./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i --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/goblint-regression/09-regions_24-evilcollapse_nr.i -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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --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 21:23:30,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:23:30,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:23:30,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:23:30,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:23:30,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:23:30,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:23:30,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:23:30,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:23:30,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:23:30,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:23:30,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:23:30,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:23:30,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:23:30,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:23:30,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:23:30,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:23:30,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:23:30,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:23:30,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:23:30,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:23:30,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:23:30,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:23:30,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:23:30,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:23:30,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:23:30,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:23:30,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:23:30,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:23:30,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:23:30,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:23:30,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:23:30,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:23:30,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:23:30,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:23:30,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:23:30,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:23:30,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:23:30,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:23:30,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:23:30,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:23:30,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:23:30,911 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:23:30,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:23:30,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:23:30,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:23:30,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:23:30,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:23:30,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:23:30,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:23:30,917 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:23:30,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:23:30,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:23:30,918 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:23:30,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:23:30,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:23:30,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:23:30,919 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:23:30,919 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:23:30,919 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:23:30,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:23:30,920 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:23:30,920 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:23:30,920 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:23:30,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:23:30,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:23:30,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:23:30,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:23:30,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:23:30,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:23:30,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:23:30,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:23:30,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:23:30,922 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:23:30,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:23:30,922 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:23:30,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:23:31,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:23:31,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:23:31,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:23:31,233 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:23:31,234 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:23:31,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-08-29 21:23:32,364 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:23:32,597 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:23:32,598 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-08-29 21:23:32,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce9f09ce/f68ec6f738724c8e876ea729815a7bb0/FLAG8a3c0111e [2023-08-29 21:23:32,625 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce9f09ce/f68ec6f738724c8e876ea729815a7bb0 [2023-08-29 21:23:32,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:23:32,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:23:32,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:23:32,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:23:32,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:23:32,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:23:32" (1/1) ... [2023-08-29 21:23:32,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e05665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:32, skipping insertion in model container [2023-08-29 21:23:32,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:23:32" (1/1) ... [2023-08-29 21:23:32,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:23:32,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:23:33,012 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:33,013 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:33,014 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:33,016 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:33,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:23:33,074 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 21:23:33,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@505e08c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:33, skipping insertion in model container [2023-08-29 21:23:33,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:23:33,076 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 21:23:33,077 INFO L158 Benchmark]: Toolchain (without parser) took 448.44ms. Allocated memory was 67.1MB in the beginning and 102.8MB in the end (delta: 35.7MB). Free memory was 37.3MB in the beginning and 78.8MB in the end (delta: -41.4MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2023-08-29 21:23:33,078 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:23:33,079 INFO L158 Benchmark]: CACSL2BoogieTranslator took 446.80ms. Allocated memory was 67.1MB in the beginning and 102.8MB in the end (delta: 35.7MB). Free memory was 37.1MB in the beginning and 78.8MB in the end (delta: -41.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2023-08-29 21:23:33,080 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 446.80ms. Allocated memory was 67.1MB in the beginning and 102.8MB in the end (delta: 35.7MB). Free memory was 37.1MB in the beginning and 78.8MB in the end (delta: -41.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: 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/goblint-regression/09-regions_24-evilcollapse_nr.i -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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --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 21:23:34,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:23:34,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:23:34,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:23:34,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:23:34,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:23:34,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:23:34,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:23:34,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:23:34,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:23:34,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:23:34,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:23:34,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:23:34,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:23:34,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:23:34,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:23:34,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:23:34,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:23:34,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:23:34,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:23:34,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:23:34,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:23:34,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:23:34,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:23:34,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:23:34,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:23:34,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:23:34,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:23:34,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:23:34,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:23:34,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:23:34,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:23:34,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:23:34,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:23:34,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:23:34,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:23:34,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:23:34,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:23:34,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:23:34,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:23:34,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:23:34,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 21:23:34,824 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:23:34,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:23:34,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:23:34,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:23:34,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:23:34,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:23:34,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:23:34,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:23:34,827 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:23:34,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:23:34,828 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:23:34,828 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:23:34,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:23:34,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:23:34,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:23:34,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:23:34,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:23:34,829 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:23:34,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:23:34,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:23:34,830 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 21:23:34,830 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 21:23:34,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:23:34,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:23:34,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:23:34,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:23:34,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:23:34,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:23:34,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:23:34,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:23:34,832 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 21:23:34,832 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 21:23:34,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:23:34,832 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:23:34,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:23:34,833 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 21:23:34,833 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:23:34,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:23:35,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:23:35,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:23:35,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:23:35,143 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:23:35,144 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:23:35,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-08-29 21:23:36,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:23:36,619 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:23:36,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-08-29 21:23:36,632 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5fd73e5/ed3c13bcfb7c47c6a88bf119929baaed/FLAG99c22f983 [2023-08-29 21:23:36,643 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5fd73e5/ed3c13bcfb7c47c6a88bf119929baaed [2023-08-29 21:23:36,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:23:36,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:23:36,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:23:36,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:23:36,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:23:36,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:23:36" (1/1) ... [2023-08-29 21:23:36,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc6a035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:36, skipping insertion in model container [2023-08-29 21:23:36,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:23:36" (1/1) ... [2023-08-29 21:23:36,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:23:36,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:23:37,114 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,114 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,115 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,116 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:23:37,183 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 21:23:37,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:23:37,236 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,236 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,236 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,237 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:23:37,266 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:23:37,303 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,303 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,304 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,304 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-29 21:23:37,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:23:37,386 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:23:37,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37 WrapperNode [2023-08-29 21:23:37,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:23:37,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:23:37,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:23:37,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:23:37,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,460 INFO L138 Inliner]: procedures = 276, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 157 [2023-08-29 21:23:37,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:23:37,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:23:37,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:23:37,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:23:37,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:23:37,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:23:37,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:23:37,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:23:37,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (1/1) ... [2023-08-29 21:23:37,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:23:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:23:37,569 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 21:23:37,584 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 21:23:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 21:23:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-08-29 21:23:37,609 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-08-29 21:23:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:23:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-29 21:23:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:23:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 21:23:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:23:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 21:23:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:23:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-29 21:23:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:23:37,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:23:37,612 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:23:37,824 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:23:37,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:23:38,246 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:23:38,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:23:38,254 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 21:23:38,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:23:38 BoogieIcfgContainer [2023-08-29 21:23:38,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:23:38,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:23:38,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:23:38,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:23:38,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:23:36" (1/3) ... [2023-08-29 21:23:38,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4035c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:23:38, skipping insertion in model container [2023-08-29 21:23:38,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:23:37" (2/3) ... [2023-08-29 21:23:38,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4035c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:23:38, skipping insertion in model container [2023-08-29 21:23:38,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:23:38" (3/3) ... [2023-08-29 21:23:38,262 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2023-08-29 21:23:38,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:23:38,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-08-29 21:23:38,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:23:38,384 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:23:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 256 transitions, 522 flow [2023-08-29 21:23:38,478 INFO L130 PetriNetUnfolder]: 17/254 cut-off events. [2023-08-29 21:23:38,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:23:38,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 254 events. 17/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 678 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-08-29 21:23:38,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 256 transitions, 522 flow [2023-08-29 21:23:38,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 254 transitions, 514 flow [2023-08-29 21:23:38,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:23:38,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 254 transitions, 514 flow [2023-08-29 21:23:38,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 254 transitions, 514 flow [2023-08-29 21:23:38,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 254 transitions, 514 flow [2023-08-29 21:23:38,579 INFO L130 PetriNetUnfolder]: 17/254 cut-off events. [2023-08-29 21:23:38,579 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:23:38,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 254 events. 17/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 683 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-08-29 21:23:38,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 7680 [2023-08-29 21:27:29,191 WARN L222 SmtUtils]: Spent 2.19m on a formula simplification. DAG size of input: 224 DAG size of output: 216 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:28:33,481 WARN L222 SmtUtils]: Spent 1.07m on a formula simplification that was a NOOP. DAG size: 212 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:30:44,385 WARN L222 SmtUtils]: Spent 2.18m on a formula simplification. DAG size of input: 224 DAG size of output: 216 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:31:45,261 WARN L222 SmtUtils]: Spent 1.01m on a formula simplification that was a NOOP. DAG size: 212 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:32:41,245 INFO L134 LiptonReduction]: Checked pairs total: 11909 [2023-08-29 21:32:41,246 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-08-29 21:32:41,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:32:41,261 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;@6da1b334, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:32:41,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-08-29 21:32:41,263 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:32:41,263 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:32:41,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:32:41,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:32:41,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:32:41,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:32:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 28412, now seen corresponding path program 1 times [2023-08-29 21:32:41,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:32:41,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919859052] [2023-08-29 21:32:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:32:41,279 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 21:32:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:32:41,289 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 21:32:41,301 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 21:32:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:32:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-29 21:32:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:32:41,418 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 21:32:41,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:32:41,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:32:41,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919859052] [2023-08-29 21:32:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919859052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:32:41,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:32:41,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:32:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043192685] [2023-08-29 21:32:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:32:41,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:32:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:32:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:32:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:32:41,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 570 [2023-08-29 21:32:41,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 245.0) internal successors, (490), 2 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:41,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:32:41,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 570 [2023-08-29 21:32:41,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:32:42,673 INFO L130 PetriNetUnfolder]: 1547/2403 cut-off events. [2023-08-29 21:32:42,673 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 21:32:42,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 2403 events. 1547/2403 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11228 event pairs, 1313 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 4796. Up to 2404 conditions per place. [2023-08-29 21:32:42,688 INFO L137 encePairwiseOnDemand]: 555/570 looper letters, 56 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2023-08-29 21:32:42,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 230 flow [2023-08-29 21:32:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:32:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:32:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 559 transitions. [2023-08-29 21:32:42,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903508771929825 [2023-08-29 21:32:42,712 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 559 transitions. [2023-08-29 21:32:42,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 559 transitions. [2023-08-29 21:32:42,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:32:42,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 559 transitions. [2023-08-29 21:32:42,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 279.5) internal successors, (559), 2 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:42,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 570.0) internal successors, (1710), 3 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:42,730 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 570.0) internal successors, (1710), 3 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:42,736 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 148 flow. Second operand 2 states and 559 transitions. [2023-08-29 21:32:42,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 230 flow [2023-08-29 21:32:42,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:32:42,741 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 116 flow [2023-08-29 21:32:42,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-29 21:32:42,746 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -16 predicate places. [2023-08-29 21:32:42,746 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 116 flow [2023-08-29 21:32:42,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 245.0) internal successors, (490), 2 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:42,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:32:42,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:32:42,759 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 21:32:42,949 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 21:32:42,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:32:42,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:32:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 28504, now seen corresponding path program 1 times [2023-08-29 21:32:42,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:32:42,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044670639] [2023-08-29 21:32:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:32:42,951 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 21:32:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:32:42,953 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 21:32:42,954 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 21:32:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:32:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 21:32:43,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:32:43,051 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 21:32:43,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:32:43,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:32:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044670639] [2023-08-29 21:32:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044670639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:32:43,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:32:43,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:32:43,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188464597] [2023-08-29 21:32:43,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:32:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:32:43,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:32:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:32:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:32:43,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 570 [2023-08-29 21:32:43,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:43,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:32:43,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 570 [2023-08-29 21:32:43,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:32:44,456 INFO L130 PetriNetUnfolder]: 1548/2413 cut-off events. [2023-08-29 21:32:44,456 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:32:44,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 2413 events. 1548/2413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11262 event pairs, 1313 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 4856. Up to 2404 conditions per place. [2023-08-29 21:32:44,475 INFO L137 encePairwiseOnDemand]: 561/570 looper letters, 64 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-29 21:32:44,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 268 flow [2023-08-29 21:32:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:32:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:32:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-08-29 21:32:44,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637426900584795 [2023-08-29 21:32:44,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-08-29 21:32:44,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-08-29 21:32:44,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:32:44,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-08-29 21:32:44,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:44,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:44,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:44,486 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 116 flow. Second operand 3 states and 793 transitions. [2023-08-29 21:32:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 268 flow [2023-08-29 21:32:44,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:32:44,488 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 140 flow [2023-08-29 21:32:44,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-29 21:32:44,489 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-08-29 21:32:44,489 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 140 flow [2023-08-29 21:32:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:44,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:32:44,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:32:44,501 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 (3)] Ended with exit code 0 [2023-08-29 21:32:44,698 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 21:32:44,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:32:44,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:32:44,699 INFO L85 PathProgramCache]: Analyzing trace with hash 28414, now seen corresponding path program 1 times [2023-08-29 21:32:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:32:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712177039] [2023-08-29 21:32:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:32:44,700 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 21:32:44,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:32:44,702 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 21:32:44,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 21:32:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:32:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 21:32:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:32:44,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:44,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:44,894 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 21:32:44,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-29 21:32:44,937 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 21:32:44,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:32:44,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:32:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712177039] [2023-08-29 21:32:44,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712177039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:32:44,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:32:44,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:32:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607438863] [2023-08-29 21:32:44,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:32:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:32:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:32:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:32:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:32:45,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 570 [2023-08-29 21:32:45,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:45,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:32:45,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 570 [2023-08-29 21:32:45,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:32:47,518 INFO L130 PetriNetUnfolder]: 1551/2416 cut-off events. [2023-08-29 21:32:47,519 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:32:47,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4880 conditions, 2416 events. 1551/2416 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11271 event pairs, 1313 based on Foata normal form. 0/1127 useless extension candidates. Maximal degree in co-relation 4875. Up to 2413 conditions per place. [2023-08-29 21:32:47,529 INFO L137 encePairwiseOnDemand]: 562/570 looper letters, 59 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-08-29 21:32:47,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 285 flow [2023-08-29 21:32:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:32:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:32:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2023-08-29 21:32:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-29 21:32:47,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2023-08-29 21:32:47,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2023-08-29 21:32:47,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:32:47,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2023-08-29 21:32:47,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:47,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:47,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:47,544 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 140 flow. Second operand 3 states and 780 transitions. [2023-08-29 21:32:47,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 285 flow [2023-08-29 21:32:47,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:32:47,547 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 177 flow [2023-08-29 21:32:47,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-08-29 21:32:47,550 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2023-08-29 21:32:47,550 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 177 flow [2023-08-29 21:32:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:47,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:32:47,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:32:47,559 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 21:32:47,759 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 21:32:47,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:32:47,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:32:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 28415, now seen corresponding path program 1 times [2023-08-29 21:32:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:32:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980008838] [2023-08-29 21:32:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:32:47,761 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 21:32:47,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:32:47,763 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 21:32:47,766 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 21:32:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:32:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:32:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:32:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:47,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:47,866 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 21:32:47,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2023-08-29 21:32:47,889 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 21:32:47,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:32:47,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:32:47,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980008838] [2023-08-29 21:32:47,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980008838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:32:47,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:32:47,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:32:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104235167] [2023-08-29 21:32:47,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:32:47,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:32:47,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:32:47,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:32:47,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:32:48,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 570 [2023-08-29 21:32:48,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:48,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:32:48,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 570 [2023-08-29 21:32:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:32:49,264 INFO L130 PetriNetUnfolder]: 1491/2318 cut-off events. [2023-08-29 21:32:49,264 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:32:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2318 events. 1491/2318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11931 event pairs, 249 based on Foata normal form. 3/1090 useless extension candidates. Maximal degree in co-relation 4693. Up to 1822 conditions per place. [2023-08-29 21:32:49,274 INFO L137 encePairwiseOnDemand]: 562/570 looper letters, 83 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-29 21:32:49,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 391 flow [2023-08-29 21:32:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:32:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:32:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-29 21:32:49,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2023-08-29 21:32:49,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-29 21:32:49,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-29 21:32:49,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:32:49,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-29 21:32:49,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:49,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:49,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:49,284 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 177 flow. Second operand 3 states and 800 transitions. [2023-08-29 21:32:49,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 391 flow [2023-08-29 21:32:49,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:32:49,288 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 170 flow [2023-08-29 21:32:49,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-29 21:32:49,289 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-08-29 21:32:49,290 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 170 flow [2023-08-29 21:32:49,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:32:49,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:32:49,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:32:49,305 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 21:32:49,499 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 21:32:49,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:32:49,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:32:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 27360727, now seen corresponding path program 1 times [2023-08-29 21:32:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:32:49,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680978643] [2023-08-29 21:32:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:32:49,500 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 21:32:49,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:32:49,501 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 21:32:49,502 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 21:32:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:32:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 21:32:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:32:51,393 INFO L321 Elim1Store]: treesize reduction 372, result has 28.0 percent of original size [2023-08-29 21:32:51,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 1022 treesize of output 857 [2023-08-29 21:32:51,509 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 12 treesize of output 11 [2023-08-29 21:32:51,595 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 20 treesize of output 19 [2023-08-29 21:32:51,668 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 14 treesize of output 15 [2023-08-29 21:32:51,729 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 20 treesize of output 19 [2023-08-29 21:32:51,789 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 20 treesize of output 19 [2023-08-29 21:32:53,941 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 9 treesize of output 3 [2023-08-29 21:32:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:57,514 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2023-08-29 21:32:57,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 113 [2023-08-29 21:32:57,549 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 17 treesize of output 11 [2023-08-29 21:32:57,553 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 17 treesize of output 11 [2023-08-29 21:32:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:57,692 INFO L321 Elim1Store]: treesize reduction 191, result has 11.6 percent of original size [2023-08-29 21:32:57,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1313 treesize of output 1655 [2023-08-29 21:32:57,750 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 635 treesize of output 629 [2023-08-29 21:32:57,785 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 629 treesize of output 623 [2023-08-29 21:32:58,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 287 [2023-08-29 21:32:58,362 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 287 [2023-08-29 21:32:58,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,434 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,450 INFO L321 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-08-29 21:32:58,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 307 [2023-08-29 21:32:58,503 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:32:58,528 INFO L321 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-08-29 21:32:58,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 307 [2023-08-29 21:32:58,720 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 17 treesize of output 11 [2023-08-29 21:32:58,740 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 17 treesize of output 11 [2023-08-29 21:32:59,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 19 [2023-08-29 21:32:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:32:59,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 114 [2023-08-29 21:32:59,182 INFO L321 Elim1Store]: treesize reduction 67, result has 1.5 percent of original size [2023-08-29 21:32:59,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 217 treesize of output 24 [2023-08-29 21:32:59,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 28 treesize of output 18 [2023-08-29 21:32:59,263 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 9 treesize of output 3 [2023-08-29 21:32:59,738 INFO L321 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2023-08-29 21:32:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 66 [2023-08-29 21:32:59,742 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 41 treesize of output 23 [2023-08-29 21:32:59,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 20 treesize of output 9 [2023-08-29 21:32:59,761 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 9 treesize of output 3 [2023-08-29 21:32:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:32:59,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:32:59,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:32:59,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680978643] [2023-08-29 21:32:59,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680978643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:32:59,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:32:59,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:32:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376087853] [2023-08-29 21:32:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:32:59,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:32:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:32:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:32:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:33:00,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 570 [2023-08-29 21:33:00,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:00,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:00,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 570 [2023-08-29 21:33:00,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:01,915 INFO L130 PetriNetUnfolder]: 1490/2315 cut-off events. [2023-08-29 21:33:01,916 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-29 21:33:01,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5110 conditions, 2315 events. 1490/2315 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10766 event pairs, 1257 based on Foata normal form. 0/1171 useless extension candidates. Maximal degree in co-relation 5103. Up to 2304 conditions per place. [2023-08-29 21:33:01,926 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 49 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-08-29 21:33:01,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 272 flow [2023-08-29 21:33:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:33:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:33:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 948 transitions. [2023-08-29 21:33:01,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2023-08-29 21:33:01,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 948 transitions. [2023-08-29 21:33:01,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 948 transitions. [2023-08-29 21:33:01,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:01,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 948 transitions. [2023-08-29 21:33:01,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:01,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:01,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:01,938 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 170 flow. Second operand 4 states and 948 transitions. [2023-08-29 21:33:01,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 272 flow [2023-08-29 21:33:01,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:33:01,941 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 170 flow [2023-08-29 21:33:01,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-29 21:33:01,942 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-08-29 21:33:01,942 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 170 flow [2023-08-29 21:33:01,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:01,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:01,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:33:01,959 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 21:33:02,156 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 21:33:02,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:02,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash 27360737, now seen corresponding path program 1 times [2023-08-29 21:33:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:02,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224529383] [2023-08-29 21:33:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:33:02,158 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 21:33:02,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:02,159 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 21:33:02,162 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 21:33:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:33:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-29 21:33:02,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:04,247 INFO L321 Elim1Store]: treesize reduction 188, result has 31.1 percent of original size [2023-08-29 21:33:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1022 treesize of output 797 [2023-08-29 21:33:07,489 INFO L321 Elim1Store]: treesize reduction 188, result has 31.1 percent of original size [2023-08-29 21:33:07,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1022 treesize of output 797 [2023-08-29 21:33:07,593 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 271 [2023-08-29 21:33:07,683 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 12 treesize of output 11 [2023-08-29 21:33:08,021 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 20 treesize of output 19 [2023-08-29 21:33:08,357 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 14 treesize of output 13 [2023-08-29 21:33:08,605 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 0 case distinctions, treesize of input 12 treesize of output 11 [2023-08-29 21:33:08,794 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 12 treesize of output 11 [2023-08-29 21:33:08,948 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 20 treesize of output 19 [2023-08-29 21:33:09,186 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 14 treesize of output 15 [2023-08-29 21:33:09,308 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 12 treesize of output 11 [2023-08-29 21:33:09,454 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 20 treesize of output 19 [2023-08-29 21:33:11,541 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 9 treesize of output 3 [2023-08-29 21:33:12,184 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 9 treesize of output 3 [2023-08-29 21:33:13,521 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 9 treesize of output 3 [2023-08-29 21:33:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:33:13,848 INFO L321 Elim1Store]: treesize reduction 113, result has 13.7 percent of original size [2023-08-29 21:33:13,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 844 treesize of output 853 [2023-08-29 21:33:13,885 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 521 treesize of output 515 [2023-08-29 21:33:13,905 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 515 treesize of output 509 [2023-08-29 21:33:14,263 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 9 treesize of output 3 [2023-08-29 21:33:14,303 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 9 treesize of output 3 [2023-08-29 21:33:14,868 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 9 treesize of output 3 [2023-08-29 21:33:15,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 23 [2023-08-29 21:33:15,094 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 9 treesize of output 3 [2023-08-29 21:33:15,168 INFO L321 Elim1Store]: treesize reduction 92, result has 14.8 percent of original size [2023-08-29 21:33:15,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 523 treesize of output 462 [2023-08-29 21:33:15,185 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 150 treesize of output 144 [2023-08-29 21:33:15,197 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 144 treesize of output 138 [2023-08-29 21:33:15,335 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 17 treesize of output 11 [2023-08-29 21:33:15,360 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-08-29 21:33:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:33:15,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 210 [2023-08-29 21:33:15,420 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 200 treesize of output 194 [2023-08-29 21:33:15,460 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 9 treesize of output 3 [2023-08-29 21:33:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:15,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:33:15,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224529383] [2023-08-29 21:33:15,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224529383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:33:15,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:33:15,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:33:15,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460363239] [2023-08-29 21:33:15,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:33:15,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:33:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:33:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:33:16,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 570 [2023-08-29 21:33:16,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:16,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:16,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 570 [2023-08-29 21:33:16,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:18,762 INFO L130 PetriNetUnfolder]: 1491/2317 cut-off events. [2023-08-29 21:33:18,762 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-29 21:33:18,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4954 conditions, 2317 events. 1491/2317 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10752 event pairs, 1257 based on Foata normal form. 0/1174 useless extension candidates. Maximal degree in co-relation 4947. Up to 2313 conditions per place. [2023-08-29 21:33:18,773 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 52 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-08-29 21:33:18,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 300 flow [2023-08-29 21:33:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:33:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:33:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 923 transitions. [2023-08-29 21:33:18,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40482456140350875 [2023-08-29 21:33:18,777 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 923 transitions. [2023-08-29 21:33:18,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 923 transitions. [2023-08-29 21:33:18,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:18,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 923 transitions. [2023-08-29 21:33:18,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:18,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:18,785 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:18,785 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 170 flow. Second operand 4 states and 923 transitions. [2023-08-29 21:33:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 300 flow [2023-08-29 21:33:18,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:33:18,787 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 201 flow [2023-08-29 21:33:18,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-08-29 21:33:18,788 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2023-08-29 21:33:18,788 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 201 flow [2023-08-29 21:33:18,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:18,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:18,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:33:18,805 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 21:33:19,002 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 21:33:19,002 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:19,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 882583, now seen corresponding path program 1 times [2023-08-29 21:33:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:19,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763837792] [2023-08-29 21:33:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:33:19,003 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 21:33:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:19,004 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 21:33:19,005 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 21:33:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:33:19,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-29 21:33:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:19,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-29 21:33:19,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-29 21:33:19,201 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 21:33:19,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:33:19,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763837792] [2023-08-29 21:33:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763837792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:33:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:33:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:33:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967516698] [2023-08-29 21:33:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:33:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:33:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:33:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:33:19,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 570 [2023-08-29 21:33:19,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 223.75) internal successors, (895), 4 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:19,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:19,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 570 [2023-08-29 21:33:19,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:21,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:33:22,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:33:23,277 INFO L130 PetriNetUnfolder]: 1491/2316 cut-off events. [2023-08-29 21:33:23,277 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-08-29 21:33:23,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 2316 events. 1491/2316 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10765 event pairs, 1257 based on Foata normal form. 1/1177 useless extension candidates. Maximal degree in co-relation 4954. Up to 2312 conditions per place. [2023-08-29 21:33:23,287 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 55 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-29 21:33:23,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 333 flow [2023-08-29 21:33:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:33:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:33:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 950 transitions. [2023-08-29 21:33:23,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-29 21:33:23,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 950 transitions. [2023-08-29 21:33:23,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 950 transitions. [2023-08-29 21:33:23,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:23,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 950 transitions. [2023-08-29 21:33:23,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.5) internal successors, (950), 4 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:23,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:23,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:23,297 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 201 flow. Second operand 4 states and 950 transitions. [2023-08-29 21:33:23,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 333 flow [2023-08-29 21:33:23,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 322 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-29 21:33:23,300 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 208 flow [2023-08-29 21:33:23,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-29 21:33:23,301 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2023-08-29 21:33:23,301 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 208 flow [2023-08-29 21:33:23,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.75) internal successors, (895), 4 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:23,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:23,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:33:23,320 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 21:33:23,520 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 21:33:23,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:23,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash 27360733, now seen corresponding path program 1 times [2023-08-29 21:33:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:23,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162084106] [2023-08-29 21:33:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:33:23,521 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 21:33:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:23,522 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 21:33:23,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 21:33:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:33:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 21:33:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:23,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:33:23,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:23,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162084106] [2023-08-29 21:33:23,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162084106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:33:23,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:33:23,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:33:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662205383] [2023-08-29 21:33:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:33:23,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:33:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:33:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:33:24,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 570 [2023-08-29 21:33:24,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:24,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:24,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 570 [2023-08-29 21:33:24,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:25,433 INFO L130 PetriNetUnfolder]: 1491/2315 cut-off events. [2023-08-29 21:33:25,433 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-08-29 21:33:25,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 2315 events. 1491/2315 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10741 event pairs, 1257 based on Foata normal form. 1/1176 useless extension candidates. Maximal degree in co-relation 4953. Up to 2312 conditions per place. [2023-08-29 21:33:25,442 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-29 21:33:25,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 330 flow [2023-08-29 21:33:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:33:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:33:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-29 21:33:25,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43567251461988304 [2023-08-29 21:33:25,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-29 21:33:25,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-29 21:33:25,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:25,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-29 21:33:25,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:25,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:25,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:25,450 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 208 flow. Second operand 3 states and 745 transitions. [2023-08-29 21:33:25,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 330 flow [2023-08-29 21:33:25,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 319 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 21:33:25,453 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 208 flow [2023-08-29 21:33:25,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-29 21:33:25,453 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2023-08-29 21:33:25,453 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 208 flow [2023-08-29 21:33:25,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:25,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:25,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:33:25,470 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 21:33:25,667 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 21:33:25,668 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:25,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash 27357391, now seen corresponding path program 1 times [2023-08-29 21:33:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431532061] [2023-08-29 21:33:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:33:25,669 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 21:33:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:25,670 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 21:33:25,672 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 21:33:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:33:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 21:33:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:25,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:33:25,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:25,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431532061] [2023-08-29 21:33:25,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431532061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:33:25,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:33:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:33:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872294885] [2023-08-29 21:33:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:33:25,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:33:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:33:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:33:25,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 570 [2023-08-29 21:33:25,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:25,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:25,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 570 [2023-08-29 21:33:25,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:27,440 INFO L130 PetriNetUnfolder]: 1488/2313 cut-off events. [2023-08-29 21:33:27,440 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-29 21:33:27,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 2313 events. 1488/2313 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10749 event pairs, 1257 based on Foata normal form. 2/1175 useless extension candidates. Maximal degree in co-relation 4944. Up to 2310 conditions per place. [2023-08-29 21:33:27,449 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 52 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-29 21:33:27,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 306 flow [2023-08-29 21:33:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:33:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:33:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-08-29 21:33:27,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2023-08-29 21:33:27,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-08-29 21:33:27,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-08-29 21:33:27,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:27,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-08-29 21:33:27,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:27,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:27,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:27,459 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 208 flow. Second operand 3 states and 774 transitions. [2023-08-29 21:33:27,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 306 flow [2023-08-29 21:33:27,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 56 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:33:27,462 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 198 flow [2023-08-29 21:33:27,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2023-08-29 21:33:27,463 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2023-08-29 21:33:27,463 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 198 flow [2023-08-29 21:33:27,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:27,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:27,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:33:27,473 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 21:33:27,673 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 21:33:27,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:27,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash 848180165, now seen corresponding path program 1 times [2023-08-29 21:33:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:27,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778501429] [2023-08-29 21:33:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:33:27,675 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 21:33:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:27,675 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 21:33:27,678 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 21:33:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:33:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:33:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:27,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:33:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:27,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:27,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778501429] [2023-08-29 21:33:27,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778501429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:33:27,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 21:33:27,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-29 21:33:27,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367058213] [2023-08-29 21:33:27,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 21:33:27,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:33:27,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:27,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:33:27,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:33:27,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-08-29 21:33:27,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 240.33333333333334) internal successors, (1442), 6 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:27,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:27,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-08-29 21:33:27,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:30,227 INFO L130 PetriNetUnfolder]: 1489/2322 cut-off events. [2023-08-29 21:33:30,227 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-08-29 21:33:30,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 2322 events. 1489/2322 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10797 event pairs, 1257 based on Foata normal form. 6/1188 useless extension candidates. Maximal degree in co-relation 4979. Up to 2309 conditions per place. [2023-08-29 21:33:30,235 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 54 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2023-08-29 21:33:30,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 358 flow [2023-08-29 21:33:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:33:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:33:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1496 transitions. [2023-08-29 21:33:30,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43742690058479533 [2023-08-29 21:33:30,241 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1496 transitions. [2023-08-29 21:33:30,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1496 transitions. [2023-08-29 21:33:30,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:30,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1496 transitions. [2023-08-29 21:33:30,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:30,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:30,249 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:30,249 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 198 flow. Second operand 6 states and 1496 transitions. [2023-08-29 21:33:30,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 358 flow [2023-08-29 21:33:30,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:33:30,253 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 251 flow [2023-08-29 21:33:30,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-29 21:33:30,254 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-08-29 21:33:30,254 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 251 flow [2023-08-29 21:33:30,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 240.33333333333334) internal successors, (1442), 6 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:30,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:30,255 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-29 21:33:30,270 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 21:33:30,467 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 21:33:30,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:30,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 943029839, now seen corresponding path program 2 times [2023-08-29 21:33:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:30,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258008281] [2023-08-29 21:33:30,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:33:30,468 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 21:33:30,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:30,469 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 21:33:30,470 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 21:33:30,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:33:30,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:33:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:33:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:33:31,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:33:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:33:31,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258008281] [2023-08-29 21:33:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258008281] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:33:31,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 21:33:31,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 21:33:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518554463] [2023-08-29 21:33:31,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 21:33:31,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:33:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:33:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:33:31,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-08-29 21:33:31,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:31,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:31,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-08-29 21:33:31,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:34,312 INFO L130 PetriNetUnfolder]: 1495/2355 cut-off events. [2023-08-29 21:33:34,312 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-29 21:33:34,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 2355 events. 1495/2355 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10753 event pairs, 1257 based on Foata normal form. 3/1213 useless extension candidates. Maximal degree in co-relation 5159. Up to 2301 conditions per place. [2023-08-29 21:33:34,320 INFO L137 encePairwiseOnDemand]: 560/570 looper letters, 85 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-29 21:33:34,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 687 flow [2023-08-29 21:33:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:33:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:33:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1520 transitions. [2023-08-29 21:33:34,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-29 21:33:34,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1520 transitions. [2023-08-29 21:33:34,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1520 transitions. [2023-08-29 21:33:34,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:34,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1520 transitions. [2023-08-29 21:33:34,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 253.33333333333334) internal successors, (1520), 6 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:34,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:34,345 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:34,345 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 251 flow. Second operand 6 states and 1520 transitions. [2023-08-29 21:33:34,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 687 flow [2023-08-29 21:33:34,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:33:34,348 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 354 flow [2023-08-29 21:33:34,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2023-08-29 21:33:34,349 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2023-08-29 21:33:34,349 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 354 flow [2023-08-29 21:33:34,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:34,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:34,350 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-29 21:33:34,372 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 21:33:34,568 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 21:33:34,569 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:34,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 943029749, now seen corresponding path program 1 times [2023-08-29 21:33:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:34,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535481174] [2023-08-29 21:33:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:33:34,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:33:34,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:34,571 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 21:33:34,571 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 21:33:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:33:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:33:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:35,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:33:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:35,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535481174] [2023-08-29 21:33:35,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535481174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:33:35,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 21:33:35,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-29 21:33:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792071600] [2023-08-29 21:33:35,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 21:33:35,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:33:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:33:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:33:35,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-08-29 21:33:35,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 354 flow. Second operand has 12 states, 12 states have (on average 240.16666666666666) internal successors, (2882), 12 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:35,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:35,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-08-29 21:33:35,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:38,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:33:41,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:33:52,059 INFO L130 PetriNetUnfolder]: 1495/2397 cut-off events. [2023-08-29 21:33:52,059 INFO L131 PetriNetUnfolder]: For 727/727 co-relation queries the response was YES. [2023-08-29 21:33:52,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 2397 events. 1495/2397 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10816 event pairs, 1257 based on Foata normal form. 24/1276 useless extension candidates. Maximal degree in co-relation 5397. Up to 2321 conditions per place. [2023-08-29 21:33:52,069 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 64 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2023-08-29 21:33:52,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 79 transitions, 632 flow [2023-08-29 21:33:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:33:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:33:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2945 transitions. [2023-08-29 21:33:52,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-08-29 21:33:52,076 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2945 transitions. [2023-08-29 21:33:52,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2945 transitions. [2023-08-29 21:33:52,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:33:52,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2945 transitions. [2023-08-29 21:33:52,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 245.41666666666666) internal successors, (2945), 12 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:52,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:52,091 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:52,091 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 354 flow. Second operand 12 states and 2945 transitions. [2023-08-29 21:33:52,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 79 transitions, 632 flow [2023-08-29 21:33:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 79 transitions, 618 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:33:52,095 INFO L231 Difference]: Finished difference. Result has 96 places, 72 transitions, 487 flow [2023-08-29 21:33:52,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=487, PETRI_PLACES=96, PETRI_TRANSITIONS=72} [2023-08-29 21:33:52,096 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 24 predicate places. [2023-08-29 21:33:52,096 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 72 transitions, 487 flow [2023-08-29 21:33:52,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 240.16666666666666) internal successors, (2882), 12 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:52,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:33:52,097 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-29 21:33:52,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 21:33:52,316 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 21:33:52,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:33:52,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:33:52,317 INFO L85 PathProgramCache]: Analyzing trace with hash 481585717, now seen corresponding path program 2 times [2023-08-29 21:33:52,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:33:52,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566194578] [2023-08-29 21:33:52,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:33:52,317 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 21:33:52,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:33:52,319 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 21:33:52,322 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 21:33:54,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:33:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:33:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 21:33:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:33:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:54,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:33:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:33:54,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:33:54,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566194578] [2023-08-29 21:33:54,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566194578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:33:54,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 21:33:54,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-29 21:33:54,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042079424] [2023-08-29 21:33:54,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 21:33:54,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 21:33:54,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:33:54,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 21:33:54,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 21:33:55,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-08-29 21:33:55,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 72 transitions, 487 flow. Second operand has 24 states, 24 states have (on average 240.08333333333334) internal successors, (5762), 24 states have internal predecessors, (5762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:33:55,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:33:55,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-08-29 21:33:55,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:33:57,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:01,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:11,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:22,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:24,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:25,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:27,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:30,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:37,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:38,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:41,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:45,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:49,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:53,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:54,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:56,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:34:58,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:00,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:04,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:06,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:09,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:11,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:15,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:17,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:18,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:23,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:24,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:32,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:35:45,004 INFO L130 PetriNetUnfolder]: 1495/2481 cut-off events. [2023-08-29 21:35:45,004 INFO L131 PetriNetUnfolder]: For 3833/3833 co-relation queries the response was YES. [2023-08-29 21:35:45,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 2481 events. 1495/2481 cut-off events. For 3833/3833 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10929 event pairs, 1257 based on Foata normal form. 48/1384 useless extension candidates. Maximal degree in co-relation 6044. Up to 2321 conditions per place. [2023-08-29 21:35:45,013 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 76 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2023-08-29 21:35:45,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 103 transitions, 1052 flow [2023-08-29 21:35:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 21:35:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 21:35:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5843 transitions. [2023-08-29 21:35:45,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271198830409357 [2023-08-29 21:35:45,026 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5843 transitions. [2023-08-29 21:35:45,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5843 transitions. [2023-08-29 21:35:45,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:35:45,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5843 transitions. [2023-08-29 21:35:45,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 243.45833333333334) internal successors, (5843), 24 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:35:45,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 570.0) internal successors, (14250), 25 states have internal predecessors, (14250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:35:45,055 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 570.0) internal successors, (14250), 25 states have internal predecessors, (14250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:35:45,055 INFO L175 Difference]: Start difference. First operand has 96 places, 72 transitions, 487 flow. Second operand 24 states and 5843 transitions. [2023-08-29 21:35:45,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 103 transitions, 1052 flow [2023-08-29 21:35:45,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 103 transitions, 995 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-29 21:35:45,063 INFO L231 Difference]: Finished difference. Result has 128 places, 85 transitions, 741 flow [2023-08-29 21:35:45,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=741, PETRI_PLACES=128, PETRI_TRANSITIONS=85} [2023-08-29 21:35:45,064 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 56 predicate places. [2023-08-29 21:35:45,064 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 85 transitions, 741 flow [2023-08-29 21:35:45,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 240.08333333333334) internal successors, (5762), 24 states have internal predecessors, (5762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:35:45,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:35:45,066 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-08-29 21:35:45,108 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 21:35:45,281 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 21:35:45,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-29 21:35:45,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:35:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash 622834357, now seen corresponding path program 3 times [2023-08-29 21:35:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:35:45,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473976700] [2023-08-29 21:35:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 21:35:45,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:35:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:35:45,283 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 21:35:45,285 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 21:36:20,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-08-29 21:36:20,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:36:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 3643 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:36:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 1 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:21,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 1 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:22,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:36:22,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473976700] [2023-08-29 21:36:22,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473976700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:22,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 21:36:22,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-08-29 21:36:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514458758] [2023-08-29 21:36:22,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:22,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-29 21:36:22,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:36:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-29 21:36:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-08-29 21:36:24,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-08-29 21:36:24,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 85 transitions, 741 flow. Second operand has 48 states, 48 states have (on average 240.04166666666666) internal successors, (11522), 48 states have internal predecessors, (11522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:24,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:24,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-08-29 21:36:24,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:28,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:29,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:30,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:32,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:33,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:36,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:37,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:39,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:43,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:44,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:47,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:48,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:49,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:50,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:54,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:56,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:58,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:36:59,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:02,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:03,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:05,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:06,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:08,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:09,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:12,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:14,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:17,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:19,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:20,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:21,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:24,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:25,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:26,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:28,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:40,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:41,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:45,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:47,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:37:48,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15