./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.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/parallel-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:24:03,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:24:03,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:24:03,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:24:03,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:24:03,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:24:03,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:24:03,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:24:03,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:24:03,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:24:03,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:24:03,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:24:03,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:24:03,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:24:03,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:24:03,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:24:03,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:24:03,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:24:03,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:24:03,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:24:03,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:24:03,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:24:03,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:24:03,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:24:03,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:24:03,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:24:03,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:24:03,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:24:03,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:24:03,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:24:03,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:24:03,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:24:03,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:24:03,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:24:03,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:24:03,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:24:03,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:24:03,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:24:03,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:24:03,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:24:03,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:24:03,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:24:03,697 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:24:03,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:24:03,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:24:03,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:24:03,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:24:03,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:24:03,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:24:03,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:24:03,700 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:24:03,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:24:03,701 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:24:03,701 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:24:03,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:24:03,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:24:03,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:24:03,702 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:24:03,702 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:24:03,702 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:24:03,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:24:03,703 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:24:03,703 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:24:03,703 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:24:03,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:24:03,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:24:03,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:24:03,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:24:03,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:24:03,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:24:03,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:24:03,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:24:03,705 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:24:03,705 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:24:03,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:24:03,706 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:24:03,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:24:04,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:24:04,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:24:04,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:24:04,052 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:24:04,052 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:24:04,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-29 23:24:05,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:24:05,454 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:24:05,454 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-29 23:24:05,459 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4642eeb3f/18138e30a0574304a315642e122837d1/FLAG0d0f2c9fa [2023-08-29 23:24:05,471 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4642eeb3f/18138e30a0574304a315642e122837d1 [2023-08-29 23:24:05,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:24:05,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:24:05,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:05,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:24:05,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:24:05,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:05" (1/1) ... [2023-08-29 23:24:05,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d2b5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:05, skipping insertion in model container [2023-08-29 23:24:05,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:05" (1/1) ... [2023-08-29 23:24:05,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:24:05,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:24:05,633 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/parallel-lamport.wvr.c[4210,4223] [2023-08-29 23:24:05,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:05,651 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:24:05,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@594ea5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:05, skipping insertion in model container [2023-08-29 23:24:05,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:05,652 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:24:05,654 INFO L158 Benchmark]: Toolchain (without parser) took 179.65ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 31.1MB in the beginning and 57.5MB in the end (delta: -26.4MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2023-08-29 23:24:05,654 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:24:05,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.89ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 31.0MB in the beginning and 57.5MB in the end (delta: -26.6MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2023-08-29 23:24:05,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.89ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 31.0MB in the beginning and 57.5MB in the end (delta: -26.6MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 170]: 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/parallel-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:24:07,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:24:07,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:24:07,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:24:07,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:24:07,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:24:07,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:24:07,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:24:07,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:24:07,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:24:07,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:24:07,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:24:07,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:24:07,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:24:07,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:24:07,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:24:07,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:24:07,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:24:07,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:24:07,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:24:07,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:24:07,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:24:07,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:24:07,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:24:07,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:24:07,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:24:07,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:24:07,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:24:07,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:24:07,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:24:07,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:24:07,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:24:07,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:24:07,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:24:07,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:24:07,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:24:07,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:24:07,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:24:07,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:24:07,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:24:07,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:24:07,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:24:07,433 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:24:07,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:24:07,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:24:07,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:24:07,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:24:07,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:24:07,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:24:07,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:24:07,436 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:24:07,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:24:07,437 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:24:07,437 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:24:07,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:24:07,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:24:07,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:24:07,438 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:24:07,438 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:24:07,439 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:24:07,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:24:07,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:24:07,439 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:24:07,439 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:24:07,439 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:24:07,440 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:24:07,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:24:07,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:24:07,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:24:07,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:24:07,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:24:07,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:24:07,441 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:24:07,441 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:24:07,442 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:24:07,442 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:24:07,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:24:07,442 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:24:07,442 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:24:07,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:24:07,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:24:07,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:24:07,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:24:07,788 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:24:07,789 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:24:07,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-29 23:24:09,028 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:24:09,247 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:24:09,248 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-29 23:24:09,255 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a88c7606/ecfa5aebf36946c3abbc377548b2ec44/FLAGc3de34125 [2023-08-29 23:24:09,272 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a88c7606/ecfa5aebf36946c3abbc377548b2ec44 [2023-08-29 23:24:09,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:24:09,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:24:09,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:09,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:24:09,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:24:09,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59afdaf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09, skipping insertion in model container [2023-08-29 23:24:09,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:24:09,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:24:09,509 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/parallel-lamport.wvr.c[4210,4223] [2023-08-29 23:24:09,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:09,545 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:24:09,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:24:09,583 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/parallel-lamport.wvr.c[4210,4223] [2023-08-29 23:24:09,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:09,597 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:24:09,632 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/parallel-lamport.wvr.c[4210,4223] [2023-08-29 23:24:09,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:09,650 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:24:09,651 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:24:09,657 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:24:09,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09 WrapperNode [2023-08-29 23:24:09,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:09,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:24:09,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:24:09,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:24:09,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,713 INFO L138 Inliner]: procedures = 27, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 235 [2023-08-29 23:24:09,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:24:09,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:24:09,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:24:09,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:24:09,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:24:09,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:24:09,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:24:09,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:24:09,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (1/1) ... [2023-08-29 23:24:09,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:24:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:24:09,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:24:09,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:24:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:24:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:24:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:24:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:24:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:24:09,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:24:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:24:09,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:24:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:24:09,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:24:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:24:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:24:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:24:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:24:09,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:24:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:24:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:24:09,887 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:24:10,006 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:24:10,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:24:10,605 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:24:10,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:24:10,682 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-29 23:24:10,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:24:10 BoogieIcfgContainer [2023-08-29 23:24:10,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:24:10,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:24:10,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:24:10,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:24:10,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:24:09" (1/3) ... [2023-08-29 23:24:10,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e617926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:24:10, skipping insertion in model container [2023-08-29 23:24:10,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:09" (2/3) ... [2023-08-29 23:24:10,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e617926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:24:10, skipping insertion in model container [2023-08-29 23:24:10,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:24:10" (3/3) ... [2023-08-29 23:24:10,694 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-08-29 23:24:10,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:24:10,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-08-29 23:24:10,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:24:10,766 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:24:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 198 transitions, 420 flow [2023-08-29 23:24:10,902 INFO L130 PetriNetUnfolder]: 7/195 cut-off events. [2023-08-29 23:24:10,902 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:24:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 7/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-29 23:24:10,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 198 transitions, 420 flow [2023-08-29 23:24:10,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 191 transitions, 400 flow [2023-08-29 23:24:10,914 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:24:10,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 191 transitions, 400 flow [2023-08-29 23:24:10,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 191 transitions, 400 flow [2023-08-29 23:24:10,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 191 transitions, 400 flow [2023-08-29 23:24:10,954 INFO L130 PetriNetUnfolder]: 7/191 cut-off events. [2023-08-29 23:24:10,954 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:24:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 7/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-29 23:24:10,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 2258 [2023-08-29 23:24:25,879 INFO L134 LiptonReduction]: Checked pairs total: 14821 [2023-08-29 23:24:25,879 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-29 23:24:25,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:24:25,897 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;@34ccdf64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:24:25,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-08-29 23:24:25,900 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:24:25,900 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:24:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:24:25,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:25,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash 25599, now seen corresponding path program 1 times [2023-08-29 23:24:25,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:25,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841276340] [2023-08-29 23:24:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:25,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:25,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:24:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:24:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:26,200 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:26,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:26,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:26,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:26,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841276340] [2023-08-29 23:24:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841276340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:26,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264407552] [2023-08-29 23:24:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:26,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:26,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-29 23:24:26,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:26,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:26,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-29 23:24:26,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:27,811 INFO L130 PetriNetUnfolder]: 4595/7242 cut-off events. [2023-08-29 23:24:27,811 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2023-08-29 23:24:27,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14533 conditions, 7242 events. 4595/7242 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45579 event pairs, 4594 based on Foata normal form. 0/4854 useless extension candidates. Maximal degree in co-relation 6688. Up to 3471 conditions per place. [2023-08-29 23:24:27,874 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 86 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-29 23:24:27,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 412 flow [2023-08-29 23:24:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-29 23:24:27,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2023-08-29 23:24:27,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-29 23:24:27,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-29 23:24:27,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:27,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-29 23:24:27,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:27,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:27,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:27,917 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 136 flow. Second operand 3 states and 594 transitions. [2023-08-29 23:24:27,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 412 flow [2023-08-29 23:24:27,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 388 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:24:27,926 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 132 flow [2023-08-29 23:24:27,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-29 23:24:27,931 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-29 23:24:27,932 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 132 flow [2023-08-29 23:24:27,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:27,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:27,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:24:27,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:28,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:28,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:28,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash 25664, now seen corresponding path program 1 times [2023-08-29 23:24:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:28,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348600024] [2023-08-29 23:24:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:28,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:28,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:28,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:24:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:24:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:28,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:28,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:28,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348600024] [2023-08-29 23:24:28,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348600024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:28,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:28,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861538297] [2023-08-29 23:24:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:28,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:28,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 375 [2023-08-29 23:24:28,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:28,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 375 [2023-08-29 23:24:28,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:28,814 INFO L130 PetriNetUnfolder]: 2298/3624 cut-off events. [2023-08-29 23:24:28,815 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:24:28,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7178 conditions, 3624 events. 2298/3624 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20241 event pairs, 2297 based on Foata normal form. 0/2430 useless extension candidates. Maximal degree in co-relation 7165. Up to 3471 conditions per place. [2023-08-29 23:24:28,834 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-29 23:24:28,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 228 flow [2023-08-29 23:24:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-29 23:24:28,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951111111111111 [2023-08-29 23:24:28,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-29 23:24:28,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-29 23:24:28,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:28,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-29 23:24:28,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,843 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 132 flow. Second operand 3 states and 557 transitions. [2023-08-29 23:24:28,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 228 flow [2023-08-29 23:24:28,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:28,845 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 142 flow [2023-08-29 23:24:28,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-29 23:24:28,846 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-08-29 23:24:28,846 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 142 flow [2023-08-29 23:24:28,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:28,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:24:28,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:29,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:29,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:29,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:29,057 INFO L85 PathProgramCache]: Analyzing trace with hash 25598, now seen corresponding path program 1 times [2023-08-29 23:24:29,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:29,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031256059] [2023-08-29 23:24:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:29,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:29,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:29,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:24:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:24:29,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:29,177 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:24:29,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:24:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:29,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:29,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031256059] [2023-08-29 23:24:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031256059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617019819] [2023-08-29 23:24:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:29,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:29,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-29 23:24:29,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:29,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-29 23:24:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:29,836 INFO L130 PetriNetUnfolder]: 2298/3622 cut-off events. [2023-08-29 23:24:29,836 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:24:29,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7180 conditions, 3622 events. 2298/3622 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20193 event pairs, 2297 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 7166. Up to 3470 conditions per place. [2023-08-29 23:24:29,855 INFO L137 encePairwiseOnDemand]: 373/375 looper letters, 44 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-29 23:24:29,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 230 flow [2023-08-29 23:24:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-29 23:24:29,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48533333333333334 [2023-08-29 23:24:29,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-29 23:24:29,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-29 23:24:29,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:29,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-29 23:24:29,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,863 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 142 flow. Second operand 3 states and 546 transitions. [2023-08-29 23:24:29,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 230 flow [2023-08-29 23:24:29,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 224 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:29,865 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 136 flow [2023-08-29 23:24:29,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-29 23:24:29,866 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2023-08-29 23:24:29,866 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 136 flow [2023-08-29 23:24:29,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:29,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:29,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:30,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:30,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:30,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash 795236, now seen corresponding path program 1 times [2023-08-29 23:24:30,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:30,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520798663] [2023-08-29 23:24:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:30,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:30,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:30,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:24:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:24:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:30,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:30,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:30,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:30,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520798663] [2023-08-29 23:24:30,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520798663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:30,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:30,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:24:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3759501] [2023-08-29 23:24:30,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:31,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-08-29 23:24:31,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:31,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:31,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-08-29 23:24:31,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:32,725 INFO L130 PetriNetUnfolder]: 4601/7249 cut-off events. [2023-08-29 23:24:32,725 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 23:24:32,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14365 conditions, 7249 events. 4601/7249 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45602 event pairs, 4594 based on Foata normal form. 0/4861 useless extension candidates. Maximal degree in co-relation 14356. Up to 3473 conditions per place. [2023-08-29 23:24:32,759 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 84 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-08-29 23:24:32,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 456 flow [2023-08-29 23:24:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:24:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:24:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2023-08-29 23:24:32,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2023-08-29 23:24:32,764 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2023-08-29 23:24:32,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2023-08-29 23:24:32,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:32,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2023-08-29 23:24:32,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:32,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:32,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:32,773 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 136 flow. Second operand 6 states and 1070 transitions. [2023-08-29 23:24:32,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 456 flow [2023-08-29 23:24:32,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:32,778 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 233 flow [2023-08-29 23:24:32,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2023-08-29 23:24:32,779 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-29 23:24:32,779 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 233 flow [2023-08-29 23:24:32,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:32,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:32,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:32,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:32,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:32,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:32,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 795301, now seen corresponding path program 1 times [2023-08-29 23:24:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:32,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115113419] [2023-08-29 23:24:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:32,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:32,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:32,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:24:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:33,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:24:33,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:33,155 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-29 23:24:33,155 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 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-29 23:24:33,175 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:24:33,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:24:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:33,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:33,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115113419] [2023-08-29 23:24:33,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115113419] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:24:33,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:24:33,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-29 23:24:33,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873206611] [2023-08-29 23:24:33,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:33,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:24:33,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:24:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:33,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-08-29 23:24:33,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:33,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:33,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-08-29 23:24:33,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:34,423 INFO L130 PetriNetUnfolder]: 3671/5885 cut-off events. [2023-08-29 23:24:34,423 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 23:24:34,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 5885 events. 3671/5885 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36598 event pairs, 3666 based on Foata normal form. 0/4113 useless extension candidates. Maximal degree in co-relation 11699. Up to 5629 conditions per place. [2023-08-29 23:24:34,455 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 49 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-29 23:24:34,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 307 flow [2023-08-29 23:24:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-29 23:24:34,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631111111111111 [2023-08-29 23:24:34,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-29 23:24:34,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-29 23:24:34,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:34,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-29 23:24:34,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:34,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:34,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:34,464 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 233 flow. Second operand 3 states and 521 transitions. [2023-08-29 23:24:34,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 307 flow [2023-08-29 23:24:34,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 289 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:34,466 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 191 flow [2023-08-29 23:24:34,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-29 23:24:34,467 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-29 23:24:34,468 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 191 flow [2023-08-29 23:24:34,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:34,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:34,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:34,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:34,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:34,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:34,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:34,679 INFO L85 PathProgramCache]: Analyzing trace with hash 795300, now seen corresponding path program 1 times [2023-08-29 23:24:34,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:34,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515097342] [2023-08-29 23:24:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:34,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:34,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:34,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:34,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:24:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:24:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:34,832 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-29 23:24:34,832 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 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-29 23:24:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:34,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:34,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:34,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515097342] [2023-08-29 23:24:34,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515097342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:34,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:34,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:34,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514364165] [2023-08-29 23:24:34,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:34,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:34,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:35,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-29 23:24:35,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:35,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:35,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-29 23:24:35,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:35,643 INFO L130 PetriNetUnfolder]: 2741/4521 cut-off events. [2023-08-29 23:24:35,643 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 23:24:35,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9016 conditions, 4521 events. 2741/4521 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27723 event pairs, 2738 based on Foata normal form. 0/3365 useless extension candidates. Maximal degree in co-relation 9001. Up to 4313 conditions per place. [2023-08-29 23:24:35,671 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 45 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-29 23:24:35,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 58 transitions, 261 flow [2023-08-29 23:24:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-29 23:24:35,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826666666666667 [2023-08-29 23:24:35,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-29 23:24:35,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-29 23:24:35,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:35,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-29 23:24:35,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:35,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:35,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:35,679 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 191 flow. Second operand 3 states and 543 transitions. [2023-08-29 23:24:35,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 58 transitions, 261 flow [2023-08-29 23:24:35,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 58 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:35,681 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 170 flow [2023-08-29 23:24:35,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-08-29 23:24:35,682 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-29 23:24:35,682 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 170 flow [2023-08-29 23:24:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:35,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:35,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:24:35,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:35,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:35,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:35,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash 764301307, now seen corresponding path program 1 times [2023-08-29 23:24:35,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011258345] [2023-08-29 23:24:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:35,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:35,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:24:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:24:35,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:36,089 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-29 23:24:36,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-29 23:24:36,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 23:24:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:36,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:36,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011258345] [2023-08-29 23:24:36,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011258345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:36,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:36,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:24:36,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234807005] [2023-08-29 23:24:36,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:36,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:37,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-29 23:24:37,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:37,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:37,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-29 23:24:37,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:37,965 INFO L130 PetriNetUnfolder]: 2653/4367 cut-off events. [2023-08-29 23:24:37,965 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 23:24:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8711 conditions, 4367 events. 2653/4367 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26631 event pairs, 2650 based on Foata normal form. 0/3302 useless extension candidates. Maximal degree in co-relation 8695. Up to 2083 conditions per place. [2023-08-29 23:24:37,989 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 76 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-29 23:24:37,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 406 flow [2023-08-29 23:24:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2023-08-29 23:24:37,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634666666666667 [2023-08-29 23:24:37,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2023-08-29 23:24:37,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2023-08-29 23:24:37,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:37,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2023-08-29 23:24:38,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,003 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 170 flow. Second operand 5 states and 869 transitions. [2023-08-29 23:24:38,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 406 flow [2023-08-29 23:24:38,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:38,007 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 171 flow [2023-08-29 23:24:38,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-08-29 23:24:38,008 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-29 23:24:38,008 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 171 flow [2023-08-29 23:24:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:38,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:24:38,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:38,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:38,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:38,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 764301306, now seen corresponding path program 1 times [2023-08-29 23:24:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:38,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594906871] [2023-08-29 23:24:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:38,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:38,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:38,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:38,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:24:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:24:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:38,369 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:24:38,369 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-29 23:24:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:38,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:38,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:38,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594906871] [2023-08-29 23:24:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594906871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187704942] [2023-08-29 23:24:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:38,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:38,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-29 23:24:38,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:38,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-29 23:24:38,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:38,960 INFO L130 PetriNetUnfolder]: 2565/4213 cut-off events. [2023-08-29 23:24:38,960 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 23:24:38,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8408 conditions, 4213 events. 2565/4213 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25679 event pairs, 2562 based on Foata normal form. 0/3237 useless extension candidates. Maximal degree in co-relation 8391. Up to 4009 conditions per place. [2023-08-29 23:24:38,976 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 41 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-29 23:24:38,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 54 transitions, 251 flow [2023-08-29 23:24:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-29 23:24:38,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791111111111111 [2023-08-29 23:24:38,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-29 23:24:38,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-29 23:24:38,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:38,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-29 23:24:38,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,983 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 171 flow. Second operand 3 states and 539 transitions. [2023-08-29 23:24:38,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 54 transitions, 251 flow [2023-08-29 23:24:38,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:38,985 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 164 flow [2023-08-29 23:24:38,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2023-08-29 23:24:38,987 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-29 23:24:38,987 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 164 flow [2023-08-29 23:24:38,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:38,987 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:24:38,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:39,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:39,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:39,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2077272769, now seen corresponding path program 2 times [2023-08-29 23:24:39,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:39,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879312560] [2023-08-29 23:24:39,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:24:39,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:39,203 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:39,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:24:39,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:24:39,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:24:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:24:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:39,378 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:39,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:39,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:40,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:40,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879312560] [2023-08-29 23:24:40,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879312560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:40,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:40,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:24:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842563832] [2023-08-29 23:24:40,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:40,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:24:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:24:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:24:43,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-29 23:24:43,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 164 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:43,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:43,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-29 23:24:43,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:47,407 INFO L130 PetriNetUnfolder]: 11531/18932 cut-off events. [2023-08-29 23:24:47,407 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-08-29 23:24:47,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37666 conditions, 18932 events. 11531/18932 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 144722 event pairs, 11529 based on Foata normal form. 6/14554 useless extension candidates. Maximal degree in co-relation 37649. Up to 2002 conditions per place. [2023-08-29 23:24:47,505 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 299 selfloop transitions, 12 changer transitions 0/323 dead transitions. [2023-08-29 23:24:47,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 323 transitions, 1426 flow [2023-08-29 23:24:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:24:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:24:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2273 transitions. [2023-08-29 23:24:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051111111111111 [2023-08-29 23:24:47,513 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2273 transitions. [2023-08-29 23:24:47,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2273 transitions. [2023-08-29 23:24:47,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:47,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2273 transitions. [2023-08-29 23:24:47,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.41666666666666) internal successors, (2273), 12 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:47,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:47,527 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:47,527 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 164 flow. Second operand 12 states and 2273 transitions. [2023-08-29 23:24:47,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 323 transitions, 1426 flow [2023-08-29 23:24:47,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 323 transitions, 1425 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:47,532 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 261 flow [2023-08-29 23:24:47,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=261, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2023-08-29 23:24:47,532 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-08-29 23:24:47,533 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 261 flow [2023-08-29 23:24:47,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:47,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:47,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:47,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:47,745 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:47,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 54165560, now seen corresponding path program 1 times [2023-08-29 23:24:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326568253] [2023-08-29 23:24:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:47,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:47,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:47,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:24:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:24:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:47,906 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:24:47,906 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 29 [2023-08-29 23:24:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:47,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:47,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:47,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326568253] [2023-08-29 23:24:47,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326568253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:47,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:47,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:47,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818777727] [2023-08-29 23:24:47,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:47,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:47,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:47,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 375 [2023-08-29 23:24:47,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:47,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:47,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 375 [2023-08-29 23:24:47,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:49,553 INFO L130 PetriNetUnfolder]: 10505/17231 cut-off events. [2023-08-29 23:24:49,553 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-29 23:24:49,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34375 conditions, 17231 events. 10505/17231 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 130342 event pairs, 10503 based on Foata normal form. 0/13649 useless extension candidates. Maximal degree in co-relation 34350. Up to 16385 conditions per place. [2023-08-29 23:24:49,619 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 46 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-29 23:24:49,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 59 transitions, 351 flow [2023-08-29 23:24:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-29 23:24:49,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693333333333333 [2023-08-29 23:24:49,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-29 23:24:49,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-29 23:24:49,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:49,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-29 23:24:49,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:49,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:49,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:49,626 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 261 flow. Second operand 3 states and 528 transitions. [2023-08-29 23:24:49,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 59 transitions, 351 flow [2023-08-29 23:24:49,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 59 transitions, 326 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 23:24:49,628 INFO L231 Difference]: Finished difference. Result has 81 places, 59 transitions, 234 flow [2023-08-29 23:24:49,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=81, PETRI_TRANSITIONS=59} [2023-08-29 23:24:49,629 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2023-08-29 23:24:49,629 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 59 transitions, 234 flow [2023-08-29 23:24:49,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:49,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:49,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:49,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:49,839 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:49,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash 54165561, now seen corresponding path program 1 times [2023-08-29 23:24:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:49,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943314707] [2023-08-29 23:24:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:49,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:49,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:49,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:24:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:24:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:50,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:50,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:50,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943314707] [2023-08-29 23:24:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943314707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:50,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:50,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:24:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307963832] [2023-08-29 23:24:50,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:50,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:51,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-29 23:24:51,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 59 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:51,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:51,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-29 23:24:51,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:52,673 INFO L130 PetriNetUnfolder]: 9479/15530 cut-off events. [2023-08-29 23:24:52,673 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-29 23:24:52,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31028 conditions, 15530 events. 9479/15530 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 115673 event pairs, 9477 based on Foata normal form. 0/12766 useless extension candidates. Maximal degree in co-relation 31002. Up to 13116 conditions per place. [2023-08-29 23:24:52,759 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 71 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-29 23:24:52,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 448 flow [2023-08-29 23:24:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2023-08-29 23:24:52,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570666666666667 [2023-08-29 23:24:52,763 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2023-08-29 23:24:52,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2023-08-29 23:24:52,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:52,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2023-08-29 23:24:52,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:52,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:52,768 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:52,768 INFO L175 Difference]: Start difference. First operand has 81 places, 59 transitions, 234 flow. Second operand 5 states and 857 transitions. [2023-08-29 23:24:52,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 448 flow [2023-08-29 23:24:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:52,771 INFO L231 Difference]: Finished difference. Result has 82 places, 57 transitions, 235 flow [2023-08-29 23:24:52,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=82, PETRI_TRANSITIONS=57} [2023-08-29 23:24:52,772 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2023-08-29 23:24:52,772 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 57 transitions, 235 flow [2023-08-29 23:24:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:52,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:52,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:52,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:52,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:52,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash 513513515, now seen corresponding path program 1 times [2023-08-29 23:24:52,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:52,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854047059] [2023-08-29 23:24:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:52,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:52,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:52,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:52,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:24:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:53,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:24:53,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:53,143 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:24:53,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:24:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:53,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:53,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:53,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854047059] [2023-08-29 23:24:53,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854047059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:53,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139636221] [2023-08-29 23:24:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:24:53,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:24:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:24:53,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 375 [2023-08-29 23:24:53,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 57 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:53,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:53,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 375 [2023-08-29 23:24:53,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:54,395 INFO L130 PetriNetUnfolder]: 7220/12011 cut-off events. [2023-08-29 23:24:54,395 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-29 23:24:54,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23957 conditions, 12011 events. 7220/12011 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 88230 event pairs, 7218 based on Foata normal form. 0/10805 useless extension candidates. Maximal degree in co-relation 23930. Up to 11332 conditions per place. [2023-08-29 23:24:54,443 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-08-29 23:24:54,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 54 transitions, 315 flow [2023-08-29 23:24:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:24:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:24:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 677 transitions. [2023-08-29 23:24:54,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513333333333333 [2023-08-29 23:24:54,445 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 677 transitions. [2023-08-29 23:24:54,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 677 transitions. [2023-08-29 23:24:54,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:54,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 677 transitions. [2023-08-29 23:24:54,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:54,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:54,449 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:54,450 INFO L175 Difference]: Start difference. First operand has 82 places, 57 transitions, 235 flow. Second operand 4 states and 677 transitions. [2023-08-29 23:24:54,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 54 transitions, 315 flow [2023-08-29 23:24:54,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 54 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:54,452 INFO L231 Difference]: Finished difference. Result has 79 places, 54 transitions, 234 flow [2023-08-29 23:24:54,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=79, PETRI_TRANSITIONS=54} [2023-08-29 23:24:54,453 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 11 predicate places. [2023-08-29 23:24:54,453 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 54 transitions, 234 flow [2023-08-29 23:24:54,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:54,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:54,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:54,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:54,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:54,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:24:54,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash 513513516, now seen corresponding path program 1 times [2023-08-29 23:24:54,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:54,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790514100] [2023-08-29 23:24:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:54,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:54,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:54,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:24:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:54,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:24:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:54,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:54,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:55,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:55,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790514100] [2023-08-29 23:24:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790514100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:55,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:55,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:24:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005198704] [2023-08-29 23:24:55,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:55,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:57,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-08-29 23:24:57,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 54 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:57,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:57,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-08-29 23:24:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:00,327 INFO L130 PetriNetUnfolder]: 8690/14223 cut-off events. [2023-08-29 23:25:00,327 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-29 23:25:00,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28332 conditions, 14223 events. 8690/14223 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 104930 event pairs, 7463 based on Foata normal form. 0/12331 useless extension candidates. Maximal degree in co-relation 28305. Up to 9709 conditions per place. [2023-08-29 23:25:00,382 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 117 selfloop transitions, 14 changer transitions 0/141 dead transitions. [2023-08-29 23:25:00,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 141 transitions, 694 flow [2023-08-29 23:25:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:25:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:25:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1521 transitions. [2023-08-29 23:25:00,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45066666666666666 [2023-08-29 23:25:00,386 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1521 transitions. [2023-08-29 23:25:00,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1521 transitions. [2023-08-29 23:25:00,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:00,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1521 transitions. [2023-08-29 23:25:00,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:00,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:00,394 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:00,394 INFO L175 Difference]: Start difference. First operand has 79 places, 54 transitions, 234 flow. Second operand 9 states and 1521 transitions. [2023-08-29 23:25:00,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 141 transitions, 694 flow [2023-08-29 23:25:00,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 141 transitions, 687 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:25:00,397 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 285 flow [2023-08-29 23:25:00,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=285, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2023-08-29 23:25:00,398 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-29 23:25:00,398 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 285 flow [2023-08-29 23:25:00,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:00,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:00,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:00,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:00,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:00,608 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:25:00,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 513513647, now seen corresponding path program 1 times [2023-08-29 23:25:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:00,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602967875] [2023-08-29 23:25:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:25:00,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:00,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:00,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:00,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:25:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:25:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:25:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:00,814 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:00,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:25:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:01,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602967875] [2023-08-29 23:25:01,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602967875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:25:01,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:25:01,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:25:01,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128229069] [2023-08-29 23:25:01,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:25:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:25:01,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:25:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:25:04,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-29 23:25:04,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 285 flow. Second operand has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:04,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:04,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-29 23:25:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:09,024 INFO L130 PetriNetUnfolder]: 6485/10880 cut-off events. [2023-08-29 23:25:09,025 INFO L131 PetriNetUnfolder]: For 1911/2571 co-relation queries the response was YES. [2023-08-29 23:25:09,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23761 conditions, 10880 events. 6485/10880 cut-off events. For 1911/2571 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 79527 event pairs, 6483 based on Foata normal form. 114/10828 useless extension candidates. Maximal degree in co-relation 23732. Up to 7555 conditions per place. [2023-08-29 23:25:09,068 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 83 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-29 23:25:09,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 105 transitions, 575 flow [2023-08-29 23:25:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:25:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:25:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1511 transitions. [2023-08-29 23:25:09,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477037037037037 [2023-08-29 23:25:09,073 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1511 transitions. [2023-08-29 23:25:09,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1511 transitions. [2023-08-29 23:25:09,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:09,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1511 transitions. [2023-08-29 23:25:09,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.88888888888889) internal successors, (1511), 9 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:09,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:09,078 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:09,078 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 285 flow. Second operand 9 states and 1511 transitions. [2023-08-29 23:25:09,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 105 transitions, 575 flow [2023-08-29 23:25:09,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 105 transitions, 531 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-29 23:25:09,084 INFO L231 Difference]: Finished difference. Result has 87 places, 56 transitions, 253 flow [2023-08-29 23:25:09,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=87, PETRI_TRANSITIONS=56} [2023-08-29 23:25:09,084 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-29 23:25:09,085 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 56 transitions, 253 flow [2023-08-29 23:25:09,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:09,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:09,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:09,096 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 23:25:09,294 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 23:25:09,295 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:25:09,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1109925785, now seen corresponding path program 1 times [2023-08-29 23:25:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:09,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683517689] [2023-08-29 23:25:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:25:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:09,297 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 23:25:09,299 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 23:25:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:25:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:25:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:09,477 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:09,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:09,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:25:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:10,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683517689] [2023-08-29 23:25:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683517689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:25:10,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:25:10,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:25:10,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024679581] [2023-08-29 23:25:10,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:25:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:25:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:25:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:25:12,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-08-29 23:25:12,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 56 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 158.75) internal successors, (1270), 8 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:12,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:12,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-08-29 23:25:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:15,431 INFO L130 PetriNetUnfolder]: 6227/10454 cut-off events. [2023-08-29 23:25:15,432 INFO L131 PetriNetUnfolder]: For 1740/2400 co-relation queries the response was YES. [2023-08-29 23:25:15,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22837 conditions, 10454 events. 6227/10454 cut-off events. For 1740/2400 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 75596 event pairs, 5271 based on Foata normal form. 114/10411 useless extension candidates. Maximal degree in co-relation 22812. Up to 7555 conditions per place. [2023-08-29 23:25:15,481 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 103 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2023-08-29 23:25:15,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 658 flow [2023-08-29 23:25:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:25:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:25:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1528 transitions. [2023-08-29 23:25:15,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527407407407407 [2023-08-29 23:25:15,487 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1528 transitions. [2023-08-29 23:25:15,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1528 transitions. [2023-08-29 23:25:15,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:15,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1528 transitions. [2023-08-29 23:25:15,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.77777777777777) internal successors, (1528), 9 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:15,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:15,494 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:15,494 INFO L175 Difference]: Start difference. First operand has 87 places, 56 transitions, 253 flow. Second operand 9 states and 1528 transitions. [2023-08-29 23:25:15,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 658 flow [2023-08-29 23:25:15,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 129 transitions, 635 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 23:25:15,500 INFO L231 Difference]: Finished difference. Result has 91 places, 60 transitions, 292 flow [2023-08-29 23:25:15,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=91, PETRI_TRANSITIONS=60} [2023-08-29 23:25:15,500 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 23 predicate places. [2023-08-29 23:25:15,501 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 60 transitions, 292 flow [2023-08-29 23:25:15,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.75) internal successors, (1270), 8 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:15,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:15,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:15,510 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 23:25:15,710 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 23:25:15,710 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:25:15,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -184157497, now seen corresponding path program 2 times [2023-08-29 23:25:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934180953] [2023-08-29 23:25:15,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:25:15,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:15,712 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 23:25:15,713 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 23:25:15,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:25:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:25:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:15,909 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:15,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:25:16,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:25:16,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:16,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934180953] [2023-08-29 23:25:16,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934180953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:16,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:16,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:25:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612796607] [2023-08-29 23:25:16,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:16,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:25:16,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:25:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:25:16,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 375 [2023-08-29 23:25:16,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 60 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:16,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:16,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 375 [2023-08-29 23:25:16,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:17,552 INFO L130 PetriNetUnfolder]: 5757/9633 cut-off events. [2023-08-29 23:25:17,552 INFO L131 PetriNetUnfolder]: For 7057/7057 co-relation queries the response was YES. [2023-08-29 23:25:17,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24212 conditions, 9633 events. 5757/9633 cut-off events. For 7057/7057 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 68563 event pairs, 2378 based on Foata normal form. 684/10181 useless extension candidates. Maximal degree in co-relation 24185. Up to 4957 conditions per place. [2023-08-29 23:25:17,591 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 61 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2023-08-29 23:25:17,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 498 flow [2023-08-29 23:25:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:25:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:25:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 692 transitions. [2023-08-29 23:25:17,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613333333333333 [2023-08-29 23:25:17,593 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 692 transitions. [2023-08-29 23:25:17,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 692 transitions. [2023-08-29 23:25:17,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:17,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 692 transitions. [2023-08-29 23:25:17,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:17,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:17,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:17,596 INFO L175 Difference]: Start difference. First operand has 91 places, 60 transitions, 292 flow. Second operand 4 states and 692 transitions. [2023-08-29 23:25:17,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 498 flow [2023-08-29 23:25:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 472 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:25:17,601 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 282 flow [2023-08-29 23:25:17,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-08-29 23:25:17,601 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-29 23:25:17,601 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 282 flow [2023-08-29 23:25:17,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:17,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:17,602 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:17,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:17,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:17,802 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:25:17,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:17,802 INFO L85 PathProgramCache]: Analyzing trace with hash -184157366, now seen corresponding path program 2 times [2023-08-29 23:25:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:17,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532741286] [2023-08-29 23:25:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:25:17,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:17,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:17,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:25:17,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:25:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:25:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:17,978 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:17,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:25:18,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:25:18,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532741286] [2023-08-29 23:25:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532741286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:18,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:18,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:25:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942433046] [2023-08-29 23:25:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:25:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:25:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:25:18,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 375 [2023-08-29 23:25:18,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:18,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:18,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 375 [2023-08-29 23:25:18,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:18,979 INFO L130 PetriNetUnfolder]: 4287/7355 cut-off events. [2023-08-29 23:25:18,979 INFO L131 PetriNetUnfolder]: For 7316/7316 co-relation queries the response was YES. [2023-08-29 23:25:18,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19188 conditions, 7355 events. 4287/7355 cut-off events. For 7316/7316 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 52323 event pairs, 4248 based on Foata normal form. 684/7899 useless extension candidates. Maximal degree in co-relation 19162. Up to 6942 conditions per place. [2023-08-29 23:25:19,014 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-08-29 23:25:19,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 58 transitions, 372 flow [2023-08-29 23:25:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:25:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:25:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-29 23:25:19,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573333333333333 [2023-08-29 23:25:19,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-29 23:25:19,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-29 23:25:19,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:19,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-29 23:25:19,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:19,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:19,020 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:19,020 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 282 flow. Second operand 4 states and 686 transitions. [2023-08-29 23:25:19,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 58 transitions, 372 flow [2023-08-29 23:25:19,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 58 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:25:19,028 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 272 flow [2023-08-29 23:25:19,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2023-08-29 23:25:19,029 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2023-08-29 23:25:19,029 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 272 flow [2023-08-29 23:25:19,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:19,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:19,029 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:25:19,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:19,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:19,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:25:19,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1454691103, now seen corresponding path program 3 times [2023-08-29 23:25:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:19,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379706358] [2023-08-29 23:25:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:25:19,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:19,240 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:19,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:25:19,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:25:19,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:19,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:25:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:19,485 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:19,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:19,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:25:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:22,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:22,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379706358] [2023-08-29 23:25:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379706358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:25:22,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:25:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:25:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673986029] [2023-08-29 23:25:22,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:25:22,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:25:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:25:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:25:37,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-29 23:25:37,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 272 flow. Second operand has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:37,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:37,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-29 23:25:37,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:57,262 INFO L130 PetriNetUnfolder]: 11441/19694 cut-off events. [2023-08-29 23:25:57,262 INFO L131 PetriNetUnfolder]: For 10304/10304 co-relation queries the response was YES. [2023-08-29 23:25:57,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49051 conditions, 19694 events. 11441/19694 cut-off events. For 10304/10304 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 156447 event pairs, 11385 based on Foata normal form. 12/19354 useless extension candidates. Maximal degree in co-relation 49025. Up to 3557 conditions per place. [2023-08-29 23:25:57,373 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 554 selfloop transitions, 24 changer transitions 0/588 dead transitions. [2023-08-29 23:25:57,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 588 transitions, 3212 flow [2023-08-29 23:25:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:25:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:25:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4496 transitions. [2023-08-29 23:25:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49955555555555553 [2023-08-29 23:25:57,382 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4496 transitions. [2023-08-29 23:25:57,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4496 transitions. [2023-08-29 23:25:57,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:57,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4496 transitions. [2023-08-29 23:25:57,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.33333333333334) internal successors, (4496), 24 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:57,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:57,401 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:57,402 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 272 flow. Second operand 24 states and 4496 transitions. [2023-08-29 23:25:57,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 588 transitions, 3212 flow [2023-08-29 23:25:57,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 588 transitions, 3188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:25:57,427 INFO L231 Difference]: Finished difference. Result has 120 places, 71 transitions, 454 flow [2023-08-29 23:25:57,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=454, PETRI_PLACES=120, PETRI_TRANSITIONS=71} [2023-08-29 23:25:57,428 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2023-08-29 23:25:57,428 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 454 flow [2023-08-29 23:25:57,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:57,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:57,429 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:57,443 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 (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:57,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:25:57,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:57,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1556871102, now seen corresponding path program 2 times [2023-08-29 23:25:57,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:57,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278095032] [2023-08-29 23:25:57,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:25:57,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:57,640 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:57,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 23:25:57,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:25:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:25:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:57,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:57,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:25:58,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:25:58,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278095032] [2023-08-29 23:25:58,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278095032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:58,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:58,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:25:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444386080] [2023-08-29 23:25:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:25:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:25:58,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:25:58,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-29 23:25:58,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 71 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:58,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:58,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-29 23:25:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:59,998 INFO L130 PetriNetUnfolder]: 9893/17112 cut-off events. [2023-08-29 23:25:59,999 INFO L131 PetriNetUnfolder]: For 9089/9089 co-relation queries the response was YES. [2023-08-29 23:26:00,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41575 conditions, 17112 events. 9893/17112 cut-off events. For 9089/9089 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 131876 event pairs, 3213 based on Foata normal form. 684/17473 useless extension candidates. Maximal degree in co-relation 41536. Up to 13297 conditions per place. [2023-08-29 23:26:00,076 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 61 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2023-08-29 23:26:00,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 84 transitions, 642 flow [2023-08-29 23:26:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:26:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:26:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-08-29 23:26:00,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2023-08-29 23:26:00,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-08-29 23:26:00,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-08-29 23:26:00,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:00,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-08-29 23:26:00,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:00,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:00,082 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:00,082 INFO L175 Difference]: Start difference. First operand has 120 places, 71 transitions, 454 flow. Second operand 4 states and 695 transitions. [2023-08-29 23:26:00,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 84 transitions, 642 flow [2023-08-29 23:26:00,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 84 transitions, 594 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-29 23:26:00,094 INFO L231 Difference]: Finished difference. Result has 114 places, 73 transitions, 464 flow [2023-08-29 23:26:00,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=464, PETRI_PLACES=114, PETRI_TRANSITIONS=73} [2023-08-29 23:26:00,095 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 46 predicate places. [2023-08-29 23:26:00,095 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 73 transitions, 464 flow [2023-08-29 23:26:00,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:00,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:00,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:00,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:00,305 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:26:00,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -240000082, now seen corresponding path program 1 times [2023-08-29 23:26:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316998386] [2023-08-29 23:26:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:00,306 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:00,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 23:26:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:26:00,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:00,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:26:00,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:00,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316998386] [2023-08-29 23:26:00,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316998386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:00,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:00,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:26:00,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229266780] [2023-08-29 23:26:00,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:00,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:26:00,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:00,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:26:00,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:26:00,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 23:26:00,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 73 transitions, 464 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:00,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:00,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 23:26:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:05,511 INFO L130 PetriNetUnfolder]: 29503/51947 cut-off events. [2023-08-29 23:26:05,511 INFO L131 PetriNetUnfolder]: For 34972/34972 co-relation queries the response was YES. [2023-08-29 23:26:05,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127575 conditions, 51947 events. 29503/51947 cut-off events. For 34972/34972 co-relation queries the response was YES. Maximal size of possible extension queue 1334. Compared 460961 event pairs, 5100 based on Foata normal form. 600/52527 useless extension candidates. Maximal degree in co-relation 127534. Up to 15641 conditions per place. [2023-08-29 23:26:06,174 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 166 selfloop transitions, 16 changer transitions 0/188 dead transitions. [2023-08-29 23:26:06,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 1262 flow [2023-08-29 23:26:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:26:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:26:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1566 transitions. [2023-08-29 23:26:06,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464 [2023-08-29 23:26:06,176 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1566 transitions. [2023-08-29 23:26:06,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1566 transitions. [2023-08-29 23:26:06,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:06,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1566 transitions. [2023-08-29 23:26:06,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:06,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:06,180 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:06,180 INFO L175 Difference]: Start difference. First operand has 114 places, 73 transitions, 464 flow. Second operand 9 states and 1566 transitions. [2023-08-29 23:26:06,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 1262 flow [2023-08-29 23:26:06,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 188 transitions, 1174 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-29 23:26:06,312 INFO L231 Difference]: Finished difference. Result has 125 places, 87 transitions, 530 flow [2023-08-29 23:26:06,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=530, PETRI_PLACES=125, PETRI_TRANSITIONS=87} [2023-08-29 23:26:06,312 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 57 predicate places. [2023-08-29 23:26:06,312 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 87 transitions, 530 flow [2023-08-29 23:26:06,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:06,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:06,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:06,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:06,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:06,522 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:26:06,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash -712728888, now seen corresponding path program 2 times [2023-08-29 23:26:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:06,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725434290] [2023-08-29 23:26:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:26:06,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:06,524 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:06,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 23:26:06,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:26:06,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:26:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:06,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:26:06,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:06,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725434290] [2023-08-29 23:26:06,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725434290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:06,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:06,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:26:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471895383] [2023-08-29 23:26:06,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:06,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 375 [2023-08-29 23:26:06,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 87 transitions, 530 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:06,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:06,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 375 [2023-08-29 23:26:06,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:11,113 INFO L130 PetriNetUnfolder]: 24743/44827 cut-off events. [2023-08-29 23:26:11,113 INFO L131 PetriNetUnfolder]: For 27121/27121 co-relation queries the response was YES. [2023-08-29 23:26:11,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113636 conditions, 44827 events. 24743/44827 cut-off events. For 27121/27121 co-relation queries the response was YES. Maximal size of possible extension queue 1290. Compared 407168 event pairs, 20420 based on Foata normal form. 340/44507 useless extension candidates. Maximal degree in co-relation 113590. Up to 37388 conditions per place. [2023-08-29 23:26:11,564 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 84 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-29 23:26:11,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 101 transitions, 758 flow [2023-08-29 23:26:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:11,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-29 23:26:11,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49066666666666664 [2023-08-29 23:26:11,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-29 23:26:11,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-29 23:26:11,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:11,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-29 23:26:11,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:11,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:11,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:11,568 INFO L175 Difference]: Start difference. First operand has 125 places, 87 transitions, 530 flow. Second operand 3 states and 552 transitions. [2023-08-29 23:26:11,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 101 transitions, 758 flow [2023-08-29 23:26:12,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 101 transitions, 758 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:26:12,058 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 538 flow [2023-08-29 23:26:12,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=128, PETRI_TRANSITIONS=87} [2023-08-29 23:26:12,059 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 60 predicate places. [2023-08-29 23:26:12,059 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 538 flow [2023-08-29 23:26:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:12,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:12,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:12,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:12,259 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:26:12,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2095935382, now seen corresponding path program 3 times [2023-08-29 23:26:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792986251] [2023-08-29 23:26:12,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:26:12,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:12,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:12,261 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:12,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 23:26:12,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 23:26:12,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:26:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:12,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:26:12,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792986251] [2023-08-29 23:26:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792986251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:12,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:12,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:26:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103442087] [2023-08-29 23:26:12,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:26:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:26:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:26:12,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 23:26:12,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 87 transitions, 538 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:12,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:12,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 23:26:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:21,279 INFO L130 PetriNetUnfolder]: 41423/73307 cut-off events. [2023-08-29 23:26:21,279 INFO L131 PetriNetUnfolder]: For 53265/53265 co-relation queries the response was YES. [2023-08-29 23:26:21,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194806 conditions, 73307 events. 41423/73307 cut-off events. For 53265/53265 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 679235 event pairs, 9940 based on Foata normal form. 600/73767 useless extension candidates. Maximal degree in co-relation 194758. Up to 43761 conditions per place. [2023-08-29 23:26:22,120 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 168 selfloop transitions, 16 changer transitions 0/190 dead transitions. [2023-08-29 23:26:22,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 1298 flow [2023-08-29 23:26:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:26:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:26:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1558 transitions. [2023-08-29 23:26:22,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616296296296296 [2023-08-29 23:26:22,122 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1558 transitions. [2023-08-29 23:26:22,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1558 transitions. [2023-08-29 23:26:22,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:22,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1558 transitions. [2023-08-29 23:26:22,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:22,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:22,126 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:22,126 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 538 flow. Second operand 9 states and 1558 transitions. [2023-08-29 23:26:22,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 1298 flow [2023-08-29 23:26:23,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 190 transitions, 1294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:26:23,213 INFO L231 Difference]: Finished difference. Result has 138 places, 100 transitions, 671 flow [2023-08-29 23:26:23,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=138, PETRI_TRANSITIONS=100} [2023-08-29 23:26:23,213 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2023-08-29 23:26:23,213 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 100 transitions, 671 flow [2023-08-29 23:26:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:23,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:23,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:23,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:23,415 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:26:23,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -670632152, now seen corresponding path program 4 times [2023-08-29 23:26:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219891330] [2023-08-29 23:26:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:26:23,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:23,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:23,417 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:23,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 23:26:23,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:26:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:26:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:23,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:26:23,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219891330] [2023-08-29 23:26:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219891330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:23,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:26:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313778137] [2023-08-29 23:26:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:26:23,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:26:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:26:23,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 23:26:23,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 100 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:23,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:23,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 23:26:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:33,880 INFO L130 PetriNetUnfolder]: 45303/81127 cut-off events. [2023-08-29 23:26:33,880 INFO L131 PetriNetUnfolder]: For 80353/80353 co-relation queries the response was YES. [2023-08-29 23:26:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225567 conditions, 81127 events. 45303/81127 cut-off events. For 80353/80353 co-relation queries the response was YES. Maximal size of possible extension queue 2060. Compared 770810 event pairs, 12100 based on Foata normal form. 600/81587 useless extension candidates. Maximal degree in co-relation 225514. Up to 52401 conditions per place. [2023-08-29 23:26:34,835 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 180 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2023-08-29 23:26:34,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 206 transitions, 1475 flow [2023-08-29 23:26:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:26:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:26:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1888 transitions. [2023-08-29 23:26:34,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576969696969697 [2023-08-29 23:26:34,986 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1888 transitions. [2023-08-29 23:26:34,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1888 transitions. [2023-08-29 23:26:34,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:34,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1888 transitions. [2023-08-29 23:26:34,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.63636363636363) internal successors, (1888), 11 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,995 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,995 INFO L175 Difference]: Start difference. First operand has 138 places, 100 transitions, 671 flow. Second operand 11 states and 1888 transitions. [2023-08-29 23:26:34,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 206 transitions, 1475 flow [2023-08-29 23:26:36,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 206 transitions, 1473 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 23:26:36,433 INFO L231 Difference]: Finished difference. Result has 154 places, 109 transitions, 820 flow [2023-08-29 23:26:36,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=154, PETRI_TRANSITIONS=109} [2023-08-29 23:26:36,433 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 86 predicate places. [2023-08-29 23:26:36,433 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 109 transitions, 820 flow [2023-08-29 23:26:36,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,441 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 (24)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:36,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:26:36,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1852416014, now seen corresponding path program 5 times [2023-08-29 23:26:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487333556] [2023-08-29 23:26:36,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:26:36,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:36,637 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 23:26:36,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:26:36,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:36,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:26:36,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:36,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:26:36,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487333556] [2023-08-29 23:26:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487333556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:36,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:26:36,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111133622] [2023-08-29 23:26:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:36,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:36,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 375 [2023-08-29 23:26:36,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 109 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:36,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 375 [2023-08-29 23:26:36,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:46,164 INFO L130 PetriNetUnfolder]: 40381/74115 cut-off events. [2023-08-29 23:26:46,164 INFO L131 PetriNetUnfolder]: For 86201/86581 co-relation queries the response was YES. [2023-08-29 23:26:46,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210895 conditions, 74115 events. 40381/74115 cut-off events. For 86201/86581 co-relation queries the response was YES. Maximal size of possible extension queue 1936. Compared 714829 event pairs, 35898 based on Foata normal form. 740/73843 useless extension candidates. Maximal degree in co-relation 210834. Up to 64428 conditions per place. [2023-08-29 23:26:47,078 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 91 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-29 23:26:47,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 119 transitions, 1026 flow [2023-08-29 23:26:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-29 23:26:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49066666666666664 [2023-08-29 23:26:47,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-29 23:26:47,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-29 23:26:47,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:47,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-29 23:26:47,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:47,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:47,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:47,081 INFO L175 Difference]: Start difference. First operand has 154 places, 109 transitions, 820 flow. Second operand 3 states and 552 transitions. [2023-08-29 23:26:47,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 119 transitions, 1026 flow [2023-08-29 23:26:49,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 119 transitions, 1011 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:49,004 INFO L231 Difference]: Finished difference. Result has 156 places, 106 transitions, 778 flow [2023-08-29 23:26:49,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=156, PETRI_TRANSITIONS=106} [2023-08-29 23:26:49,004 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 88 predicate places. [2023-08-29 23:26:49,005 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 106 transitions, 778 flow [2023-08-29 23:26:49,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:49,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:49,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:49,012 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 (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:49,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:49,205 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:26:49,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash 181024682, now seen corresponding path program 6 times [2023-08-29 23:26:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:49,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732084829] [2023-08-29 23:26:49,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:26:49,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:49,207 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:49,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 23:26:49,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-29 23:26:49,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:26:49,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:49,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:26:49,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732084829] [2023-08-29 23:26:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732084829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:49,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:49,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:26:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913351294] [2023-08-29 23:26:49,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:26:49,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:49,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:26:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:26:49,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 23:26:49,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 106 transitions, 778 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:49,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:49,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 23:26:49,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:58,057 INFO L130 PetriNetUnfolder]: 36823/67027 cut-off events. [2023-08-29 23:26:58,057 INFO L131 PetriNetUnfolder]: For 84269/84269 co-relation queries the response was YES. [2023-08-29 23:26:58,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198088 conditions, 67027 events. 36823/67027 cut-off events. For 84269/84269 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 629594 event pairs, 11260 based on Foata normal form. 600/67367 useless extension candidates. Maximal degree in co-relation 198026. Up to 50481 conditions per place. [2023-08-29 23:26:59,174 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 153 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2023-08-29 23:26:59,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 175 transitions, 1336 flow [2023-08-29 23:26:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:26:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:26:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1707 transitions. [2023-08-29 23:26:59,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552 [2023-08-29 23:26:59,176 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1707 transitions. [2023-08-29 23:26:59,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1707 transitions. [2023-08-29 23:26:59,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:59,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1707 transitions. [2023-08-29 23:26:59,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.7) internal successors, (1707), 10 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:59,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:59,180 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:59,180 INFO L175 Difference]: Start difference. First operand has 156 places, 106 transitions, 778 flow. Second operand 10 states and 1707 transitions. [2023-08-29 23:26:59,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 175 transitions, 1336 flow [2023-08-29 23:27:01,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 175 transitions, 1329 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:27:01,065 INFO L231 Difference]: Finished difference. Result has 163 places, 104 transitions, 791 flow [2023-08-29 23:27:01,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=791, PETRI_PLACES=163, PETRI_TRANSITIONS=104} [2023-08-29 23:27:01,066 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 95 predicate places. [2023-08-29 23:27:01,066 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 104 transitions, 791 flow [2023-08-29 23:27:01,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:01,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:01,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:01,081 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 (26)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:01,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:01,281 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:27:01,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1279514246, now seen corresponding path program 7 times [2023-08-29 23:27:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:27:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356664914] [2023-08-29 23:27:01,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:27:01,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:27:01,284 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:27:01,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-29 23:27:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:27:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:27:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:27:01,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:27:01,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:27:01,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356664914] [2023-08-29 23:27:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356664914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:27:01,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:27:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:27:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024197005] [2023-08-29 23:27:01,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:27:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:27:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:27:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:27:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:27:01,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 23:27:01,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 104 transitions, 791 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:01,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:01,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 23:27:01,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:09,015 INFO L130 PetriNetUnfolder]: 30863/57287 cut-off events. [2023-08-29 23:27:09,016 INFO L131 PetriNetUnfolder]: For 81393/81393 co-relation queries the response was YES. [2023-08-29 23:27:09,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171177 conditions, 57287 events. 30863/57287 cut-off events. For 81393/81393 co-relation queries the response was YES. Maximal size of possible extension queue 1506. Compared 538907 event pairs, 9580 based on Foata normal form. 600/57627 useless extension candidates. Maximal degree in co-relation 171114. Up to 41201 conditions per place. [2023-08-29 23:27:10,048 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 144 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-08-29 23:27:10,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 165 transitions, 1306 flow [2023-08-29 23:27:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:27:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:27:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1540 transitions. [2023-08-29 23:27:10,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562962962962963 [2023-08-29 23:27:10,051 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1540 transitions. [2023-08-29 23:27:10,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1540 transitions. [2023-08-29 23:27:10,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:10,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1540 transitions. [2023-08-29 23:27:10,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.11111111111111) internal successors, (1540), 9 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:10,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:10,054 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:10,054 INFO L175 Difference]: Start difference. First operand has 163 places, 104 transitions, 791 flow. Second operand 9 states and 1540 transitions. [2023-08-29 23:27:10,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 165 transitions, 1306 flow [2023-08-29 23:27:11,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 165 transitions, 1260 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-29 23:27:11,395 INFO L231 Difference]: Finished difference. Result has 161 places, 102 transitions, 762 flow [2023-08-29 23:27:11,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=161, PETRI_TRANSITIONS=102} [2023-08-29 23:27:11,396 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 93 predicate places. [2023-08-29 23:27:11,396 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 102 transitions, 762 flow [2023-08-29 23:27:11,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:11,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:11,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:11,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:11,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:11,601 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:27:11,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 233984148, now seen corresponding path program 8 times [2023-08-29 23:27:11,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:27:11,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124694494] [2023-08-29 23:27:11,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:27:11,602 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 23:27:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:27:11,603 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:27:11,604 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 (28)] Waiting until timeout for monitored process [2023-08-29 23:27:11,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:27:11,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:27:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:27:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:27:11,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:27:11,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:27:11,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124694494] [2023-08-29 23:27:11,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124694494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:27:11,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:27:11,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:27:11,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640247787] [2023-08-29 23:27:11,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:27:11,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:27:11,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:27:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:27:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:27:11,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 23:27:11,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 102 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:11,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:11,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 23:27:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:18,214 INFO L130 PetriNetUnfolder]: 26023/51047 cut-off events. [2023-08-29 23:27:18,215 INFO L131 PetriNetUnfolder]: For 69537/69537 co-relation queries the response was YES. [2023-08-29 23:27:18,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154085 conditions, 51047 events. 26023/51047 cut-off events. For 69537/69537 co-relation queries the response was YES. Maximal size of possible extension queue 1365. Compared 497611 event pairs, 6140 based on Foata normal form. 600/51627 useless extension candidates. Maximal degree in co-relation 154022. Up to 11520 conditions per place. [2023-08-29 23:27:19,101 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 140 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2023-08-29 23:27:19,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 180 transitions, 1424 flow [2023-08-29 23:27:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:27:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:27:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1549 transitions. [2023-08-29 23:27:19,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45896296296296296 [2023-08-29 23:27:19,103 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1549 transitions. [2023-08-29 23:27:19,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1549 transitions. [2023-08-29 23:27:19,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:19,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1549 transitions. [2023-08-29 23:27:19,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.11111111111111) internal successors, (1549), 9 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:19,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:19,107 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:19,107 INFO L175 Difference]: Start difference. First operand has 161 places, 102 transitions, 762 flow. Second operand 9 states and 1549 transitions. [2023-08-29 23:27:19,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 180 transitions, 1424 flow [2023-08-29 23:27:20,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 180 transitions, 1394 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:27:20,401 INFO L231 Difference]: Finished difference. Result has 164 places, 107 transitions, 879 flow [2023-08-29 23:27:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=164, PETRI_TRANSITIONS=107} [2023-08-29 23:27:20,402 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-08-29 23:27:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 107 transitions, 879 flow [2023-08-29 23:27:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:20,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:20,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:20,604 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:27:20,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:20,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1357032408, now seen corresponding path program 1 times [2023-08-29 23:27:20,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:27:20,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75814474] [2023-08-29 23:27:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:27:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:27:20,606 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:27:20,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-29 23:27:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:27:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:27:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:20,807 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:27:20,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:27:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:21,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:27:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:22,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:27:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75814474] [2023-08-29 23:27:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75814474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:27:22,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:27:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:27:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086041608] [2023-08-29 23:27:22,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:27:22,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:27:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:27:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:27:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:27:26,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-08-29 23:27:26,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 107 transitions, 879 flow. Second operand has 10 states, 10 states have (on average 158.8) internal successors, (1588), 10 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:26,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:26,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-08-29 23:27:26,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:37,682 INFO L130 PetriNetUnfolder]: 21423/40883 cut-off events. [2023-08-29 23:27:37,682 INFO L131 PetriNetUnfolder]: For 72276/72773 co-relation queries the response was YES. [2023-08-29 23:27:38,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126292 conditions, 40883 events. 21423/40883 cut-off events. For 72276/72773 co-relation queries the response was YES. Maximal size of possible extension queue 1447. Compared 393931 event pairs, 20200 based on Foata normal form. 123/39245 useless extension candidates. Maximal degree in co-relation 126226. Up to 33661 conditions per place. [2023-08-29 23:27:38,163 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 146 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2023-08-29 23:27:38,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 200 transitions, 1741 flow [2023-08-29 23:27:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:27:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:27:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1822 transitions. [2023-08-29 23:27:38,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416969696969697 [2023-08-29 23:27:38,166 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1822 transitions. [2023-08-29 23:27:38,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1822 transitions. [2023-08-29 23:27:38,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:38,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1822 transitions. [2023-08-29 23:27:38,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 165.63636363636363) internal successors, (1822), 11 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:38,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:38,170 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:38,171 INFO L175 Difference]: Start difference. First operand has 164 places, 107 transitions, 879 flow. Second operand 11 states and 1822 transitions. [2023-08-29 23:27:38,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 200 transitions, 1741 flow [2023-08-29 23:27:38,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 200 transitions, 1643 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-29 23:27:38,958 INFO L231 Difference]: Finished difference. Result has 172 places, 115 transitions, 928 flow [2023-08-29 23:27:38,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=928, PETRI_PLACES=172, PETRI_TRANSITIONS=115} [2023-08-29 23:27:38,959 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 104 predicate places. [2023-08-29 23:27:38,959 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 115 transitions, 928 flow [2023-08-29 23:27:38,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.8) internal successors, (1588), 10 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:38,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:38,959 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-29 23:27:38,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:39,165 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:27:39,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash 95688415, now seen corresponding path program 4 times [2023-08-29 23:27:39,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:27:39,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377635235] [2023-08-29 23:27:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:27:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:27:39,167 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:27:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-29 23:27:39,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:27:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:27:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 23:27:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:39,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:27:39,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:27:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:40,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:27:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:49,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:27:49,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377635235] [2023-08-29 23:27:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377635235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:27:49,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:27:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-29 23:27:49,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010205078] [2023-08-29 23:27:49,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:27:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-29 23:27:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:27:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-29 23:27:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-29 23:29:01,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-29 23:29:01,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 115 transitions, 928 flow. Second operand has 48 states, 48 states have (on average 164.0) internal successors, (7872), 48 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:01,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:29:01,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-29 23:29:01,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:23,717 WARN L222 SmtUtils]: Spent 13.37s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:29:38,029 WARN L222 SmtUtils]: Spent 12.58s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:29:48,187 WARN L222 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:30:00,610 WARN L222 SmtUtils]: Spent 10.40s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:30:12,453 WARN L222 SmtUtils]: Spent 9.33s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:30:22,358 WARN L222 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:30:32,559 WARN L222 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:30:41,400 WARN L222 SmtUtils]: Spent 6.94s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:31:47,533 INFO L130 PetriNetUnfolder]: 48287/92144 cut-off events. [2023-08-29 23:31:47,533 INFO L131 PetriNetUnfolder]: For 156775/157087 co-relation queries the response was YES. [2023-08-29 23:31:48,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293226 conditions, 92144 events. 48287/92144 cut-off events. For 156775/157087 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 927191 event pairs, 46395 based on Foata normal form. 68/88272 useless extension candidates. Maximal degree in co-relation 293159. Up to 12901 conditions per place. [2023-08-29 23:31:48,792 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 1886 selfloop transitions, 48 changer transitions 0/1964 dead transitions. [2023-08-29 23:31:48,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1964 transitions, 16663 flow [2023-08-29 23:31:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-29 23:31:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-29 23:31:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9062 transitions. [2023-08-29 23:31:48,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034444444444445 [2023-08-29 23:31:48,802 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9062 transitions. [2023-08-29 23:31:48,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9062 transitions. [2023-08-29 23:31:48,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:31:48,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9062 transitions. [2023-08-29 23:31:48,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 188.79166666666666) internal successors, (9062), 48 states have internal predecessors, (9062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:48,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 375.0) internal successors, (18375), 49 states have internal predecessors, (18375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:48,829 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 375.0) internal successors, (18375), 49 states have internal predecessors, (18375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:48,829 INFO L175 Difference]: Start difference. First operand has 172 places, 115 transitions, 928 flow. Second operand 48 states and 9062 transitions. [2023-08-29 23:31:48,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1964 transitions, 16663 flow [2023-08-29 23:31:53,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1964 transitions, 16651 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:31:53,200 INFO L231 Difference]: Finished difference. Result has 240 places, 140 transitions, 1280 flow [2023-08-29 23:31:53,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1280, PETRI_PLACES=240, PETRI_TRANSITIONS=140} [2023-08-29 23:31:53,200 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 172 predicate places. [2023-08-29 23:31:53,201 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 140 transitions, 1280 flow [2023-08-29 23:31:53,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 164.0) internal successors, (7872), 48 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:53,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:31:53,202 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:31:53,211 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 (30)] Ended with exit code 0 [2023-08-29 23:31:53,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:31:53,403 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:31:53,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:31:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -231442323, now seen corresponding path program 2 times [2023-08-29 23:31:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:31:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564028203] [2023-08-29 23:31:53,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:31:53,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:31:53,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:31:53,405 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:31:53,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-29 23:31:53,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:31:53,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:31:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:31:53,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:31:53,665 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:31:53,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:31:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:31:53,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:31:53,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:31:53,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564028203] [2023-08-29 23:31:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564028203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:31:53,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:31:53,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:31:53,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926328142] [2023-08-29 23:31:53,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:31:53,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:31:53,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:31:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:31:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:31:54,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-29 23:31:54,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 140 transitions, 1280 flow. Second operand has 5 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:54,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:31:54,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-29 23:31:54,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:32:08,686 INFO L130 PetriNetUnfolder]: 45767/87412 cut-off events. [2023-08-29 23:32:08,687 INFO L131 PetriNetUnfolder]: For 152448/152628 co-relation queries the response was YES. [2023-08-29 23:32:10,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276289 conditions, 87412 events. 45767/87412 cut-off events. For 152448/152628 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 875651 event pairs, 35325 based on Foata normal form. 2184/84634 useless extension candidates. Maximal degree in co-relation 276196. Up to 64441 conditions per place. [2023-08-29 23:32:10,280 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 93 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2023-08-29 23:32:10,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 149 transitions, 1535 flow [2023-08-29 23:32:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:32:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:32:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 854 transitions. [2023-08-29 23:32:10,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554666666666667 [2023-08-29 23:32:10,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 854 transitions. [2023-08-29 23:32:10,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 854 transitions. [2023-08-29 23:32:10,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:32:10,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 854 transitions. [2023-08-29 23:32:10,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.8) internal successors, (854), 5 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:10,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:10,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:10,286 INFO L175 Difference]: Start difference. First operand has 240 places, 140 transitions, 1280 flow. Second operand 5 states and 854 transitions. [2023-08-29 23:32:10,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 149 transitions, 1535 flow [2023-08-29 23:32:12,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 149 transitions, 1424 flow, removed 25 selfloop flow, removed 24 redundant places. [2023-08-29 23:32:12,269 INFO L231 Difference]: Finished difference. Result has 218 places, 138 transitions, 1205 flow [2023-08-29 23:32:12,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=218, PETRI_TRANSITIONS=138} [2023-08-29 23:32:12,270 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 150 predicate places. [2023-08-29 23:32:12,270 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 138 transitions, 1205 flow [2023-08-29 23:32:12,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:12,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:32:12,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:32:12,278 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 (31)] Forceful destruction successful, exit code 0 [2023-08-29 23:32:12,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:32:12,477 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:32:12,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:32:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 339770621, now seen corresponding path program 1 times [2023-08-29 23:32:12,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:32:12,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277310119] [2023-08-29 23:32:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:32:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:32:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:32:12,479 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:32:12,480 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 (32)] Waiting until timeout for monitored process [2023-08-29 23:32:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:32:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:32:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:32:13,239 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-29 23:32:13,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 417 treesize of output 125 [2023-08-29 23:32:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:32:16,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:32:16,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:32:16,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277310119] [2023-08-29 23:32:16,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277310119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:32:16,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:32:16,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:32:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657896695] [2023-08-29 23:32:16,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:32:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:32:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:32:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:32:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2023-08-29 23:32:18,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:20,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:22,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:25,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:27,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:29,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:31,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:33,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:36,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:38,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:40,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:42,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:44,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:46,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:48,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:51,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:53,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:55,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:55,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-29 23:32:55,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 138 transitions, 1205 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:55,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:32:55,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-29 23:32:55,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:32:57,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:32:59,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:01,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:03,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:06,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:08,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:11,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:13,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:15,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:17,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:19,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:21,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:23,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:25,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:33:45,999 INFO L130 PetriNetUnfolder]: 59359/111107 cut-off events. [2023-08-29 23:33:45,999 INFO L131 PetriNetUnfolder]: For 172517/172693 co-relation queries the response was YES. [2023-08-29 23:33:47,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365121 conditions, 111107 events. 59359/111107 cut-off events. For 172517/172693 co-relation queries the response was YES. Maximal size of possible extension queue 1764. Compared 1109387 event pairs, 14872 based on Foata normal form. 176/107719 useless extension candidates. Maximal degree in co-relation 365029. Up to 59802 conditions per place. [2023-08-29 23:33:48,114 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 113 selfloop transitions, 21 changer transitions 42/204 dead transitions. [2023-08-29 23:33:48,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 204 transitions, 1941 flow [2023-08-29 23:33:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:33:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:33:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1212 transitions. [2023-08-29 23:33:48,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404 [2023-08-29 23:33:48,117 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1212 transitions. [2023-08-29 23:33:48,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1212 transitions. [2023-08-29 23:33:48,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:33:48,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1212 transitions. [2023-08-29 23:33:48,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.5) internal successors, (1212), 8 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:48,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:48,122 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:48,122 INFO L175 Difference]: Start difference. First operand has 218 places, 138 transitions, 1205 flow. Second operand 8 states and 1212 transitions. [2023-08-29 23:33:48,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 204 transitions, 1941 flow [2023-08-29 23:33:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 204 transitions, 1853 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:33:52,063 INFO L231 Difference]: Finished difference. Result has 226 places, 146 transitions, 1290 flow [2023-08-29 23:33:52,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=226, PETRI_TRANSITIONS=146} [2023-08-29 23:33:52,063 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 158 predicate places. [2023-08-29 23:33:52,064 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 146 transitions, 1290 flow [2023-08-29 23:33:52,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:52,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:33:52,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:33:52,073 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 (32)] Forceful destruction successful, exit code 0 [2023-08-29 23:33:52,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:33:52,267 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:33:52,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:33:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -432009471, now seen corresponding path program 2 times [2023-08-29 23:33:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:33:52,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210039306] [2023-08-29 23:33:52,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:33:52,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:33:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:33:52,269 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:33:52,270 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 (33)] Waiting until timeout for monitored process [2023-08-29 23:33:52,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:33:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:33:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:33:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:33:52,897 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-29 23:33:52,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 417 treesize of output 125 [2023-08-29 23:33:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:33:55,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:33:55,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:33:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210039306] [2023-08-29 23:33:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210039306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:33:55,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:33:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:33:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14079045] [2023-08-29 23:33:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:33:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:33:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:33:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:33:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2023-08-29 23:33:57,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:00,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:02,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:04,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:06,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:08,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:10,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:12,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:14,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:16,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:18,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:21,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:22,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:23,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:25,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:27,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:30,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:32,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:34,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:37,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:37,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-29 23:34:37,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 146 transitions, 1290 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:37,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:34:37,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-29 23:34:37,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:34:39,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:41,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:43,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:45,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:47,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:49,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:51,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:53,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:55,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:34:57,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:00,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:04,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:06,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:08,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:10,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:12,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:14,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:16,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:18,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:25,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:27,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:32,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:35:46,994 INFO L130 PetriNetUnfolder]: 57467/108687 cut-off events. [2023-08-29 23:35:46,994 INFO L131 PetriNetUnfolder]: For 208988/209164 co-relation queries the response was YES. [2023-08-29 23:35:49,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375377 conditions, 108687 events. 57467/108687 cut-off events. For 208988/209164 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 1105602 event pairs, 10428 based on Foata normal form. 176/105255 useless extension candidates. Maximal degree in co-relation 375281. Up to 24860 conditions per place. [2023-08-29 23:35:49,464 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 162 selfloop transitions, 18 changer transitions 40/248 dead transitions. [2023-08-29 23:35:49,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 248 transitions, 2269 flow [2023-08-29 23:35:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:35:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:35:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1381 transitions. [2023-08-29 23:35:49,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091851851851852 [2023-08-29 23:35:49,468 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1381 transitions. [2023-08-29 23:35:49,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1381 transitions. [2023-08-29 23:35:49,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:49,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1381 transitions. [2023-08-29 23:35:49,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.44444444444446) internal successors, (1381), 9 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,474 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,474 INFO L175 Difference]: Start difference. First operand has 226 places, 146 transitions, 1290 flow. Second operand 9 states and 1381 transitions. [2023-08-29 23:35:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 248 transitions, 2269 flow [2023-08-29 23:35:56,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 248 transitions, 2199 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-29 23:35:56,304 INFO L231 Difference]: Finished difference. Result has 230 places, 146 transitions, 1301 flow [2023-08-29 23:35:56,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1301, PETRI_PLACES=230, PETRI_TRANSITIONS=146} [2023-08-29 23:35:56,305 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 162 predicate places. [2023-08-29 23:35:56,305 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 146 transitions, 1301 flow [2023-08-29 23:35:56,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:56,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:56,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:56,313 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 (33)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:56,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:35:56,506 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-29 23:35:56,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash 339295205, now seen corresponding path program 3 times [2023-08-29 23:35:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:35:56,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87740624] [2023-08-29 23:35:56,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:35:56,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:35:56,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:35:56,508 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:35:56,511 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 (34)] Waiting until timeout for monitored process [2023-08-29 23:35:56,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 23:35:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:35:56,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:35:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:57,128 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-29 23:35:57,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 417 treesize of output 125 [2023-08-29 23:35:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:35:59,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:35:59,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:35:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87740624] [2023-08-29 23:35:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87740624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:59,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:59,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:35:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096476189] [2023-08-29 23:35:59,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:35:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:35:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:35:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2023-08-29 23:36:02,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:04,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:06,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:08,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:10,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:12,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:14,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:16,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:18,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:20,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:22,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:24,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:26,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:28,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:30,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:33,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:33,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-29 23:36:33,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 146 transitions, 1301 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:33,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:33,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-29 23:36:33,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:35,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:37,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:39,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:41,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:43,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:45,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:47,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:49,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:51,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:53,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:55,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:59,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:01,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:03,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:05,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:07,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:09,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:12,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:14,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15