seen corresponding path program 2 times [2023-08-30 07:10:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:10:14,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122087439] [2023-08-30 07:10:14,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:10:14,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:10:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:10:14,682 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:10:14,683 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 (31)] Waiting until timeout for monitored process [2023-08-30 07:10:14,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:10:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:10:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:14,946 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 510 treesize of output 494 [2023-08-30 07:10:15,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:10:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:10:15,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:15,204 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1202 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1202) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 07:10:15,310 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:10:15,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 116 [2023-08-30 07:10:15,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:10:15,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 30 [2023-08-30 07:10:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2023-08-30 07:10:15,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:10:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122087439] [2023-08-30 07:10:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122087439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:15,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:10:15,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 07:10:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616990689] [2023-08-30 07:10:15,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:10:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:10:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:10:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2023-08-30 07:10:15,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 483 [2023-08-30 07:10:15,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 223 transitions, 2467 flow. Second operand has 12 states, 12 states have (on average 167.41666666666666) internal successors, (2009), 12 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:15,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:15,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 483 [2023-08-30 07:10:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand