./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:20:32,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:20:32,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:20:32,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:20:32,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:20:32,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:20:32,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:20:32,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:20:32,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:20:32,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:20:32,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:20:32,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:20:32,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:20:32,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:20:32,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:20:32,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:20:32,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:20:32,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:20:32,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:20:32,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:20:32,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:20:32,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:20:32,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:20:32,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:20:32,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:20:32,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:20:32,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:20:32,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:20:32,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:20:32,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:20:32,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:20:32,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:20:32,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:20:32,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:20:32,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:20:32,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:20:32,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:20:32,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:20:32,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:20:32,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:20:32,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:20:32,616 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:20:32,648 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:20:32,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:20:32,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:20:32,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:20:32,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:20:32,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:20:32,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:20:32,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:20:32,651 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:20:32,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:20:32,652 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:20:32,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:20:32,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:20:32,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:20:32,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:20:32,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:20:32,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:20:32,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:20:32,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:20:32,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:20:32,654 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:20:32,654 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:20:32,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:20:32,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:20:32,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:20:32,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:20:32,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:20:32,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:20:32,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:20:32,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:20:32,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:20:32,656 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:20:32,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:20:32,657 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:20:32,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:20:32,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:20:32,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:20:32,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:20:32,983 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:20:32,983 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:20:32,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-29 22:20:34,077 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:20:34,312 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:20:34,313 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-29 22:20:34,318 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006cf579b/c89c8b62cd5e4a29ab8604449c43e63a/FLAG21731ef3b [2023-08-29 22:20:34,331 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006cf579b/c89c8b62cd5e4a29ab8604449c43e63a [2023-08-29 22:20:34,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:20:34,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:20:34,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:20:34,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:20:34,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:20:34,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:20:34" (1/1) ... [2023-08-29 22:20:34,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a74eca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:34, skipping insertion in model container [2023-08-29 22:20:34,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:20:34" (1/1) ... [2023-08-29 22:20:34,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:20:34,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:20:34,538 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/array-eq-trans.wvr.c[2737,2750] [2023-08-29 22:20:34,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:20:34,565 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:20:34,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@347524c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:34, skipping insertion in model container [2023-08-29 22:20:34,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:20:34,568 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:20:34,570 INFO L158 Benchmark]: Toolchain (without parser) took 234.71ms. Allocated memory is still 73.4MB. Free memory was 51.3MB in the beginning and 41.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:20:34,570 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 38.7MB in the beginning and 38.6MB in the end (delta: 57.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:20:34,571 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.80ms. Allocated memory is still 73.4MB. Free memory was 51.1MB in the beginning and 41.5MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:20:34,573 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 38.7MB in the beginning and 38.6MB in the end (delta: 57.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.80ms. Allocated memory is still 73.4MB. Free memory was 51.1MB in the beginning and 41.5MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:20:36,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:20:36,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:20:36,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:20:36,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:20:36,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:20:36,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:20:36,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:20:36,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:20:36,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:20:36,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:20:36,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:20:36,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:20:36,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:20:36,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:20:36,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:20:36,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:20:36,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:20:36,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:20:36,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:20:36,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:20:36,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:20:36,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:20:36,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:20:36,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:20:36,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:20:36,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:20:36,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:20:36,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:20:36,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:20:36,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:20:36,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:20:36,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:20:36,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:20:36,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:20:36,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:20:36,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:20:36,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:20:36,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:20:36,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:20:36,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:20:36,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:20:36,383 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:20:36,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:20:36,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:20:36,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:20:36,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:20:36,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:20:36,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:20:36,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:20:36,386 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:20:36,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:20:36,387 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:20:36,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:20:36,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:20:36,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:20:36,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:20:36,388 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:20:36,388 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:20:36,389 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:20:36,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:20:36,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:20:36,389 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:20:36,389 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:20:36,390 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:20:36,390 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:20:36,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:20:36,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:20:36,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:20:36,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:20:36,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:20:36,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:20:36,391 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:20:36,391 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:20:36,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:20:36,392 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:20:36,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:20:36,392 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:20:36,392 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:20:36,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:20:36,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:20:36,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:20:36,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:20:36,694 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:20:36,694 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:20:36,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-29 22:20:37,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:20:38,159 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:20:38,159 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-29 22:20:38,165 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b083bd4b/17f3607899de49fab7358e0d6ea882ec/FLAG8e4fb263e [2023-08-29 22:20:38,176 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b083bd4b/17f3607899de49fab7358e0d6ea882ec [2023-08-29 22:20:38,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:20:38,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:20:38,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:20:38,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:20:38,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:20:38,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddd6acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38, skipping insertion in model container [2023-08-29 22:20:38,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:20:38,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:20:38,342 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/array-eq-trans.wvr.c[2737,2750] [2023-08-29 22:20:38,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:20:38,372 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:20:38,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:20:38,390 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/array-eq-trans.wvr.c[2737,2750] [2023-08-29 22:20:38,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:20:38,398 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:20:38,418 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/array-eq-trans.wvr.c[2737,2750] [2023-08-29 22:20:38,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:20:38,435 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:20:38,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38 WrapperNode [2023-08-29 22:20:38,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:20:38,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:20:38,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:20:38,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:20:38,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,474 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2023-08-29 22:20:38,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:20:38,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:20:38,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:20:38,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:20:38,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,507 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:20:38,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:20:38,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:20:38,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:20:38,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (1/1) ... [2023-08-29 22:20:38,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:20:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:20:38,566 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) [2023-08-29 22:20:38,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:20:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:20:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:20:38,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:20:38,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:20:38,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:20:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:20:38,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:20:38,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:20:38,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:20:38,612 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:20:38,700 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:20:38,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:20:39,468 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:20:39,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:20:39,476 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:20:39,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:20:39 BoogieIcfgContainer [2023-08-29 22:20:39,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:20:39,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:20:39,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:20:39,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:20:39,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:20:38" (1/3) ... [2023-08-29 22:20:39,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171d3d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:20:39, skipping insertion in model container [2023-08-29 22:20:39,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:20:38" (2/3) ... [2023-08-29 22:20:39,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171d3d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:20:39, skipping insertion in model container [2023-08-29 22:20:39,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:20:39" (3/3) ... [2023-08-29 22:20:39,486 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2023-08-29 22:20:39,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:20:39,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-29 22:20:39,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:20:39,630 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:20:39,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 327 transitions, 678 flow [2023-08-29 22:20:39,806 INFO L130 PetriNetUnfolder]: 30/324 cut-off events. [2023-08-29 22:20:39,807 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:20:39,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 30/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 481 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-08-29 22:20:39,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 327 transitions, 678 flow [2023-08-29 22:20:39,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 300 places, 320 transitions, 658 flow [2023-08-29 22:20:39,822 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:20:39,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 300 places, 320 transitions, 658 flow [2023-08-29 22:20:39,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 300 places, 320 transitions, 658 flow [2023-08-29 22:20:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 320 transitions, 658 flow [2023-08-29 22:20:39,879 INFO L130 PetriNetUnfolder]: 30/320 cut-off events. [2023-08-29 22:20:39,879 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:20:39,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 320 events. 30/320 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 477 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-08-29 22:20:39,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-08-29 22:21:56,963 INFO L134 LiptonReduction]: Checked pairs total: 7632 [2023-08-29 22:21:56,963 INFO L136 LiptonReduction]: Total number of compositions: 396 [2023-08-29 22:21:56,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:21:56,980 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;@6eab2868, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:21:56,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-08-29 22:21:56,983 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:21:56,983 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:21:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:21:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:21:56,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:21:56,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:21:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 40080, now seen corresponding path program 1 times [2023-08-29 22:21:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:21:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473737398] [2023-08-29 22:21:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:21:56,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:21:57,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:21:57,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:21:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:21:57,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:21:57,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:21:57,316 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:21:57,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:21:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:21:57,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:21:57,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:21:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473737398] [2023-08-29 22:21:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473737398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:21:57,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:21:57,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:21:57,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29942608] [2023-08-29 22:21:57,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:21:57,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:21:57,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:21:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:21:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:21:57,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 723 [2023-08-29 22:21:57,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:57,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:21:57,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 723 [2023-08-29 22:21:57,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:00,203 INFO L130 PetriNetUnfolder]: 8875/12108 cut-off events. [2023-08-29 22:22:00,204 INFO L131 PetriNetUnfolder]: For 250/250 co-relation queries the response was YES. [2023-08-29 22:22:00,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24547 conditions, 12108 events. 8875/12108 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 61852 event pairs, 6734 based on Foata normal form. 0/3153 useless extension candidates. Maximal degree in co-relation 11012. Up to 6057 conditions per place. [2023-08-29 22:22:00,292 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 132 selfloop transitions, 6 changer transitions 0/138 dead transitions. [2023-08-29 22:22:00,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 138 transitions, 588 flow [2023-08-29 22:22:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1013 transitions. [2023-08-29 22:22:00,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467035500230521 [2023-08-29 22:22:00,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1013 transitions. [2023-08-29 22:22:00,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1013 transitions. [2023-08-29 22:22:00,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:00,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1013 transitions. [2023-08-29 22:22:00,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:00,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:00,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:00,332 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 162 flow. Second operand 3 states and 1013 transitions. [2023-08-29 22:22:00,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 138 transitions, 588 flow [2023-08-29 22:22:00,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 138 transitions, 564 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:22:00,354 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 198 flow [2023-08-29 22:22:00,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-08-29 22:22:00,359 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-08-29 22:22:00,359 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 198 flow [2023-08-29 22:22:00,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:00,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:00,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:22:00,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 22:22:00,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:00,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:00,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash 40079, now seen corresponding path program 1 times [2023-08-29 22:22:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:00,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795773588] [2023-08-29 22:22:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:00,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:00,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:00,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:00,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:22:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:22:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:00,725 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:22:00,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:22:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:00,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:00,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795773588] [2023-08-29 22:22:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795773588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:00,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:00,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:00,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053421443] [2023-08-29 22:22:00,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:00,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:00,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:00,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 723 [2023-08-29 22:22:00,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:00,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:00,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 723 [2023-08-29 22:22:00,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:02,591 INFO L130 PetriNetUnfolder]: 8875/12102 cut-off events. [2023-08-29 22:22:02,591 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-08-29 22:22:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24342 conditions, 12102 events. 8875/12102 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 61891 event pairs, 6734 based on Foata normal form. 4/3163 useless extension candidates. Maximal degree in co-relation 12151. Up to 12102 conditions per place. [2023-08-29 22:22:02,640 INFO L137 encePairwiseOnDemand]: 719/723 looper letters, 72 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-29 22:22:02,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 338 flow [2023-08-29 22:22:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 941 transitions. [2023-08-29 22:22:02,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433840479483633 [2023-08-29 22:22:02,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 941 transitions. [2023-08-29 22:22:02,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 941 transitions. [2023-08-29 22:22:02,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:02,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 941 transitions. [2023-08-29 22:22:02,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:02,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:02,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:02,657 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 198 flow. Second operand 3 states and 941 transitions. [2023-08-29 22:22:02,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 338 flow [2023-08-29 22:22:02,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:22:02,659 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 182 flow [2023-08-29 22:22:02,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-29 22:22:02,660 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-29 22:22:02,660 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 182 flow [2023-08-29 22:22:02,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:02,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:02,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:22:02,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:02,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:02,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:02,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1246476, now seen corresponding path program 1 times [2023-08-29 22:22:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282622217] [2023-08-29 22:22:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:02,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:02,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:02,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:22:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:22:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:03,078 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:22:03,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:22:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:03,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:03,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:03,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282622217] [2023-08-29 22:22:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282622217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:03,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:22:03,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:22:03,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367941563] [2023-08-29 22:22:03,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:03,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:05,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 723 [2023-08-29 22:22:05,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:05,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:05,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 723 [2023-08-29 22:22:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:08,952 INFO L130 PetriNetUnfolder]: 13322/18167 cut-off events. [2023-08-29 22:22:08,952 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-08-29 22:22:08,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 18167 events. 13322/18167 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 1680. Compared 97793 event pairs, 10101 based on Foata normal form. 0/4740 useless extension candidates. Maximal degree in co-relation 36531. Up to 6055 conditions per place. [2023-08-29 22:22:09,016 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 185 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2023-08-29 22:22:09,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 212 transitions, 926 flow [2023-08-29 22:22:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:22:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:22:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1871 transitions. [2023-08-29 22:22:09,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43130474873213465 [2023-08-29 22:22:09,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1871 transitions. [2023-08-29 22:22:09,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1871 transitions. [2023-08-29 22:22:09,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:09,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1871 transitions. [2023-08-29 22:22:09,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 311.8333333333333) internal successors, (1871), 6 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:09,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:09,039 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:09,039 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 182 flow. Second operand 6 states and 1871 transitions. [2023-08-29 22:22:09,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 212 transitions, 926 flow [2023-08-29 22:22:09,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 212 transitions, 925 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:09,043 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 385 flow [2023-08-29 22:22:09,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2023-08-29 22:22:09,044 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-29 22:22:09,044 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 385 flow [2023-08-29 22:22:09,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:09,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:09,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:22:09,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:09,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:09,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:09,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:09,255 INFO L85 PathProgramCache]: Analyzing trace with hash 38693201, now seen corresponding path program 1 times [2023-08-29 22:22:09,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:09,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668156004] [2023-08-29 22:22:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:09,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:09,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:09,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:22:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:22:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:09,466 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 22:22:09,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 22:22:09,494 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 22:22:09,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 22:22:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:09,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:22:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:09,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:22:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:09,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:09,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668156004] [2023-08-29 22:22:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668156004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:09,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:22:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454917197] [2023-08-29 22:22:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:09,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:09,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:10,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-29 22:22:10,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:10,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:10,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-29 22:22:10,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:11,564 INFO L130 PetriNetUnfolder]: 10422/14382 cut-off events. [2023-08-29 22:22:11,564 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-08-29 22:22:11,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29043 conditions, 14382 events. 10422/14382 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 76198 event pairs, 7854 based on Foata normal form. 0/4100 useless extension candidates. Maximal degree in co-relation 29030. Up to 14382 conditions per place. [2023-08-29 22:22:11,634 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-29 22:22:11,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 545 flow [2023-08-29 22:22:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-08-29 22:22:11,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442139234670355 [2023-08-29 22:22:11,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-08-29 22:22:11,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-08-29 22:22:11,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:11,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-08-29 22:22:11,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:11,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:11,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:11,649 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 385 flow. Second operand 3 states and 959 transitions. [2023-08-29 22:22:11,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 545 flow [2023-08-29 22:22:11,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 515 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:11,652 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 337 flow [2023-08-29 22:22:11,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2023-08-29 22:22:11,653 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-29 22:22:11,653 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 337 flow [2023-08-29 22:22:11,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:11,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:11,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:22:11,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:11,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:11,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 38693203, now seen corresponding path program 1 times [2023-08-29 22:22:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573077829] [2023-08-29 22:22:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:11,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:11,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:11,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:22:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:22:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:12,063 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 22:22:12,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 22:22:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:12,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:22:12,177 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:22:12,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:22:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:12,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:12,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:12,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573077829] [2023-08-29 22:22:12,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573077829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:12,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:12,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:22:12,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615546952] [2023-08-29 22:22:12,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:12,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:12,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-29 22:22:12,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:12,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:12,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-29 22:22:12,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:13,594 INFO L130 PetriNetUnfolder]: 7522/10597 cut-off events. [2023-08-29 22:22:13,594 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-29 22:22:13,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 10597 events. 7522/10597 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 55265 event pairs, 5607 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 21433. Up to 10597 conditions per place. [2023-08-29 22:22:13,644 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-29 22:22:13,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 489 flow [2023-08-29 22:22:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-08-29 22:22:13,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412171507607192 [2023-08-29 22:22:13,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-08-29 22:22:13,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-08-29 22:22:13,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:13,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-08-29 22:22:13,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:13,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:13,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:13,665 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 337 flow. Second operand 3 states and 957 transitions. [2023-08-29 22:22:13,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 489 flow [2023-08-29 22:22:13,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:13,668 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 318 flow [2023-08-29 22:22:13,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-08-29 22:22:13,671 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-08-29 22:22:13,671 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 318 flow [2023-08-29 22:22:13,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:13,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:13,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:22:13,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:13,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:13,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:13,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511458, now seen corresponding path program 1 times [2023-08-29 22:22:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782584777] [2023-08-29 22:22:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:13,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:13,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:13,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:13,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:22:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:22:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:14,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:14,089 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:22:14,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 22:22:14,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 22:22:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:14,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:22:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:14,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:22:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:14,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:14,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:14,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782584777] [2023-08-29 22:22:14,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782584777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:14,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:14,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:22:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114361218] [2023-08-29 22:22:14,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:14,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:14,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:14,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:14,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-29 22:22:14,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:14,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:14,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-29 22:22:14,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:15,608 INFO L130 PetriNetUnfolder]: 7228/10156 cut-off events. [2023-08-29 22:22:15,609 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-29 22:22:15,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20566 conditions, 10156 events. 7228/10156 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 52631 event pairs, 5376 based on Foata normal form. 0/3386 useless extension candidates. Maximal degree in co-relation 20551. Up to 10156 conditions per place. [2023-08-29 22:22:15,634 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-29 22:22:15,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 482 flow [2023-08-29 22:22:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 955 transitions. [2023-08-29 22:22:15,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44029506685108344 [2023-08-29 22:22:15,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 955 transitions. [2023-08-29 22:22:15,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 955 transitions. [2023-08-29 22:22:15,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:15,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 955 transitions. [2023-08-29 22:22:15,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:15,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:15,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:15,645 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 318 flow. Second operand 3 states and 955 transitions. [2023-08-29 22:22:15,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 482 flow [2023-08-29 22:22:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:15,648 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 315 flow [2023-08-29 22:22:15,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2023-08-29 22:22:15,651 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-08-29 22:22:15,651 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 315 flow [2023-08-29 22:22:15,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:15,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:15,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:22:15,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-29 22:22:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:15,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:15,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511459, now seen corresponding path program 1 times [2023-08-29 22:22:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774356573] [2023-08-29 22:22:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:15,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:15,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:15,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:22:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:22:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:16,021 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 22:22:16,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 22:22:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:22:16,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:22:16,138 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:22:16,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:22:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:16,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:16,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:16,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774356573] [2023-08-29 22:22:16,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774356573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:16,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:16,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:22:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449608028] [2023-08-29 22:22:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:16,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:16,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:16,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-29 22:22:16,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:16,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:16,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-29 22:22:16,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:17,447 INFO L130 PetriNetUnfolder]: 6934/9715 cut-off events. [2023-08-29 22:22:17,447 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-29 22:22:17,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 9715 events. 6934/9715 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 50007 event pairs, 5145 based on Foata normal form. 0/3323 useless extension candidates. Maximal degree in co-relation 19669. Up to 9715 conditions per place. [2023-08-29 22:22:17,474 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-29 22:22:17,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 475 flow [2023-08-29 22:22:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2023-08-29 22:22:17,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43937298294144767 [2023-08-29 22:22:17,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2023-08-29 22:22:17,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2023-08-29 22:22:17,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:17,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2023-08-29 22:22:17,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:17,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:17,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:17,486 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 315 flow. Second operand 3 states and 953 transitions. [2023-08-29 22:22:17,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 475 flow [2023-08-29 22:22:17,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:17,488 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 312 flow [2023-08-29 22:22:17,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-08-29 22:22:17,489 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-08-29 22:22:17,489 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 312 flow [2023-08-29 22:22:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:17,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:17,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:22:17,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:17,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:17,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:17,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511528, now seen corresponding path program 1 times [2023-08-29 22:22:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:17,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428045169] [2023-08-29 22:22:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:17,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:17,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:17,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:22:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:17,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:22:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:17,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:17,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:17,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428045169] [2023-08-29 22:22:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428045169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:22:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632665642] [2023-08-29 22:22:17,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:17,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:18,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 723 [2023-08-29 22:22:18,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:18,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:18,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 723 [2023-08-29 22:22:18,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:19,707 INFO L130 PetriNetUnfolder]: 8918/12752 cut-off events. [2023-08-29 22:22:19,707 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-29 22:22:19,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25858 conditions, 12752 events. 8918/12752 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 70827 event pairs, 6720 based on Foata normal form. 0/4733 useless extension candidates. Maximal degree in co-relation 25841. Up to 9714 conditions per place. [2023-08-29 22:22:19,742 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 138 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-08-29 22:22:19,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 141 transitions, 804 flow [2023-08-29 22:22:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:22:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:22:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1272 transitions. [2023-08-29 22:22:19,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43983402489626555 [2023-08-29 22:22:19,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1272 transitions. [2023-08-29 22:22:19,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1272 transitions. [2023-08-29 22:22:19,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:19,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1272 transitions. [2023-08-29 22:22:19,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,755 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,755 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 312 flow. Second operand 4 states and 1272 transitions. [2023-08-29 22:22:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 141 transitions, 804 flow [2023-08-29 22:22:19,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 141 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:19,758 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 336 flow [2023-08-29 22:22:19,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2023-08-29 22:22:19,759 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-29 22:22:19,759 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 336 flow [2023-08-29 22:22:19,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:19,760 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:22:19,771 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 (9)] Ended with exit code 0 [2023-08-29 22:22:19,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:19,970 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:19,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1516971120, now seen corresponding path program 2 times [2023-08-29 22:22:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:19,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833187980] [2023-08-29 22:22:19,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:22:19,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:19,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:19,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:22:20,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:22:20,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:22:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:22:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:20,172 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:22:20,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:22:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833187980] [2023-08-29 22:22:20,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833187980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:20,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:22:20,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:22:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428846412] [2023-08-29 22:22:20,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:20,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:22:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:22:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:22:28,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 723 [2023-08-29 22:22:28,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 336 flow. Second operand has 12 states, 12 states have (on average 279.0) internal successors, (3348), 12 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:28,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:28,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 723 [2023-08-29 22:22:28,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:30,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:33,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:34,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:38,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:40,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:42,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:44,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:47,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:49,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:58,625 INFO L130 PetriNetUnfolder]: 29696/42436 cut-off events. [2023-08-29 22:22:58,625 INFO L131 PetriNetUnfolder]: For 1941/1941 co-relation queries the response was YES. [2023-08-29 22:22:58,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91608 conditions, 42436 events. 29696/42436 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 261840 event pairs, 22400 based on Foata normal form. 30/16875 useless extension candidates. Maximal degree in co-relation 91589. Up to 5741 conditions per place. [2023-08-29 22:22:58,774 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 518 selfloop transitions, 52 changer transitions 0/570 dead transitions. [2023-08-29 22:22:58,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 570 transitions, 2820 flow [2023-08-29 22:22:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:22:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:22:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3924 transitions. [2023-08-29 22:22:58,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45228215767634855 [2023-08-29 22:22:58,783 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3924 transitions. [2023-08-29 22:22:58,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3924 transitions. [2023-08-29 22:22:58,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:58,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3924 transitions. [2023-08-29 22:22:58,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,802 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,802 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 336 flow. Second operand 12 states and 3924 transitions. [2023-08-29 22:22:58,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 570 transitions, 2820 flow [2023-08-29 22:22:58,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 570 transitions, 2814 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:58,812 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 720 flow [2023-08-29 22:22:58,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=720, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-08-29 22:22:58,813 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-29 22:22:58,814 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 720 flow [2023-08-29 22:22:58,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 279.0) internal successors, (3348), 12 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:58,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:58,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:59,024 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:22:59,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash 264999124, now seen corresponding path program 1 times [2023-08-29 22:22:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:59,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078936439] [2023-08-29 22:22:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:59,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:59,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:59,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:22:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:22:59,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:22:59,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:22:59,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:59,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078936439] [2023-08-29 22:22:59,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078936439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:59,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:59,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634111991] [2023-08-29 22:22:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:59,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:22:59,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:22:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:22:59,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 723 [2023-08-29 22:22:59,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 720 flow. Second operand has 5 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:59,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 723 [2023-08-29 22:22:59,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:07,696 INFO L130 PetriNetUnfolder]: 65938/94842 cut-off events. [2023-08-29 22:23:07,696 INFO L131 PetriNetUnfolder]: For 3912/3912 co-relation queries the response was YES. [2023-08-29 22:23:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203405 conditions, 94842 events. 65938/94842 cut-off events. For 3912/3912 co-relation queries the response was YES. Maximal size of possible extension queue 2819. Compared 675670 event pairs, 32900 based on Foata normal form. 1150/39429 useless extension candidates. Maximal degree in co-relation 203378. Up to 41283 conditions per place. [2023-08-29 22:23:08,193 INFO L137 encePairwiseOnDemand]: 709/723 looper letters, 202 selfloop transitions, 15 changer transitions 0/217 dead transitions. [2023-08-29 22:23:08,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 217 transitions, 1512 flow [2023-08-29 22:23:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:23:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:23:08,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1602 transitions. [2023-08-29 22:23:08,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44315352697095434 [2023-08-29 22:23:08,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1602 transitions. [2023-08-29 22:23:08,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1602 transitions. [2023-08-29 22:23:08,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:08,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1602 transitions. [2023-08-29 22:23:08,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:08,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:08,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:08,204 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 720 flow. Second operand 5 states and 1602 transitions. [2023-08-29 22:23:08,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 217 transitions, 1512 flow [2023-08-29 22:23:08,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 217 transitions, 1395 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-29 22:23:08,221 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 694 flow [2023-08-29 22:23:08,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-29 22:23:08,222 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-08-29 22:23:08,222 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 694 flow [2023-08-29 22:23:08,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:08,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:08,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:08,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:23:08,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:08,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:23:08,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:08,433 INFO L85 PathProgramCache]: Analyzing trace with hash -437028230, now seen corresponding path program 1 times [2023-08-29 22:23:08,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:23:08,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889386028] [2023-08-29 22:23:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:08,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:23:08,435 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:23:08,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:23:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:08,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:23:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:08,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:23:08,613 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:23:08,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:23:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:23:08,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:23:08,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:23:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889386028] [2023-08-29 22:23:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889386028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:23:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:23:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:23:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891730669] [2023-08-29 22:23:08,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:23:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:23:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:23:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:23:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:23:08,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-08-29 22:23:08,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:08,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:08,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-08-29 22:23:08,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:15,270 INFO L130 PetriNetUnfolder]: 52378/75452 cut-off events. [2023-08-29 22:23:15,270 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-08-29 22:23:15,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171442 conditions, 75452 events. 52378/75452 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 516003 event pairs, 39480 based on Foata normal form. 0/34222 useless extension candidates. Maximal degree in co-relation 171412. Up to 75404 conditions per place. [2023-08-29 22:23:15,687 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 98 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2023-08-29 22:23:15,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 898 flow [2023-08-29 22:23:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:23:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:23:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-08-29 22:23:15,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40802213001383125 [2023-08-29 22:23:15,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-08-29 22:23:15,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-08-29 22:23:15,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:15,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-08-29 22:23:15,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:15,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:15,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:15,696 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 694 flow. Second operand 4 states and 1180 transitions. [2023-08-29 22:23:15,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 898 flow [2023-08-29 22:23:15,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 892 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:23:15,708 INFO L231 Difference]: Finished difference. Result has 92 places, 110 transitions, 696 flow [2023-08-29 22:23:15,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=696, PETRI_PLACES=92, PETRI_TRANSITIONS=110} [2023-08-29 22:23:15,708 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-29 22:23:15,708 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 110 transitions, 696 flow [2023-08-29 22:23:15,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:15,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:15,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:15,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-29 22:23:15,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:15,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:23:15,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash -437028231, now seen corresponding path program 1 times [2023-08-29 22:23:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:23:15,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540075882] [2023-08-29 22:23:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:15,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:15,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:23:15,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:23:15,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:23:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:23:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:16,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:23:16,121 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 [2023-08-29 22:23:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:23:16,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:23:16,207 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:23:16,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:23:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:23:16,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:23:20,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:23:20,652 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 55 treesize of output 62 [2023-08-29 22:23:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:23:20,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:23:20,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540075882] [2023-08-29 22:23:20,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540075882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:23:20,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:23:20,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:23:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049466964] [2023-08-29 22:23:20,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:23:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:23:20,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:23:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:23:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:23:25,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 723 [2023-08-29 22:23:25,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 696 flow. Second operand has 10 states, 10 states have (on average 262.6) internal successors, (2626), 10 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:25,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:25,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 723 [2023-08-29 22:23:25,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:49,028 INFO L130 PetriNetUnfolder]: 99424/143497 cut-off events. [2023-08-29 22:23:49,029 INFO L131 PetriNetUnfolder]: For 16651/16651 co-relation queries the response was YES. [2023-08-29 22:23:49,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322686 conditions, 143497 events. 99424/143497 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 4278. Compared 1066088 event pairs, 63490 based on Foata normal form. 0/65888 useless extension candidates. Maximal degree in co-relation 322655. Up to 29326 conditions per place. [2023-08-29 22:23:49,899 INFO L137 encePairwiseOnDemand]: 709/723 looper letters, 727 selfloop transitions, 74 changer transitions 0/801 dead transitions. [2023-08-29 22:23:49,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 801 transitions, 4324 flow [2023-08-29 22:23:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 22:23:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 22:23:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6777 transitions. [2023-08-29 22:23:49,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40754104275663 [2023-08-29 22:23:49,910 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6777 transitions. [2023-08-29 22:23:49,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6777 transitions. [2023-08-29 22:23:49,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:49,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6777 transitions. [2023-08-29 22:23:49,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 294.6521739130435) internal successors, (6777), 23 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:49,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 723.0) internal successors, (17352), 24 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:49,937 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 723.0) internal successors, (17352), 24 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:49,938 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 696 flow. Second operand 23 states and 6777 transitions. [2023-08-29 22:23:49,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 801 transitions, 4324 flow [2023-08-29 22:23:49,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 801 transitions, 4311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:23:49,968 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1177 flow [2023-08-29 22:23:49,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1177, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2023-08-29 22:23:49,968 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 54 predicate places. [2023-08-29 22:23:49,968 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1177 flow [2023-08-29 22:23:49,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 262.6) internal successors, (2626), 10 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:49,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:49,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:49,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:23:50,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:50,180 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:23:50,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash -437028329, now seen corresponding path program 1 times [2023-08-29 22:23:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:23:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457943613] [2023-08-29 22:23:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:50,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:23:50,182 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:23:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:23:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:23:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:50,377 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:23:50,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:23:50,401 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:23:50,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:23:50,418 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:23:50,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:23:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:23:50,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:23:50,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:23:50,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457943613] [2023-08-29 22:23:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457943613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:23:50,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:23:50,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:23:50,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039830569] [2023-08-29 22:23:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:23:50,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:23:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:23:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:23:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:23:50,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-08-29 22:23:50,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1177 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:50,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:50,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-08-29 22:23:50,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:02,559 INFO L130 PetriNetUnfolder]: 77046/111763 cut-off events. [2023-08-29 22:24:02,559 INFO L131 PetriNetUnfolder]: For 146598/146598 co-relation queries the response was YES. [2023-08-29 22:24:03,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282813 conditions, 111763 events. 77046/111763 cut-off events. For 146598/146598 co-relation queries the response was YES. Maximal size of possible extension queue 3299. Compared 811207 event pairs, 56332 based on Foata normal form. 0/56497 useless extension candidates. Maximal degree in co-relation 282766. Up to 111750 conditions per place. [2023-08-29 22:24:03,496 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 128 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2023-08-29 22:24:03,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 140 transitions, 1441 flow [2023-08-29 22:24:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:24:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:24:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1176 transitions. [2023-08-29 22:24:03,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066390041493776 [2023-08-29 22:24:03,499 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1176 transitions. [2023-08-29 22:24:03,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1176 transitions. [2023-08-29 22:24:03,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:03,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1176 transitions. [2023-08-29 22:24:03,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:03,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:03,504 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:03,504 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1177 flow. Second operand 4 states and 1176 transitions. [2023-08-29 22:24:03,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 140 transitions, 1441 flow [2023-08-29 22:24:04,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 140 transitions, 1338 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-29 22:24:04,394 INFO L231 Difference]: Finished difference. Result has 123 places, 140 transitions, 1082 flow [2023-08-29 22:24:04,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1082, PETRI_PLACES=123, PETRI_TRANSITIONS=140} [2023-08-29 22:24:04,395 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2023-08-29 22:24:04,396 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 140 transitions, 1082 flow [2023-08-29 22:24:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:04,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:04,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:24:04,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 22:24:04,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:04,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:24:04,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -117245573, now seen corresponding path program 1 times [2023-08-29 22:24:04,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:04,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846638942] [2023-08-29 22:24:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:24:04,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:04,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:04,603 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:24:04,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 22:24:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:24:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:24:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:04,731 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 [2023-08-29 22:24:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:24:04,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:24:04,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:04,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846638942] [2023-08-29 22:24:04,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846638942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:24:04,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:24:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:24:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160655045] [2023-08-29 22:24:04,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:24:04,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:24:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:24:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:24:05,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 723 [2023-08-29 22:24:05,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 140 transitions, 1082 flow. Second operand has 5 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:05,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:24:05,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 723 [2023-08-29 22:24:05,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:26,044 INFO L130 PetriNetUnfolder]: 138972/201064 cut-off events. [2023-08-29 22:24:26,044 INFO L131 PetriNetUnfolder]: For 284404/284404 co-relation queries the response was YES. [2023-08-29 22:24:27,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505521 conditions, 201064 events. 138972/201064 cut-off events. For 284404/284404 co-relation queries the response was YES. Maximal size of possible extension queue 5585. Compared 1587493 event pairs, 45390 based on Foata normal form. 0/102284 useless extension candidates. Maximal degree in co-relation 505475. Up to 113091 conditions per place. [2023-08-29 22:24:28,023 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 173 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2023-08-29 22:24:28,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 1762 flow [2023-08-29 22:24:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:24:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:24:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1526 transitions. [2023-08-29 22:24:28,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42213001383125864 [2023-08-29 22:24:28,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1526 transitions. [2023-08-29 22:24:28,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1526 transitions. [2023-08-29 22:24:28,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:28,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1526 transitions. [2023-08-29 22:24:28,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:28,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:28,032 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:28,032 INFO L175 Difference]: Start difference. First operand has 123 places, 140 transitions, 1082 flow. Second operand 5 states and 1526 transitions. [2023-08-29 22:24:28,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 1762 flow [2023-08-29 22:24:29,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 196 transitions, 1749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:24:29,468 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1134 flow [2023-08-29 22:24:29,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1134, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2023-08-29 22:24:29,469 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 52 predicate places. [2023-08-29 22:24:29,469 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1134 flow [2023-08-29 22:24:29,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:29,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:29,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:24:29,477 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 [2023-08-29 22:24:29,672 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 [2023-08-29 22:24:29,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:24:29,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -117245571, now seen corresponding path program 1 times [2023-08-29 22:24:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158093325] [2023-08-29 22:24:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:24:29,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:29,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:29,674 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) [2023-08-29 22:24:29,677 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 [2023-08-29 22:24:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:24:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:24:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:29,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:24:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:24:29,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:24:29,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158093325] [2023-08-29 22:24:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158093325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:24:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:24:29,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:24:29,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817532897] [2023-08-29 22:24:29,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:24:29,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:24:29,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:24:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:24:30,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-08-29 22:24:30,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1134 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:30,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:24:30,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-08-29 22:24:30,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:44,763 INFO L130 PetriNetUnfolder]: 97742/141494 cut-off events. [2023-08-29 22:24:44,764 INFO L131 PetriNetUnfolder]: For 203534/203534 co-relation queries the response was YES. [2023-08-29 22:24:45,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374152 conditions, 141494 events. 97742/141494 cut-off events. For 203534/203534 co-relation queries the response was YES. Maximal size of possible extension queue 3930. Compared 1053413 event pairs, 70440 based on Foata normal form. 0/89094 useless extension candidates. Maximal degree in co-relation 374105. Up to 141328 conditions per place. [2023-08-29 22:24:46,037 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 126 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2023-08-29 22:24:46,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1400 flow [2023-08-29 22:24:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:24:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:24:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1172 transitions. [2023-08-29 22:24:46,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40525587828492393 [2023-08-29 22:24:46,041 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1172 transitions. [2023-08-29 22:24:46,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1172 transitions. [2023-08-29 22:24:46,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:46,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1172 transitions. [2023-08-29 22:24:46,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:46,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:46,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:46,045 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1134 flow. Second operand 4 states and 1172 transitions. [2023-08-29 22:24:46,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1400 flow [2023-08-29 22:24:47,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1365 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:24:47,270 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1113 flow [2023-08-29 22:24:47,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1113, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2023-08-29 22:24:47,270 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 48 predicate places. [2023-08-29 22:24:47,270 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1113 flow [2023-08-29 22:24:47,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:47,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:47,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:24:47,277 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 [2023-08-29 22:24:47,471 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 [2023-08-29 22:24:47,471 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-29 22:24:47,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash -437028328, now seen corresponding path program 1 times [2023-08-29 22:24:47,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:47,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102184618] [2023-08-29 22:24:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:24:47,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:47,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:47,473 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) [2023-08-29 22:24:47,473 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 [2023-08-29 22:24:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:24:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:24:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:47,714 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:24:47,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:24:47,803 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:24:47,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:24:47,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:24:47,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:24:47,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:24:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:24:47,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:24:48,003 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:24:48,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:24:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:24:48,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:24:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:24:56,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:56,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102184618] [2023-08-29 22:24:56,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102184618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:24:56,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:24:56,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:24:56,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939391474] [2023-08-29 22:24:56,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:24:56,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:24:56,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:24:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2023-08-29 22:24:58,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:01,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:04,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:06,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:09,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:11,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:13,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:15,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:17,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:20,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:22,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:25,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:27,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:30,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:33,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:35,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:39,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:41,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:44,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:46,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:49,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:51,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 22:25:51,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 723 [2023-08-29 22:25:51,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1113 flow. Second operand has 10 states, 10 states have (on average 227.6) internal successors, (2276), 10 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:51,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:25:51,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 723 [2023-08-29 22:25:51,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:26:04,028 WARN L222 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:26:11,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]