./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:38:59,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:38:59,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:38:59,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:38:59,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:38:59,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:38:59,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:38:59,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:38:59,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:38:59,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:38:59,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:38:59,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:38:59,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:38:59,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:38:59,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:38:59,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:38:59,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:38:59,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:38:59,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:38:59,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:38:59,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:38:59,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:38:59,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:38:59,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:38:59,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:38:59,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:38:59,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:38:59,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:38:59,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:38:59,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:38:59,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:38:59,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:38:59,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:38:59,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:38:59,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:38:59,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:38:59,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:38:59,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:38:59,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:38:59,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:38:59,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:38:59,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:38:59,745 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:38:59,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:38:59,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:38:59,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:38:59,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:38:59,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:38:59,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:38:59,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:38:59,748 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:38:59,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:38:59,749 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:38:59,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:38:59,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:38:59,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:38:59,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:38:59,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:38:59,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:38:59,750 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:38:59,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:38:59,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:38:59,751 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:38:59,751 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:38:59,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:38:59,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:38:59,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:38:59,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:38:59,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:38:59,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:38:59,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:38:59,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:38:59,753 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:38:59,754 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:38:59,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:38:59,754 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:38:59,754 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:39:00,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:39:00,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:39:00,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:39:00,093 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:39:00,093 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:39:00,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-29 22:39:01,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:39:01,527 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:39:01,528 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-29 22:39:01,533 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3817f0a41/6368fb5de99b4f179180456ee07ae6f4/FLAG1d2919942 [2023-08-29 22:39:01,548 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3817f0a41/6368fb5de99b4f179180456ee07ae6f4 [2023-08-29 22:39:01,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:39:01,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:39:01,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:39:01,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:39:01,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:39:01,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:39:01" (1/1) ... [2023-08-29 22:39:01,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cedfca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:01, skipping insertion in model container [2023-08-29 22:39:01,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:39:01" (1/1) ... [2023-08-29 22:39:01,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:39:01,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:39:01,730 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-29 22:39:01,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:39:01,751 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:39:01,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c44bf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:01, skipping insertion in model container [2023-08-29 22:39:01,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:39:01,752 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:39:01,754 INFO L158 Benchmark]: Toolchain (without parser) took 201.73ms. Allocated memory is still 88.1MB. Free memory was 67.8MB in the beginning and 57.9MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 22:39:01,754 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:39:01,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.64ms. Allocated memory is still 88.1MB. Free memory was 67.5MB in the beginning and 57.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 22:39:01,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.64ms. Allocated memory is still 88.1MB. Free memory was 67.5MB in the beginning and 57.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:39:03,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:39:03,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:39:03,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:39:03,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:39:03,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:39:03,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:39:03,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:39:03,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:39:03,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:39:03,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:39:03,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:39:03,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:39:03,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:39:03,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:39:03,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:39:03,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:39:03,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:39:03,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:39:03,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:39:03,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:39:03,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:39:03,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:39:03,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:39:03,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:39:03,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:39:03,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:39:03,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:39:03,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:39:03,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:39:03,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:39:03,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:39:03,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:39:03,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:39:03,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:39:03,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:39:03,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:39:03,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:39:03,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:39:03,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:39:03,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:39:03,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:39:03,461 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:39:03,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:39:03,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:39:03,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:39:03,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:39:03,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:39:03,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:39:03,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:39:03,467 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:39:03,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:39:03,468 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:39:03,468 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:39:03,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:39:03,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:39:03,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:39:03,469 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:39:03,470 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:39:03,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:39:03,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:39:03,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:39:03,470 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:39:03,471 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:39:03,471 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:39:03,471 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:39:03,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:39:03,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:39:03,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:39:03,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:39:03,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:39:03,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:39:03,472 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:39:03,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:39:03,473 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:39:03,473 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:39:03,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:39:03,474 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:39:03,474 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:39:03,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:39:03,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:39:03,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:39:03,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:39:03,827 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:39:03,828 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:39:03,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-29 22:39:05,016 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:39:05,198 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:39:05,199 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-29 22:39:05,205 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548ea4da9/fc03eb77af724627aed273ee88653934/FLAG7ff18387c [2023-08-29 22:39:05,215 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548ea4da9/fc03eb77af724627aed273ee88653934 [2023-08-29 22:39:05,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:39:05,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:39:05,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:39:05,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:39:05,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:39:05,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fde9c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05, skipping insertion in model container [2023-08-29 22:39:05,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:39:05,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:39:05,385 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-29 22:39:05,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:39:05,423 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:39:05,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:39:05,451 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-29 22:39:05,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:39:05,475 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:39:05,508 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-29 22:39:05,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:39:05,535 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:39:05,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05 WrapperNode [2023-08-29 22:39:05,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:39:05,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:39:05,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:39:05,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:39:05,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,605 INFO L138 Inliner]: procedures = 27, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 194 [2023-08-29 22:39:05,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:39:05,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:39:05,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:39:05,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:39:05,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:39:05,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:39:05,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:39:05,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:39:05,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (1/1) ... [2023-08-29 22:39:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:39:05,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:39:05,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:39:05,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:39:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:39:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:39:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:39:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:39:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:39:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:39:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:39:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:39:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:39:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:39:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:39:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:39:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:39:05,748 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:39:05,838 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:39:05,840 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:39:06,441 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:39:06,450 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:39:06,452 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:39:06,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:39:06 BoogieIcfgContainer [2023-08-29 22:39:06,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:39:06,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:39:06,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:39:06,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:39:06,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:39:05" (1/3) ... [2023-08-29 22:39:06,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362c8be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:39:06, skipping insertion in model container [2023-08-29 22:39:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:39:05" (2/3) ... [2023-08-29 22:39:06,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362c8be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:39:06, skipping insertion in model container [2023-08-29 22:39:06,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:39:06" (3/3) ... [2023-08-29 22:39:06,461 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-08-29 22:39:06,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:39:06,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-29 22:39:06,475 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:39:06,587 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:39:06,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 518 flow [2023-08-29 22:39:06,736 INFO L130 PetriNetUnfolder]: 21/249 cut-off events. [2023-08-29 22:39:06,736 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:39:06,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 21/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 376 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2023-08-29 22:39:06,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 251 transitions, 518 flow [2023-08-29 22:39:06,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 245 transitions, 502 flow [2023-08-29 22:39:06,757 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:39:06,777 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 245 transitions, 502 flow [2023-08-29 22:39:06,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 245 transitions, 502 flow [2023-08-29 22:39:06,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 245 transitions, 502 flow [2023-08-29 22:39:06,844 INFO L130 PetriNetUnfolder]: 21/245 cut-off events. [2023-08-29 22:39:06,844 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:39:06,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 21/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 376 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2023-08-29 22:39:06,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 6816 [2023-08-29 22:39:23,264 INFO L134 LiptonReduction]: Checked pairs total: 7338 [2023-08-29 22:39:23,264 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-08-29 22:39:23,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:39:23,280 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;@53bda07f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:39:23,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-29 22:39:23,283 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:39:23,283 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:39:23,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:23,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:39:23,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:23,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash 32138, now seen corresponding path program 1 times [2023-08-29 22:39:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:23,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025052894] [2023-08-29 22:39:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:23,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:23,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:23,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:23,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:39:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:39:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:23,604 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:23,605 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:23,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:23,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:23,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025052894] [2023-08-29 22:39:23,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025052894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:23,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:23,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:39:23,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172420167] [2023-08-29 22:39:23,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:23,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:39:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:39:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:39:23,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-08-29 22:39:23,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 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 22:39:23,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:23,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-08-29 22:39:23,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:24,353 INFO L130 PetriNetUnfolder]: 909/1497 cut-off events. [2023-08-29 22:39:24,353 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 22:39:24,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3050 conditions, 1497 events. 909/1497 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 7419 event pairs, 770 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 1376. Up to 751 conditions per place. [2023-08-29 22:39:24,363 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 73 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-08-29 22:39:24,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 332 flow [2023-08-29 22:39:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-08-29 22:39:24,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543761638733706 [2023-08-29 22:39:24,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-08-29 22:39:24,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-08-29 22:39:24,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:24,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-08-29 22:39:24,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:24,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:24,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:24,412 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 732 transitions. [2023-08-29 22:39:24,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 332 flow [2023-08-29 22:39:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:39:24,423 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 116 flow [2023-08-29 22:39:24,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-29 22:39:24,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-29 22:39:24,428 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 116 flow [2023-08-29 22:39:24,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 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 22:39:24,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:24,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:39:24,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:24,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:24,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:24,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash 32136, now seen corresponding path program 1 times [2023-08-29 22:39:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435316338] [2023-08-29 22:39:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:24,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:24,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:24,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:39:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:39:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:24,750 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:39:24,750 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:39:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:24,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:24,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:24,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435316338] [2023-08-29 22:39:24,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435316338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:24,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:24,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:39:24,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295388342] [2023-08-29 22:39:24,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:24,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:39:24,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:24,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:39:24,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:39:24,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 537 [2023-08-29 22:39:24,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 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 22:39:24,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:24,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 537 [2023-08-29 22:39:24,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:25,200 INFO L130 PetriNetUnfolder]: 909/1493 cut-off events. [2023-08-29 22:39:25,200 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 22:39:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 1493 events. 909/1493 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 7573 event pairs, 770 based on Foata normal form. 2/525 useless extension candidates. Maximal degree in co-relation 1499. Up to 1493 conditions per place. [2023-08-29 22:39:25,209 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-29 22:39:25,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 194 flow [2023-08-29 22:39:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-08-29 22:39:25,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43265052762259465 [2023-08-29 22:39:25,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-08-29 22:39:25,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-08-29 22:39:25,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:25,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-08-29 22:39:25,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,225 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 116 flow. Second operand 3 states and 697 transitions. [2023-08-29 22:39:25,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 194 flow [2023-08-29 22:39:25,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:25,228 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 106 flow [2023-08-29 22:39:25,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-29 22:39:25,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-08-29 22:39:25,230 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 106 flow [2023-08-29 22:39:25,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 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 22:39:25,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:25,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:39:25,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:25,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:25,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:25,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1001766, now seen corresponding path program 1 times [2023-08-29 22:39:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:25,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139630724] [2023-08-29 22:39:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:25,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:25,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:25,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:39:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:39:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:25,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:25,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139630724] [2023-08-29 22:39:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139630724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:25,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:25,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:39:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898361797] [2023-08-29 22:39:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:25,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:39:25,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:39:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:39:25,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-29 22:39:25,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:25,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-29 22:39:25,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:25,852 INFO L130 PetriNetUnfolder]: 455/750 cut-off events. [2023-08-29 22:39:25,853 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 22:39:25,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 750 events. 455/750 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3222 event pairs, 385 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 1514. Up to 749 conditions per place. [2023-08-29 22:39:25,856 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-29 22:39:25,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 182 flow [2023-08-29 22:39:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-08-29 22:39:25,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388578522656735 [2023-08-29 22:39:25,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-08-29 22:39:25,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-08-29 22:39:25,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:25,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-08-29 22:39:25,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,866 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 106 flow. Second operand 3 states and 707 transitions. [2023-08-29 22:39:25,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 182 flow [2023-08-29 22:39:25,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:25,867 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 119 flow [2023-08-29 22:39:25,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-29 22:39:25,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-29 22:39:25,869 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 119 flow [2023-08-29 22:39:25,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:25,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:25,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:39:25,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:26,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:26,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:26,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1000578, now seen corresponding path program 1 times [2023-08-29 22:39:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502082594] [2023-08-29 22:39:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:26,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:26,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:26,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:39:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:39:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:26,182 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:26,183 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:26,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:26,310 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 22:39:26,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502082594] [2023-08-29 22:39:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502082594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:26,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:39:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270130321] [2023-08-29 22:39:26,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:39:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:39:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:39:27,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-29 22:39:27,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:27,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:27,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-29 22:39:27,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:28,948 INFO L130 PetriNetUnfolder]: 1817/2985 cut-off events. [2023-08-29 22:39:28,949 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 22:39:28,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 2985 events. 1817/2985 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 17023 event pairs, 1540 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 6040. Up to 749 conditions per place. [2023-08-29 22:39:28,962 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 132 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-08-29 22:39:28,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 145 transitions, 676 flow [2023-08-29 22:39:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:39:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:39:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1429 transitions. [2023-08-29 22:39:28,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435133457479826 [2023-08-29 22:39:28,967 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1429 transitions. [2023-08-29 22:39:28,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1429 transitions. [2023-08-29 22:39:28,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:28,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1429 transitions. [2023-08-29 22:39:28,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.16666666666666) internal successors, (1429), 6 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,978 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,978 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 119 flow. Second operand 6 states and 1429 transitions. [2023-08-29 22:39:28,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 145 transitions, 676 flow [2023-08-29 22:39:28,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 145 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:28,984 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 207 flow [2023-08-29 22:39:28,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-29 22:39:28,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-29 22:39:28,986 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 207 flow [2023-08-29 22:39:28,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:28,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:39:28,999 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 (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:29,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:29,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash 961725897, now seen corresponding path program 1 times [2023-08-29 22:39:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660001385] [2023-08-29 22:39:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:29,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:29,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:29,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:39:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:39:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:39:29,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:39:29,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660001385] [2023-08-29 22:39:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660001385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:29,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:29,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-29 22:39:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533472888] [2023-08-29 22:39:29,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:29,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:39:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:39:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:39:29,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-08-29 22:39:29,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:29,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-08-29 22:39:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:29,967 INFO L130 PetriNetUnfolder]: 455/756 cut-off events. [2023-08-29 22:39:29,968 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 22:39:29,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 756 events. 455/756 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3222 event pairs, 385 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1560. Up to 747 conditions per place. [2023-08-29 22:39:29,972 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 34 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-08-29 22:39:29,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 275 flow [2023-08-29 22:39:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:39:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:39:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1360 transitions. [2023-08-29 22:39:29,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42209807572936064 [2023-08-29 22:39:29,977 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1360 transitions. [2023-08-29 22:39:29,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1360 transitions. [2023-08-29 22:39:29,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:29,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1360 transitions. [2023-08-29 22:39:29,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.66666666666666) internal successors, (1360), 6 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,988 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 207 flow. Second operand 6 states and 1360 transitions. [2023-08-29 22:39:29,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 275 flow [2023-08-29 22:39:29,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:29,993 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 223 flow [2023-08-29 22:39:29,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-08-29 22:39:29,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-29 22:39:29,996 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 223 flow [2023-08-29 22:39:29,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:29,997 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:39:30,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:30,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:30,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:30,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:30,207 INFO L85 PathProgramCache]: Analyzing trace with hash -252281974, now seen corresponding path program 2 times [2023-08-29 22:39:30,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:30,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023650113] [2023-08-29 22:39:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:39:30,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:30,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:30,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:39:30,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:39:30,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:39:30,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:39:30,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:30,341 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:30,341 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:30,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:30,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:30,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023650113] [2023-08-29 22:39:30,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023650113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:30,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:30,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:39:30,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918104486] [2023-08-29 22:39:30,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:30,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:39:30,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:39:30,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:39:33,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-29 22:39:33,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:33,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:33,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-29 22:39:33,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:34,278 INFO L130 PetriNetUnfolder]: 909/1501 cut-off events. [2023-08-29 22:39:34,278 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-29 22:39:34,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1501 events. 909/1501 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 7567 event pairs, 770 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3096. Up to 749 conditions per place. [2023-08-29 22:39:34,285 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 68 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2023-08-29 22:39:34,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 497 flow [2023-08-29 22:39:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:39:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:39:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1574 transitions. [2023-08-29 22:39:34,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41872838520883215 [2023-08-29 22:39:34,291 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1574 transitions. [2023-08-29 22:39:34,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1574 transitions. [2023-08-29 22:39:34,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:34,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1574 transitions. [2023-08-29 22:39:34,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 224.85714285714286) internal successors, (1574), 7 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,300 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,301 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 223 flow. Second operand 7 states and 1574 transitions. [2023-08-29 22:39:34,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 497 flow [2023-08-29 22:39:34,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-29 22:39:34,303 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 239 flow [2023-08-29 22:39:34,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-29 22:39:34,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-29 22:39:34,304 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 239 flow [2023-08-29 22:39:34,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:34,306 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2023-08-29 22:39:34,317 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 22:39:34,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:34,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:34,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 769197698, now seen corresponding path program 3 times [2023-08-29 22:39:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:34,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446458878] [2023-08-29 22:39:34,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:39:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:34,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:34,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:39:34,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 22:39:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:39:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:39:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:34,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:34,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446458878] [2023-08-29 22:39:34,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446458878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:34,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:34,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:39:34,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998963916] [2023-08-29 22:39:34,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:39:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:39:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:39:35,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-08-29 22:39:35,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 218.0) internal successors, (3052), 14 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:35,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:35,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-08-29 22:39:35,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:36,121 INFO L130 PetriNetUnfolder]: 453/754 cut-off events. [2023-08-29 22:39:36,121 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 22:39:36,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 754 events. 453/754 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3223 event pairs, 385 based on Foata normal form. 6/276 useless extension candidates. Maximal degree in co-relation 1565. Up to 744 conditions per place. [2023-08-29 22:39:36,125 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 32 selfloop transitions, 12 changer transitions 0/44 dead transitions. [2023-08-29 22:39:36,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 285 flow [2023-08-29 22:39:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1788 transitions. [2023-08-29 22:39:36,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41620111731843573 [2023-08-29 22:39:36,131 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1788 transitions. [2023-08-29 22:39:36,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1788 transitions. [2023-08-29 22:39:36,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:36,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1788 transitions. [2023-08-29 22:39:36,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:36,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:36,142 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:36,142 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 239 flow. Second operand 8 states and 1788 transitions. [2023-08-29 22:39:36,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 285 flow [2023-08-29 22:39:36,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 245 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-29 22:39:36,145 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 191 flow [2023-08-29 22:39:36,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-29 22:39:36,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-29 22:39:36,147 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 191 flow [2023-08-29 22:39:36,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 218.0) internal successors, (3052), 14 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:36,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:36,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-29 22:39:36,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:36,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:36,358 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:36,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1879371511, now seen corresponding path program 2 times [2023-08-29 22:39:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886423380] [2023-08-29 22:39:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:39:36,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:36,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:36,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:39:36,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:39:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:39:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:39:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:36,494 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-29 22:39:36,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 22:39:36,641 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:39:36,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:39:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:36,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:36,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:36,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886423380] [2023-08-29 22:39:36,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886423380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:36,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:36,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:39:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68487792] [2023-08-29 22:39:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:36,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:39:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:39:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:39:36,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-08-29 22:39:36,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:36,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:36,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-08-29 22:39:36,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:37,097 INFO L130 PetriNetUnfolder]: 341/585 cut-off events. [2023-08-29 22:39:37,097 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:39:37,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 585 events. 341/585 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2375 event pairs, 288 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1219. Up to 585 conditions per place. [2023-08-29 22:39:37,100 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-29 22:39:37,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 261 flow [2023-08-29 22:39:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-08-29 22:39:37,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2023-08-29 22:39:37,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-08-29 22:39:37,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-08-29 22:39:37,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:37,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-08-29 22:39:37,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:37,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:37,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:37,109 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 191 flow. Second operand 3 states and 702 transitions. [2023-08-29 22:39:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 261 flow [2023-08-29 22:39:37,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 236 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:39:37,111 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2023-08-29 22:39:37,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-29 22:39:37,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-29 22:39:37,114 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2023-08-29 22:39:37,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:37,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:37,114 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-29 22:39:37,129 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 22:39:37,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:37,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:37,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1879371510, now seen corresponding path program 1 times [2023-08-29 22:39:37,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:37,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996794261] [2023-08-29 22:39:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:37,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:37,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:37,326 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:37,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:39:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:39:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:37,557 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:39:37,557 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 22:39:37,566 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 10 treesize of output 8 [2023-08-29 22:39:37,675 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:39:37,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:39:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:37,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:37,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996794261] [2023-08-29 22:39:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996794261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:37,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:37,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:39:37,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053622829] [2023-08-29 22:39:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:37,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:37,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:38,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-29 22:39:38,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:38,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-29 22:39:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:38,358 INFO L130 PetriNetUnfolder]: 229/416 cut-off events. [2023-08-29 22:39:38,358 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:39:38,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 416 events. 229/416 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1580 event pairs, 191 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 865. Up to 410 conditions per place. [2023-08-29 22:39:38,360 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 22:39:38,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 220 flow [2023-08-29 22:39:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:39:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:39:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 918 transitions. [2023-08-29 22:39:38,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273743016759777 [2023-08-29 22:39:38,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 918 transitions. [2023-08-29 22:39:38,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 918 transitions. [2023-08-29 22:39:38,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:38,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 918 transitions. [2023-08-29 22:39:38,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,369 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,369 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 4 states and 918 transitions. [2023-08-29 22:39:38,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 220 flow [2023-08-29 22:39:38,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:38,370 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2023-08-29 22:39:38,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-29 22:39:38,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-29 22:39:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2023-08-29 22:39:38,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:38,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-29 22:39:38,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:38,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:38,582 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:38,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2105233734, now seen corresponding path program 1 times [2023-08-29 22:39:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:38,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428107960] [2023-08-29 22:39:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:38,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:38,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:39:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:39:38,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:38,797 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 22:39:38,798 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-29 22:39:38,834 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:39:38,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:39:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:38,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:38,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428107960] [2023-08-29 22:39:38,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428107960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:38,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:38,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:39:38,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046961735] [2023-08-29 22:39:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:39:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:39:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:39:38,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2023-08-29 22:39:38,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:38,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2023-08-29 22:39:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:39,086 INFO L130 PetriNetUnfolder]: 214/386 cut-off events. [2023-08-29 22:39:39,086 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 22:39:39,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 386 events. 214/386 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1438 event pairs, 178 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 806. Up to 386 conditions per place. [2023-08-29 22:39:39,088 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-29 22:39:39,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 215 flow [2023-08-29 22:39:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-29 22:39:39,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954686530105524 [2023-08-29 22:39:39,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-29 22:39:39,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-29 22:39:39,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:39,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-29 22:39:39,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 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 22:39:39,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:39,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:39,096 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 3 states and 692 transitions. [2023-08-29 22:39:39,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 215 flow [2023-08-29 22:39:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:39,098 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 138 flow [2023-08-29 22:39:39,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-29 22:39:39,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-29 22:39:39,098 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 138 flow [2023-08-29 22:39:39,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:39,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:39,099 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-29 22:39:39,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:39,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:39,310 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:39,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2105233735, now seen corresponding path program 1 times [2023-08-29 22:39:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:39,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870027882] [2023-08-29 22:39:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:39,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:39,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:39,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:39:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:39:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:39,530 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 22:39:39,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 22:39:39,538 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 39 treesize of output 37 [2023-08-29 22:39:39,592 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:39:39,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:39:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:39,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:39,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:39,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870027882] [2023-08-29 22:39:39,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870027882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:39,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:39,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:39:39,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663401044] [2023-08-29 22:39:39,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:39,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:39,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:39,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:39,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-29 22:39:39,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:39,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:39,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-29 22:39:39,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:40,098 INFO L130 PetriNetUnfolder]: 199/356 cut-off events. [2023-08-29 22:39:40,098 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:39:40,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 356 events. 199/356 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1301 event pairs, 165 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 746. Up to 350 conditions per place. [2023-08-29 22:39:40,100 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 34 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-29 22:39:40,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 206 flow [2023-08-29 22:39:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:39:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:39:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 914 transitions. [2023-08-29 22:39:40,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425512104283054 [2023-08-29 22:39:40,103 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 914 transitions. [2023-08-29 22:39:40,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 914 transitions. [2023-08-29 22:39:40,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:40,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 914 transitions. [2023-08-29 22:39:40,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,108 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 138 flow. Second operand 4 states and 914 transitions. [2023-08-29 22:39:40,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 206 flow [2023-08-29 22:39:40,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:40,110 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 137 flow [2023-08-29 22:39:40,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-29 22:39:40,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-29 22:39:40,111 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 137 flow [2023-08-29 22:39:40,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:40,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:40,124 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 22:39:40,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:40,322 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:40,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash 837737791, now seen corresponding path program 1 times [2023-08-29 22:39:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:40,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630959153] [2023-08-29 22:39:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:40,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:40,325 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:40,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:39:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:39:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:40,527 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:39:40,527 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:39:40,561 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:39:40,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:39:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:40,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:40,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:40,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630959153] [2023-08-29 22:39:40,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630959153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:40,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:39:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930642573] [2023-08-29 22:39:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:40,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:40,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-29 22:39:40,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:40,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-29 22:39:40,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:40,876 INFO L130 PetriNetUnfolder]: 153/278 cut-off events. [2023-08-29 22:39:40,877 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:39:40,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 278 events. 153/278 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 905 event pairs, 123 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 590. Up to 272 conditions per place. [2023-08-29 22:39:40,878 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-29 22:39:40,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 201 flow [2023-08-29 22:39:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:39:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:39:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 880 transitions. [2023-08-29 22:39:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409683426443203 [2023-08-29 22:39:40,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 880 transitions. [2023-08-29 22:39:40,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 880 transitions. [2023-08-29 22:39:40,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:40,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 880 transitions. [2023-08-29 22:39:40,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,886 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 137 flow. Second operand 4 states and 880 transitions. [2023-08-29 22:39:40,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 201 flow [2023-08-29 22:39:40,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:40,888 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 134 flow [2023-08-29 22:39:40,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-29 22:39:40,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-29 22:39:40,889 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 134 flow [2023-08-29 22:39:40,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:40,889 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:40,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-29 22:39:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:41,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:41,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 837737792, now seen corresponding path program 1 times [2023-08-29 22:39:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906631755] [2023-08-29 22:39:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:41,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:41,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:41,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:39:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:39:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:41,385 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:39:41,386 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:39:41,422 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:41,422 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:41,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:41,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:41,499 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:41,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:41,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:41,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906631755] [2023-08-29 22:39:41,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906631755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:41,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:41,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:39:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218641341] [2023-08-29 22:39:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:41,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2023-08-29 22:39:41,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 213.6) internal successors, (1068), 5 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:41,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:41,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2023-08-29 22:39:41,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:42,107 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-08-29 22:39:42,107 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:39:42,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 474 events. 265/474 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2031 event pairs, 123 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 988. Up to 272 conditions per place. [2023-08-29 22:39:42,110 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 48 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-29 22:39:42,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 277 flow [2023-08-29 22:39:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-08-29 22:39:42,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41154562383612664 [2023-08-29 22:39:42,113 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-08-29 22:39:42,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-08-29 22:39:42,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:42,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-08-29 22:39:42,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,119 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 134 flow. Second operand 5 states and 1105 transitions. [2023-08-29 22:39:42,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 277 flow [2023-08-29 22:39:42,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:42,121 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 147 flow [2023-08-29 22:39:42,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-29 22:39:42,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-29 22:39:42,121 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 147 flow [2023-08-29 22:39:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.6) internal successors, (1068), 5 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:42,122 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:42,132 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 (14)] Ended with exit code 0 [2023-08-29 22:39:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:42,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:42,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash 837737829, now seen corresponding path program 1 times [2023-08-29 22:39:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016047595] [2023-08-29 22:39:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:42,335 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:42,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 22:39:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:39:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:42,477 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:39:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:42,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:42,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:42,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016047595] [2023-08-29 22:39:42,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016047595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:42,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:42,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:39:42,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101466545] [2023-08-29 22:39:42,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:42,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:42,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:42,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-29 22:39:42,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:42,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-29 22:39:42,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:42,770 INFO L130 PetriNetUnfolder]: 191/348 cut-off events. [2023-08-29 22:39:42,771 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-29 22:39:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 348 events. 191/348 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1223 event pairs, 155 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 795. Up to 336 conditions per place. [2023-08-29 22:39:42,773 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-29 22:39:42,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 33 transitions, 209 flow [2023-08-29 22:39:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:39:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:39:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 878 transitions. [2023-08-29 22:39:42,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40875232774674114 [2023-08-29 22:39:42,776 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 878 transitions. [2023-08-29 22:39:42,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 878 transitions. [2023-08-29 22:39:42,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:42,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 878 transitions. [2023-08-29 22:39:42,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,781 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 147 flow. Second operand 4 states and 878 transitions. [2023-08-29 22:39:42,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 33 transitions, 209 flow [2023-08-29 22:39:42,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 203 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:42,782 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 141 flow [2023-08-29 22:39:42,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-29 22:39:42,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-29 22:39:42,783 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 141 flow [2023-08-29 22:39:42,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:42,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:42,784 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:42,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:42,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:42,994 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:42,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 837737831, now seen corresponding path program 1 times [2023-08-29 22:39:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:42,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503048943] [2023-08-29 22:39:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:42,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:42,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:42,996 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:42,996 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 (16)] Waiting until timeout for monitored process [2023-08-29 22:39:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:39:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:43,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:43,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:43,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503048943] [2023-08-29 22:39:43,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503048943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:43,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:43,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:39:43,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892776722] [2023-08-29 22:39:43,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:43,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:43,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2023-08-29 22:39:43,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:43,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:43,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2023-08-29 22:39:43,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:43,669 INFO L130 PetriNetUnfolder]: 174/319 cut-off events. [2023-08-29 22:39:43,669 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-29 22:39:43,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 319 events. 174/319 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1163 event pairs, 87 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 724. Up to 198 conditions per place. [2023-08-29 22:39:43,671 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-29 22:39:43,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 266 flow [2023-08-29 22:39:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1120 transitions. [2023-08-29 22:39:43,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171322160148976 [2023-08-29 22:39:43,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1120 transitions. [2023-08-29 22:39:43,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1120 transitions. [2023-08-29 22:39:43,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:43,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1120 transitions. [2023-08-29 22:39:43,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:43,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:43,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:43,681 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 141 flow. Second operand 5 states and 1120 transitions. [2023-08-29 22:39:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 266 flow [2023-08-29 22:39:43,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:43,683 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 150 flow [2023-08-29 22:39:43,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-29 22:39:43,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-29 22:39:43,684 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 150 flow [2023-08-29 22:39:43,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:43,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:43,684 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:43,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:43,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:43,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:43,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:43,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1907201400, now seen corresponding path program 1 times [2023-08-29 22:39:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:43,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956191581] [2023-08-29 22:39:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:43,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:43,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:43,897 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:43,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 22:39:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:39:44,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:44,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:44,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:44,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956191581] [2023-08-29 22:39:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956191581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:44,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:44,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:39:44,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330279143] [2023-08-29 22:39:44,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:44,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:39:44,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:39:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:39:45,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-08-29 22:39:45,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 150 flow. Second operand has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:45,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:45,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-08-29 22:39:45,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:46,421 INFO L130 PetriNetUnfolder]: 408/733 cut-off events. [2023-08-29 22:39:46,421 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-29 22:39:46,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 733 events. 408/733 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3028 event pairs, 87 based on Foata normal form. 36/553 useless extension candidates. Maximal degree in co-relation 1685. Up to 198 conditions per place. [2023-08-29 22:39:46,425 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 88 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2023-08-29 22:39:46,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 95 transitions, 488 flow [2023-08-29 22:39:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1810 transitions. [2023-08-29 22:39:46,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213221601489758 [2023-08-29 22:39:46,430 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1810 transitions. [2023-08-29 22:39:46,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1810 transitions. [2023-08-29 22:39:46,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:46,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1810 transitions. [2023-08-29 22:39:46,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 226.25) internal successors, (1810), 8 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:46,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:46,438 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:46,438 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 150 flow. Second operand 8 states and 1810 transitions. [2023-08-29 22:39:46,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 95 transitions, 488 flow [2023-08-29 22:39:46,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 480 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:39:46,440 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 182 flow [2023-08-29 22:39:46,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2023-08-29 22:39:46,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-29 22:39:46,441 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 182 flow [2023-08-29 22:39:46,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:46,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:46,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:46,459 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 22:39:46,659 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 22:39:46,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:46,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1906378013, now seen corresponding path program 1 times [2023-08-29 22:39:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:46,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027999111] [2023-08-29 22:39:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:46,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:46,662 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 22:39:46,664 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 22:39:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:39:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:46,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:46,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:46,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027999111] [2023-08-29 22:39:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027999111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:46,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:39:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661746558] [2023-08-29 22:39:46,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:46,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:47,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2023-08-29 22:39:47,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:47,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:47,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2023-08-29 22:39:47,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:47,406 INFO L130 PetriNetUnfolder]: 627/1118 cut-off events. [2023-08-29 22:39:47,406 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-08-29 22:39:47,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 1118 events. 627/1118 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5527 event pairs, 344 based on Foata normal form. 0/768 useless extension candidates. Maximal degree in co-relation 2719. Up to 721 conditions per place. [2023-08-29 22:39:47,414 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-29 22:39:47,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 370 flow [2023-08-29 22:39:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1119 transitions. [2023-08-29 22:39:47,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41675977653631285 [2023-08-29 22:39:47,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1119 transitions. [2023-08-29 22:39:47,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1119 transitions. [2023-08-29 22:39:47,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:47,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1119 transitions. [2023-08-29 22:39:47,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:47,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:47,424 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:47,424 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 182 flow. Second operand 5 states and 1119 transitions. [2023-08-29 22:39:47,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 370 flow [2023-08-29 22:39:47,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:47,427 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 193 flow [2023-08-29 22:39:47,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2023-08-29 22:39:47,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-29 22:39:47,427 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 193 flow [2023-08-29 22:39:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:47,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:47,428 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:47,441 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 (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:47,638 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 22:39:47,638 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:47,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1906378143, now seen corresponding path program 1 times [2023-08-29 22:39:47,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:47,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776543385] [2023-08-29 22:39:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:47,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:47,640 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 22:39:47,641 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 22:39:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:47,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:39:47,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:47,905 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:39:47,906 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:39:47,960 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:47,960 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:48,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:48,029 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:48,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:48,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:48,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776543385] [2023-08-29 22:39:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776543385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:48,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:48,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:39:48,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399260569] [2023-08-29 22:39:48,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:48,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:48,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:48,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2023-08-29 22:39:48,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 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 22:39:48,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:48,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2023-08-29 22:39:48,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:48,622 INFO L130 PetriNetUnfolder]: 554/993 cut-off events. [2023-08-29 22:39:48,622 INFO L131 PetriNetUnfolder]: For 645/645 co-relation queries the response was YES. [2023-08-29 22:39:48,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2687 conditions, 993 events. 554/993 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4743 event pairs, 344 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 2666. Up to 727 conditions per place. [2023-08-29 22:39:48,627 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 49 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-29 22:39:48,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 373 flow [2023-08-29 22:39:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1098 transitions. [2023-08-29 22:39:48,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40893854748603353 [2023-08-29 22:39:48,631 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1098 transitions. [2023-08-29 22:39:48,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1098 transitions. [2023-08-29 22:39:48,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:48,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1098 transitions. [2023-08-29 22:39:48,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:48,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:48,636 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:48,637 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 193 flow. Second operand 5 states and 1098 transitions. [2023-08-29 22:39:48,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 373 flow [2023-08-29 22:39:48,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:48,639 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 199 flow [2023-08-29 22:39:48,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-29 22:39:48,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-08-29 22:39:48,640 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 199 flow [2023-08-29 22:39:48,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 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 22:39:48,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:48,640 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:48,653 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 22:39:48,851 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 22:39:48,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:48,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:48,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1907201361, now seen corresponding path program 1 times [2023-08-29 22:39:48,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:48,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64749366] [2023-08-29 22:39:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:48,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:48,853 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 22:39:48,856 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 22:39:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:39:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:49,136 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:49,137 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:49,171 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:39:49,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:39:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:49,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:49,230 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:49,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:49,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:49,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64749366] [2023-08-29 22:39:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64749366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:49,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:49,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:39:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921455189] [2023-08-29 22:39:49,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:39:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:39:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:39:52,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:39:55,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:39:57,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 537 [2023-08-29 22:39:57,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:57,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:57,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 537 [2023-08-29 22:39:57,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:58,327 INFO L130 PetriNetUnfolder]: 485/876 cut-off events. [2023-08-29 22:39:58,327 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-29 22:39:58,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 876 events. 485/876 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3849 event pairs, 81 based on Foata normal form. 48/798 useless extension candidates. Maximal degree in co-relation 2489. Up to 227 conditions per place. [2023-08-29 22:39:58,331 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 87 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2023-08-29 22:39:58,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 97 transitions, 589 flow [2023-08-29 22:39:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1758 transitions. [2023-08-29 22:39:58,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092178770949721 [2023-08-29 22:39:58,335 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1758 transitions. [2023-08-29 22:39:58,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1758 transitions. [2023-08-29 22:39:58,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:58,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1758 transitions. [2023-08-29 22:39:58,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 219.75) internal successors, (1758), 8 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:58,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:58,341 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:58,341 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 199 flow. Second operand 8 states and 1758 transitions. [2023-08-29 22:39:58,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 97 transitions, 589 flow [2023-08-29 22:39:58,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 559 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-29 22:39:58,344 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 230 flow [2023-08-29 22:39:58,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2023-08-29 22:39:58,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-08-29 22:39:58,345 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 230 flow [2023-08-29 22:39:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:58,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:58,346 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:58,357 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 22:39:58,557 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 22:39:58,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:39:58,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1031814743, now seen corresponding path program 1 times [2023-08-29 22:39:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822025413] [2023-08-29 22:39:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:58,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:58,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:58,562 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 22:39:58,606 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 (21)] Waiting until timeout for monitored process [2023-08-29 22:39:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:58,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:39:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:58,882 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:39:58,882 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:39:58,917 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:39:58,917 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:39:58,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:58,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:58,988 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:58,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:59,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:39:59,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:59,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822025413] [2023-08-29 22:39:59,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822025413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:59,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:59,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:39:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951516701] [2023-08-29 22:39:59,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:39:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:39:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:40:01,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-08-29 22:40:01,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 213.2) internal successors, (2132), 10 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:01,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:01,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-08-29 22:40:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:01,708 INFO L130 PetriNetUnfolder]: 1061/1896 cut-off events. [2023-08-29 22:40:01,708 INFO L131 PetriNetUnfolder]: For 2942/2942 co-relation queries the response was YES. [2023-08-29 22:40:01,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 1896 events. 1061/1896 cut-off events. For 2942/2942 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10293 event pairs, 299 based on Foata normal form. 138/1850 useless extension candidates. Maximal degree in co-relation 5719. Up to 640 conditions per place. [2023-08-29 22:40:01,726 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 105 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2023-08-29 22:40:01,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 910 flow [2023-08-29 22:40:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:40:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:40:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1770 transitions. [2023-08-29 22:40:01,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41201117318435754 [2023-08-29 22:40:01,730 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1770 transitions. [2023-08-29 22:40:01,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1770 transitions. [2023-08-29 22:40:01,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:01,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1770 transitions. [2023-08-29 22:40:01,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 221.25) internal successors, (1770), 8 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:01,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:01,738 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:01,738 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 230 flow. Second operand 8 states and 1770 transitions. [2023-08-29 22:40:01,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 910 flow [2023-08-29 22:40:01,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 787 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-29 22:40:01,743 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 243 flow [2023-08-29 22:40:01,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-29 22:40:01,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2023-08-29 22:40:01,744 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 243 flow [2023-08-29 22:40:01,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 213.2) internal successors, (2132), 10 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:01,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:01,744 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:01,756 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 22:40:01,956 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 22:40:01,956 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:01,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1031814873, now seen corresponding path program 1 times [2023-08-29 22:40:01,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:01,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536155138] [2023-08-29 22:40:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:01,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:01,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:01,958 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 22:40:01,959 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 22:40:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:02,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:40:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:02,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:40:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:02,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:40:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:02,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536155138] [2023-08-29 22:40:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536155138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:40:02,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:40:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:40:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362006022] [2023-08-29 22:40:02,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:40:02,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:40:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:40:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:40:03,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-08-29 22:40:03,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 243 flow. Second operand has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:03,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:03,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-08-29 22:40:03,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:04,621 INFO L130 PetriNetUnfolder]: 869/1566 cut-off events. [2023-08-29 22:40:04,622 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2023-08-29 22:40:04,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 1566 events. 869/1566 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8113 event pairs, 237 based on Foata normal form. 138/1676 useless extension candidates. Maximal degree in co-relation 4904. Up to 524 conditions per place. [2023-08-29 22:40:04,629 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-08-29 22:40:04,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 109 transitions, 797 flow [2023-08-29 22:40:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:40:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:40:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1799 transitions. [2023-08-29 22:40:04,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41876163873370575 [2023-08-29 22:40:04,633 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1799 transitions. [2023-08-29 22:40:04,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1799 transitions. [2023-08-29 22:40:04,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:04,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1799 transitions. [2023-08-29 22:40:04,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.875) internal successors, (1799), 8 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:04,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:04,640 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:04,640 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 243 flow. Second operand 8 states and 1799 transitions. [2023-08-29 22:40:04,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 109 transitions, 797 flow [2023-08-29 22:40:04,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 786 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:40:04,645 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 261 flow [2023-08-29 22:40:04,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2023-08-29 22:40:04,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2023-08-29 22:40:04,646 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 261 flow [2023-08-29 22:40:04,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:04,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:04,647 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:04,661 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 22:40:04,858 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 22:40:04,858 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:04,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 292861853, now seen corresponding path program 2 times [2023-08-29 22:40:04,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:04,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197707532] [2023-08-29 22:40:04,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:04,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:04,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:04,860 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 22:40:04,861 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 22:40:05,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:40:05,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:05,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:40:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:05,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:40:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:05,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:40:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:05,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:05,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197707532] [2023-08-29 22:40:05,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197707532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:40:05,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:40:05,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 22:40:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220038477] [2023-08-29 22:40:05,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:40:05,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:40:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:40:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:40:09,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-08-29 22:40:09,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 261 flow. Second operand has 16 states, 16 states have (on average 216.625) internal successors, (3466), 16 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:09,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:09,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-08-29 22:40:09,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:11,001 INFO L130 PetriNetUnfolder]: 1061/1906 cut-off events. [2023-08-29 22:40:11,001 INFO L131 PetriNetUnfolder]: For 3696/3696 co-relation queries the response was YES. [2023-08-29 22:40:11,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1906 events. 1061/1906 cut-off events. For 3696/3696 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10225 event pairs, 237 based on Foata normal form. 46/1918 useless extension candidates. Maximal degree in co-relation 6437. Up to 524 conditions per place. [2023-08-29 22:40:11,010 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 133 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2023-08-29 22:40:11,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 1061 flow [2023-08-29 22:40:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:40:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:40:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2250 transitions. [2023-08-29 22:40:11,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41899441340782123 [2023-08-29 22:40:11,014 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2250 transitions. [2023-08-29 22:40:11,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2250 transitions. [2023-08-29 22:40:11,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:11,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2250 transitions. [2023-08-29 22:40:11,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 225.0) internal successors, (2250), 10 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 22:40:11,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:11,021 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:11,021 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 261 flow. Second operand 10 states and 2250 transitions. [2023-08-29 22:40:11,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 1061 flow [2023-08-29 22:40:11,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 1024 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-29 22:40:11,030 INFO L231 Difference]: Finished difference. Result has 74 places, 43 transitions, 273 flow [2023-08-29 22:40:11,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=273, PETRI_PLACES=74, PETRI_TRANSITIONS=43} [2023-08-29 22:40:11,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-08-29 22:40:11,031 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 43 transitions, 273 flow [2023-08-29 22:40:11,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 216.625) internal successors, (3466), 16 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:11,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:11,032 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:11,047 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 22:40:11,244 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 22:40:11,245 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:11,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash 292861983, now seen corresponding path program 2 times [2023-08-29 22:40:11,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:11,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003497833] [2023-08-29 22:40:11,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:11,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:11,247 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 22:40:11,247 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 22:40:11,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:40:11,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:40:11,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:11,459 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:40:11,459 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:40:11,497 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:40:11,497 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:40:11,558 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:40:11,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:11,570 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:40:11,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:40:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:40:11,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:11,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003497833] [2023-08-29 22:40:11,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003497833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:11,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:11,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:40:11,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134101613] [2023-08-29 22:40:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:11,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:40:11,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:40:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:40:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-08-29 22:40:12,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 43 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:12,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:12,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-08-29 22:40:12,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:12,318 INFO L130 PetriNetUnfolder]: 889/1612 cut-off events. [2023-08-29 22:40:12,319 INFO L131 PetriNetUnfolder]: For 2438/2438 co-relation queries the response was YES. [2023-08-29 22:40:12,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 1612 events. 889/1612 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8239 event pairs, 815 based on Foata normal form. 88/1700 useless extension candidates. Maximal degree in co-relation 5257. Up to 1600 conditions per place. [2023-08-29 22:40:12,325 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 37 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-29 22:40:12,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 40 transitions, 334 flow [2023-08-29 22:40:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:40:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:40:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1079 transitions. [2023-08-29 22:40:12,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40186219739292367 [2023-08-29 22:40:12,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1079 transitions. [2023-08-29 22:40:12,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1079 transitions. [2023-08-29 22:40:12,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:12,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1079 transitions. [2023-08-29 22:40:12,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.8) internal successors, (1079), 5 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:12,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:12,332 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:12,332 INFO L175 Difference]: Start difference. First operand has 74 places, 43 transitions, 273 flow. Second operand 5 states and 1079 transitions. [2023-08-29 22:40:12,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 40 transitions, 334 flow [2023-08-29 22:40:12,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 40 transitions, 310 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-29 22:40:12,338 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 236 flow [2023-08-29 22:40:12,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2023-08-29 22:40:12,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2023-08-29 22:40:12,338 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 236 flow [2023-08-29 22:40:12,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:12,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:12,339 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:12,349 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 22:40:12,548 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 22:40:12,549 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:12,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash 488791719, now seen corresponding path program 3 times [2023-08-29 22:40:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747018523] [2023-08-29 22:40:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:40:12,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:12,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:12,550 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 22:40:12,551 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 22:40:13,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 22:40:13,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:40:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:13,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:40:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:13,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:13,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747018523] [2023-08-29 22:40:13,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747018523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:40:13,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:40:13,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:40:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200058851] [2023-08-29 22:40:13,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:40:13,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:40:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:40:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:40:13,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 537 [2023-08-29 22:40:13,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 236 flow. Second operand has 14 states, 14 states have (on average 227.57142857142858) internal successors, (3186), 14 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:13,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:13,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 537 [2023-08-29 22:40:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:14,158 INFO L130 PetriNetUnfolder]: 784/1463 cut-off events. [2023-08-29 22:40:14,158 INFO L131 PetriNetUnfolder]: For 1620/1620 co-relation queries the response was YES. [2023-08-29 22:40:14,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1463 events. 784/1463 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7616 event pairs, 48 based on Foata normal form. 88/1551 useless extension candidates. Maximal degree in co-relation 4161. Up to 264 conditions per place. [2023-08-29 22:40:14,164 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 125 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-08-29 22:40:14,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 939 flow [2023-08-29 22:40:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:40:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:40:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1898 transitions. [2023-08-29 22:40:14,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44180633147113596 [2023-08-29 22:40:14,172 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1898 transitions. [2023-08-29 22:40:14,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1898 transitions. [2023-08-29 22:40:14,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:14,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1898 transitions. [2023-08-29 22:40:14,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 237.25) internal successors, (1898), 8 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:14,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:14,180 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:14,180 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 236 flow. Second operand 8 states and 1898 transitions. [2023-08-29 22:40:14,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 939 flow [2023-08-29 22:40:14,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 131 transitions, 921 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 22:40:14,185 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 210 flow [2023-08-29 22:40:14,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2023-08-29 22:40:14,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2023-08-29 22:40:14,186 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 210 flow [2023-08-29 22:40:14,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 227.57142857142858) internal successors, (3186), 14 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:14,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:14,187 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:14,203 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 22:40:14,400 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 22:40:14,401 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:14,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 105872388, now seen corresponding path program 2 times [2023-08-29 22:40:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840997726] [2023-08-29 22:40:14,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:14,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:14,404 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 22:40:14,407 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 22:40:14,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:40:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:14,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:40:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:14,694 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:40:14,694 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:40:14,732 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:40:14,733 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:40:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:14,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:14,799 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:40:14,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:40:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:14,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:40:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:15,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840997726] [2023-08-29 22:40:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840997726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:40:15,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:40:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 22:40:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150319893] [2023-08-29 22:40:15,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:40:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:40:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:40:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:40:19,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-08-29 22:40:19,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 210 flow. Second operand has 16 states, 16 states have (on average 213.0) internal successors, (3408), 16 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:19,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:19,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-08-29 22:40:19,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:21,905 INFO L130 PetriNetUnfolder]: 1591/2974 cut-off events. [2023-08-29 22:40:21,905 INFO L131 PetriNetUnfolder]: For 2526/2526 co-relation queries the response was YES. [2023-08-29 22:40:21,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 2974 events. 1591/2974 cut-off events. For 2526/2526 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 16173 event pairs, 153 based on Foata normal form. 168/3142 useless extension candidates. Maximal degree in co-relation 8460. Up to 540 conditions per place. [2023-08-29 22:40:21,917 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 188 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2023-08-29 22:40:21,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 202 transitions, 1252 flow [2023-08-29 22:40:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 22:40:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 22:40:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3110 transitions. [2023-08-29 22:40:21,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41367384942803936 [2023-08-29 22:40:21,936 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3110 transitions. [2023-08-29 22:40:21,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3110 transitions. [2023-08-29 22:40:21,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:21,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3110 transitions. [2023-08-29 22:40:21,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 222.14285714285714) internal successors, (3110), 14 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:21,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:21,945 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:21,946 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 210 flow. Second operand 14 states and 3110 transitions. [2023-08-29 22:40:21,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 202 transitions, 1252 flow [2023-08-29 22:40:21,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 202 transitions, 1131 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:40:21,952 INFO L231 Difference]: Finished difference. Result has 77 places, 44 transitions, 304 flow [2023-08-29 22:40:21,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304, PETRI_PLACES=77, PETRI_TRANSITIONS=44} [2023-08-29 22:40:21,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2023-08-29 22:40:21,953 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 44 transitions, 304 flow [2023-08-29 22:40:21,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 213.0) internal successors, (3408), 16 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:21,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:21,954 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:21,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-08-29 22:40:22,166 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 22:40:22,166 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:22,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1672271916, now seen corresponding path program 1 times [2023-08-29 22:40:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:22,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706138997] [2023-08-29 22:40:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:22,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:22,168 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 22:40:22,170 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 22:40:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:40:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:22,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:22,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:22,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706138997] [2023-08-29 22:40:22,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706138997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:22,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:22,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915863568] [2023-08-29 22:40:22,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:22,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-08-29 22:40:22,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 44 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:22,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:22,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-08-29 22:40:22,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:22,930 INFO L130 PetriNetUnfolder]: 1589/2972 cut-off events. [2023-08-29 22:40:22,930 INFO L131 PetriNetUnfolder]: For 3270/3270 co-relation queries the response was YES. [2023-08-29 22:40:22,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 2972 events. 1589/2972 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 16656 event pairs, 1319 based on Foata normal form. 2/2974 useless extension candidates. Maximal degree in co-relation 8895. Up to 2525 conditions per place. [2023-08-29 22:40:22,940 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 81 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-29 22:40:22,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 811 flow [2023-08-29 22:40:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:40:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:40:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 937 transitions. [2023-08-29 22:40:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436219739292365 [2023-08-29 22:40:22,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 937 transitions. [2023-08-29 22:40:22,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 937 transitions. [2023-08-29 22:40:22,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:22,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 937 transitions. [2023-08-29 22:40:22,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:22,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:22,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:22,947 INFO L175 Difference]: Start difference. First operand has 77 places, 44 transitions, 304 flow. Second operand 4 states and 937 transitions. [2023-08-29 22:40:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 811 flow [2023-08-29 22:40:22,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 743 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-29 22:40:22,955 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 294 flow [2023-08-29 22:40:22,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2023-08-29 22:40:22,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2023-08-29 22:40:22,956 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 294 flow [2023-08-29 22:40:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:22,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:22,956 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:22,970 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 22:40:23,167 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 22:40:23,168 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:23,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1610188816, now seen corresponding path program 2 times [2023-08-29 22:40:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307660116] [2023-08-29 22:40:23,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:23,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:23,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:23,170 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 22:40:23,172 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 22:40:23,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:40:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:40:23,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:23,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:23,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:23,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307660116] [2023-08-29 22:40:23,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307660116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:23,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:23,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:23,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468389987] [2023-08-29 22:40:23,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:23,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:23,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:23,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-08-29 22:40:23,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:23,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:23,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-08-29 22:40:23,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:23,952 INFO L130 PetriNetUnfolder]: 1585/2968 cut-off events. [2023-08-29 22:40:23,952 INFO L131 PetriNetUnfolder]: For 3007/3007 co-relation queries the response was YES. [2023-08-29 22:40:23,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 2968 events. 1585/2968 cut-off events. For 3007/3007 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16332 event pairs, 1422 based on Foata normal form. 4/2972 useless extension candidates. Maximal degree in co-relation 9498. Up to 2712 conditions per place. [2023-08-29 22:40:23,962 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 67 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-08-29 22:40:23,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 540 flow [2023-08-29 22:40:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:40:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:40:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 936 transitions. [2023-08-29 22:40:23,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2023-08-29 22:40:23,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 936 transitions. [2023-08-29 22:40:23,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 936 transitions. [2023-08-29 22:40:23,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:23,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 936 transitions. [2023-08-29 22:40:23,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:23,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:23,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:23,968 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 294 flow. Second operand 4 states and 936 transitions. [2023-08-29 22:40:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 540 flow [2023-08-29 22:40:23,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 22:40:23,976 INFO L231 Difference]: Finished difference. Result has 78 places, 46 transitions, 304 flow [2023-08-29 22:40:23,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2023-08-29 22:40:23,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2023-08-29 22:40:23,976 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 304 flow [2023-08-29 22:40:23,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:23,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:23,977 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:23,983 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 22:40:24,177 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 22:40:24,177 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:24,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1666920102, now seen corresponding path program 3 times [2023-08-29 22:40:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229350904] [2023-08-29 22:40:24,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:40:24,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:24,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:24,179 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 22:40:24,180 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 22:40:24,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 22:40:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:40:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:24,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:24,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229350904] [2023-08-29 22:40:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229350904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:24,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:24,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325528190] [2023-08-29 22:40:24,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:24,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:24,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-08-29 22:40:24,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:24,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-08-29 22:40:24,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:24,977 INFO L130 PetriNetUnfolder]: 1706/3177 cut-off events. [2023-08-29 22:40:24,978 INFO L131 PetriNetUnfolder]: For 3934/3934 co-relation queries the response was YES. [2023-08-29 22:40:24,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10440 conditions, 3177 events. 1706/3177 cut-off events. For 3934/3934 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 17774 event pairs, 1319 based on Foata normal form. 88/3265 useless extension candidates. Maximal degree in co-relation 10410. Up to 2613 conditions per place. [2023-08-29 22:40:24,992 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 84 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-29 22:40:24,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 805 flow [2023-08-29 22:40:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:40:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:40:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 930 transitions. [2023-08-29 22:40:24,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329608938547486 [2023-08-29 22:40:24,994 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 930 transitions. [2023-08-29 22:40:24,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 930 transitions. [2023-08-29 22:40:24,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:24,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 930 transitions. [2023-08-29 22:40:24,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,997 INFO L175 Difference]: Start difference. First operand has 78 places, 46 transitions, 304 flow. Second operand 4 states and 930 transitions. [2023-08-29 22:40:24,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 805 flow [2023-08-29 22:40:25,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 795 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:40:25,005 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 331 flow [2023-08-29 22:40:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2023-08-29 22:40:25,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-08-29 22:40:25,005 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 331 flow [2023-08-29 22:40:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:25,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:25,006 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:25,013 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 (29)] Ended with exit code 0 [2023-08-29 22:40:25,210 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 22:40:25,210 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:25,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:25,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1484187432, now seen corresponding path program 4 times [2023-08-29 22:40:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:25,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808855677] [2023-08-29 22:40:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:40:25,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:25,212 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 22:40:25,213 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 22:40:25,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:40:25,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:25,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:40:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:25,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:25,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808855677] [2023-08-29 22:40:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808855677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:25,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:25,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:25,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743901510] [2023-08-29 22:40:25,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:25,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:25,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2023-08-29 22:40:25,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:25,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:25,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2023-08-29 22:40:25,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:25,992 INFO L130 PetriNetUnfolder]: 1585/2946 cut-off events. [2023-08-29 22:40:25,992 INFO L131 PetriNetUnfolder]: For 3804/3804 co-relation queries the response was YES. [2023-08-29 22:40:26,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10054 conditions, 2946 events. 1585/2946 cut-off events. For 3804/3804 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 16448 event pairs, 12 based on Foata normal form. 88/3034 useless extension candidates. Maximal degree in co-relation 10022. Up to 2700 conditions per place. [2023-08-29 22:40:26,006 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 70 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2023-08-29 22:40:26,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 677 flow [2023-08-29 22:40:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:40:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:40:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-29 22:40:26,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43202979515828677 [2023-08-29 22:40:26,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-29 22:40:26,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-29 22:40:26,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:26,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-29 22:40:26,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:26,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:26,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:26,011 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 331 flow. Second operand 4 states and 928 transitions. [2023-08-29 22:40:26,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 677 flow [2023-08-29 22:40:26,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 670 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:40:26,021 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 355 flow [2023-08-29 22:40:26,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2023-08-29 22:40:26,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-08-29 22:40:26,022 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 355 flow [2023-08-29 22:40:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:26,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:26,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:26,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-29 22:40:26,232 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 22:40:26,233 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:26,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -615401300, now seen corresponding path program 1 times [2023-08-29 22:40:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:26,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493343088] [2023-08-29 22:40:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:26,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:26,235 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 22:40:26,235 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 22:40:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:40:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-29 22:40:26,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:26,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493343088] [2023-08-29 22:40:26,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493343088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:26,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:26,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845078929] [2023-08-29 22:40:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:26,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:26,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2023-08-29 22:40:26,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:26,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:26,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2023-08-29 22:40:26,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:27,097 INFO L130 PetriNetUnfolder]: 1635/3030 cut-off events. [2023-08-29 22:40:27,098 INFO L131 PetriNetUnfolder]: For 6953/6953 co-relation queries the response was YES. [2023-08-29 22:40:27,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 3030 events. 1635/3030 cut-off events. For 6953/6953 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 16892 event pairs, 159 based on Foata normal form. 22/3052 useless extension candidates. Maximal degree in co-relation 10462. Up to 2662 conditions per place. [2023-08-29 22:40:27,109 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 70 selfloop transitions, 7 changer transitions 1/78 dead transitions. [2023-08-29 22:40:27,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 713 flow [2023-08-29 22:40:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:40:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:40:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 927 transitions. [2023-08-29 22:40:27,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43156424581005587 [2023-08-29 22:40:27,111 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 927 transitions. [2023-08-29 22:40:27,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 927 transitions. [2023-08-29 22:40:27,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:27,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 927 transitions. [2023-08-29 22:40:27,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:27,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:27,114 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:27,114 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 355 flow. Second operand 4 states and 927 transitions. [2023-08-29 22:40:27,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 713 flow [2023-08-29 22:40:27,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 697 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 22:40:27,121 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 392 flow [2023-08-29 22:40:27,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2023-08-29 22:40:27,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-08-29 22:40:27,122 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 392 flow [2023-08-29 22:40:27,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:27,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:27,122 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:27,133 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 (31)] Ended with exit code 0 [2023-08-29 22:40:27,335 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 22:40:27,336 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:27,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1225860184, now seen corresponding path program 2 times [2023-08-29 22:40:27,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:27,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824495869] [2023-08-29 22:40:27,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:27,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:27,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:27,338 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 22:40:27,338 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 22:40:27,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:40:27,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:40:27,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:40:27,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:27,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:27,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824495869] [2023-08-29 22:40:27,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824495869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:27,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:27,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590382802] [2023-08-29 22:40:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:27,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-08-29 22:40:27,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:27,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:27,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-08-29 22:40:27,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:28,171 INFO L130 PetriNetUnfolder]: 1584/2925 cut-off events. [2023-08-29 22:40:28,171 INFO L131 PetriNetUnfolder]: For 5855/5855 co-relation queries the response was YES. [2023-08-29 22:40:28,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 2925 events. 1584/2925 cut-off events. For 5855/5855 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 15741 event pairs, 1163 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 10193. Up to 2709 conditions per place. [2023-08-29 22:40:28,183 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 66 selfloop transitions, 7 changer transitions 3/76 dead transitions. [2023-08-29 22:40:28,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 653 flow [2023-08-29 22:40:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:40:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:40:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-29 22:40:28,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43202979515828677 [2023-08-29 22:40:28,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-29 22:40:28,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-29 22:40:28,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:28,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-29 22:40:28,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:28,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:28,188 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:28,188 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 392 flow. Second operand 4 states and 928 transitions. [2023-08-29 22:40:28,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 653 flow [2023-08-29 22:40:28,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 76 transitions, 643 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:40:28,199 INFO L231 Difference]: Finished difference. Result has 88 places, 52 transitions, 416 flow [2023-08-29 22:40:28,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=88, PETRI_TRANSITIONS=52} [2023-08-29 22:40:28,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-08-29 22:40:28,199 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 52 transitions, 416 flow [2023-08-29 22:40:28,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:28,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:28,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:28,213 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 22:40:28,410 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 22:40:28,411 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:40:28,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:28,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1813639431, now seen corresponding path program 1 times [2023-08-29 22:40:28,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:28,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059725742] [2023-08-29 22:40:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:28,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:28,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:28,413 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 22:40:28,413 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 22:40:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 22:40:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:29,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:40:29,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 557 treesize of output 317 [2023-08-29 22:40:50,428 WARN L222 SmtUtils]: Spent 18.27s on a formula simplification. DAG size of input: 97 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:41:09,624 WARN L222 SmtUtils]: Spent 17.90s on a formula simplification. DAG size of input: 80 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:41:18,618 WARN L222 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:41:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:41:19,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:42:05,021 WARN L222 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 362 DAG size of output: 234 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:42:05,023 INFO L321 Elim1Store]: treesize reduction 420, result has 66.7 percent of original size [2023-08-29 22:42:05,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 500 treesize of output 963 Killed by 15