./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:22:35,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:22:35,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:22:35,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:22:35,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:22:35,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:22:35,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:22:35,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:22:35,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:22:35,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:22:35,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:22:35,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:22:35,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:22:35,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:22:35,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:22:35,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:22:35,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:22:35,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:22:35,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:22:35,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:22:35,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:22:35,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:22:35,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:22:35,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:22:35,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:22:35,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:22:35,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:22:35,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:22:35,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:22:35,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:22:35,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:22:35,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:22:35,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:22:35,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:22:35,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:22:35,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:22:35,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:22:35,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:22:35,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:22:35,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:22:35,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:22:35,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:22:35,866 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:22:35,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:22:35,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:22:35,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:22:35,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:22:35,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:22:35,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:22:35,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:22:35,870 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:22:35,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:22:35,871 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:22:35,871 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:22:35,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:22:35,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:22:35,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:22:35,872 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:22:35,872 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:22:35,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:22:35,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:22:35,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:22:35,873 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:22:35,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:22:35,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:22:35,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:22:35,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:22:35,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:22:35,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:22:35,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:22:35,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:22:35,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:22:35,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:22:35,875 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:22:35,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:22:35,875 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:22:35,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:22:36,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:22:36,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:22:36,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:22:36,224 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:22:36,224 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:22:36,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 07:22:37,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:22:37,687 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:22:37,687 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 07:22:37,694 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bae0e9320/5e7030736d4247b19977392a3bcf3916/FLAGbbba0fd61 [2023-08-30 07:22:37,711 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bae0e9320/5e7030736d4247b19977392a3bcf3916 [2023-08-30 07:22:37,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:22:37,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:22:37,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:22:37,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:22:37,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:22:37,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:37" (1/1) ... [2023-08-30 07:22:37,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95742ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:37, skipping insertion in model container [2023-08-30 07:22:37,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:37" (1/1) ... [2023-08-30 07:22:37,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:22:37,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:22:37,895 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c[3107,3120] [2023-08-30 07:22:37,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:22:37,935 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:22:37,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fa12755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:37, skipping insertion in model container [2023-08-30 07:22:37,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:22:37,938 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:22:37,940 INFO L158 Benchmark]: Toolchain (without parser) took 224.53ms. Allocated memory is still 90.2MB. Free memory was 68.5MB in the beginning and 58.3MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:22:37,941 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 58.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:22:37,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.68ms. Allocated memory is still 90.2MB. Free memory was 68.3MB in the beginning and 58.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:22:37,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 58.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.68ms. Allocated memory is still 90.2MB. Free memory was 68.3MB in the beginning and 58.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 126]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:22:39,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:22:39,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:22:39,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:22:39,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:22:39,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:22:39,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:22:39,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:22:39,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:22:39,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:22:39,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:22:39,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:22:39,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:22:39,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:22:39,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:22:39,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:22:39,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:22:39,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:22:39,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:22:39,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:22:39,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:22:39,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:22:39,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:22:39,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:22:39,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:22:39,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:22:39,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:22:39,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:22:39,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:22:39,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:22:39,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:22:39,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:22:39,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:22:39,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:22:39,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:22:39,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:22:39,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:22:39,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:22:39,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:22:39,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:22:39,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:22:39,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:22:39,699 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:22:39,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:22:39,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:22:39,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:22:39,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:22:39,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:22:39,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:22:39,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:22:39,703 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:22:39,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:22:39,704 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:22:39,704 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:22:39,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:22:39,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:22:39,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:22:39,705 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:22:39,705 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:22:39,705 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:22:39,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:22:39,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:22:39,706 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:22:39,706 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:22:39,706 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:22:39,706 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:22:39,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:22:39,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:22:39,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:22:39,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:22:39,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:22:39,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:22:39,708 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:22:39,708 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:22:39,708 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:22:39,708 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:22:39,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:22:39,709 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:22:39,709 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:22:39,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:22:40,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:22:40,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:22:40,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:22:40,043 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:22:40,044 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:22:40,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 07:22:41,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:22:41,537 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:22:41,537 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 07:22:41,542 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ea0bf95/c7dd0d7573ef473dbf36d3627d37eb64/FLAG5e4d189eb [2023-08-30 07:22:41,559 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ea0bf95/c7dd0d7573ef473dbf36d3627d37eb64 [2023-08-30 07:22:41,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:22:41,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:22:41,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:22:41,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:22:41,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:22:41,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:41,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee6bced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41, skipping insertion in model container [2023-08-30 07:22:41,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:41,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:22:41,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:22:41,740 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c[3107,3120] [2023-08-30 07:22:41,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:22:41,775 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:22:41,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:22:41,811 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c[3107,3120] [2023-08-30 07:22:41,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:22:41,830 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:22:41,866 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c[3107,3120] [2023-08-30 07:22:41,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:22:41,895 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:22:41,897 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:22:41,904 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:22:41,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41 WrapperNode [2023-08-30 07:22:41,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:22:41,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:22:41,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:22:41,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:22:41,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:41,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:41,968 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 161 [2023-08-30 07:22:41,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:22:41,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:22:41,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:22:41,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:22:41,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:41,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,018 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:22:42,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:22:42,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:22:42,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:22:42,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (1/1) ... [2023-08-30 07:22:42,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:22:42,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:22:42,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:22:42,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:22:42,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:22:42,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:22:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:22:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:22:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:22:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:22:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:22:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:22:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:22:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:22:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:22:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:22:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:22:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:22:42,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:22:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:22:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:22:42,101 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:22:42,279 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:22:42,281 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:22:42,716 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:22:42,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:22:42,904 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:22:42,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:22:42 BoogieIcfgContainer [2023-08-30 07:22:42,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:22:42,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:22:42,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:22:42,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:22:42,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:22:41" (1/3) ... [2023-08-30 07:22:42,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349c5fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:22:42, skipping insertion in model container [2023-08-30 07:22:42,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:41" (2/3) ... [2023-08-30 07:22:42,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349c5fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:22:42, skipping insertion in model container [2023-08-30 07:22:42,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:22:42" (3/3) ... [2023-08-30 07:22:42,919 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2023-08-30 07:22:42,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:22:42,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 07:22:42,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:22:43,035 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:22:43,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 156 transitions, 336 flow [2023-08-30 07:22:43,140 INFO L130 PetriNetUnfolder]: 10/153 cut-off events. [2023-08-30 07:22:43,141 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:22:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 10/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 178 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-30 07:22:43,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 156 transitions, 336 flow [2023-08-30 07:22:43,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 149 transitions, 316 flow [2023-08-30 07:22:43,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:22:43,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 149 transitions, 316 flow [2023-08-30 07:22:43,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 149 transitions, 316 flow [2023-08-30 07:22:43,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 316 flow [2023-08-30 07:22:43,215 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2023-08-30 07:22:43,215 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:22:43,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 149 events. 10/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-30 07:22:43,218 INFO L119 LiptonReduction]: Number of co-enabled transitions 2058 [2023-08-30 07:22:58,608 INFO L134 LiptonReduction]: Checked pairs total: 3546 [2023-08-30 07:22:58,608 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-30 07:22:58,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:22:58,624 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;@39479164, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:22:58,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-30 07:22:58,627 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:22:58,627 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:22:58,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:22:58,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:22:58,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:22:58,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:22:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 20927, now seen corresponding path program 1 times [2023-08-30 07:22:58,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:22:58,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064138410] [2023-08-30 07:22:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:22:58,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:22:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:22:58,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:22:58,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:22:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:22:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:22:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:22:58,858 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:22:58,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:22:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:22:58,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:22:58,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:22:58,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064138410] [2023-08-30 07:22:58,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064138410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:22:58,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:22:58,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:22:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384547033] [2023-08-30 07:22:58,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:22:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:22:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:22:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:22:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:22:59,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 307 [2023-08-30 07:22:59,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:59,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:22:59,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 307 [2023-08-30 07:22:59,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:22:59,565 INFO L130 PetriNetUnfolder]: 1020/1600 cut-off events. [2023-08-30 07:22:59,565 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 07:22:59,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 1600 events. 1020/1600 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 8772 event pairs, 993 based on Foata normal form. 0/667 useless extension candidates. Maximal degree in co-relation 2917. Up to 1573 conditions per place. [2023-08-30 07:22:59,579 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 07:22:59,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 184 flow [2023-08-30 07:22:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:22:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:22:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-30 07:22:59,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723127035830619 [2023-08-30 07:22:59,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-30 07:22:59,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-30 07:22:59,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:22:59,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-30 07:22:59,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:59,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:59,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:59,622 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 108 flow. Second operand 3 states and 435 transitions. [2023-08-30 07:22:59,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 184 flow [2023-08-30 07:22:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:22:59,631 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2023-08-30 07:22:59,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-30 07:22:59,642 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 07:22:59,642 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2023-08-30 07:22:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:22:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:22:59,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:22:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:22:59,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:22:59,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:22:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 20979, now seen corresponding path program 1 times [2023-08-30 07:22:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:22:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020478026] [2023-08-30 07:22:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:22:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:22:59,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:22:59,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:22:59,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:22:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:22:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:22:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:22:59,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:22:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:22:59,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:22:59,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:23:00,022 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 07:23:00,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:23:00,054 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:23:00,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 07:23:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:00,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:00,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:00,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020478026] [2023-08-30 07:23:00,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020478026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:00,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:00,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:00,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227427956] [2023-08-30 07:23:00,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:00,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 307 [2023-08-30 07:23:00,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:00,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:00,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 307 [2023-08-30 07:23:00,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:00,544 INFO L130 PetriNetUnfolder]: 846/1345 cut-off events. [2023-08-30 07:23:00,544 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:23:00,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 1345 events. 846/1345 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7191 event pairs, 819 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 2707. Up to 1318 conditions per place. [2023-08-30 07:23:00,553 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 07:23:00,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 166 flow [2023-08-30 07:23:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-30 07:23:00,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733984799131379 [2023-08-30 07:23:00,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-30 07:23:00,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-30 07:23:00,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:00,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-30 07:23:00,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:00,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:00,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:00,561 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 436 transitions. [2023-08-30 07:23:00,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 166 flow [2023-08-30 07:23:00,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:00,563 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 91 flow [2023-08-30 07:23:00,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 07:23:00,564 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 07:23:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 91 flow [2023-08-30 07:23:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:00,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:23:00,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:00,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:00,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash 20978, now seen corresponding path program 1 times [2023-08-30 07:23:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:00,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390137747] [2023-08-30 07:23:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:00,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:00,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:00,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:00,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:23:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:00,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:23:00,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:00,903 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 07:23:00,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 07:23:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:00,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:00,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:00,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390137747] [2023-08-30 07:23:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390137747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:00,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:00,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:00,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740891156] [2023-08-30 07:23:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:01,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 307 [2023-08-30 07:23:01,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:01,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:01,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 307 [2023-08-30 07:23:01,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:01,416 INFO L130 PetriNetUnfolder]: 672/1090 cut-off events. [2023-08-30 07:23:01,417 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:23:01,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 1090 events. 672/1090 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 5672 event pairs, 645 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 2197. Up to 1063 conditions per place. [2023-08-30 07:23:01,423 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 35 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 07:23:01,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 159 flow [2023-08-30 07:23:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-30 07:23:01,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46796959826275786 [2023-08-30 07:23:01,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-30 07:23:01,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-30 07:23:01,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:01,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-30 07:23:01,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:01,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:01,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:01,430 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 91 flow. Second operand 3 states and 431 transitions. [2023-08-30 07:23:01,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 159 flow [2023-08-30 07:23:01,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:01,432 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 88 flow [2023-08-30 07:23:01,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-30 07:23:01,433 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 07:23:01,433 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 88 flow [2023-08-30 07:23:01,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:01,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:01,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:23:01,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:01,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:01,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:01,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:01,643 INFO L85 PathProgramCache]: Analyzing trace with hash 20928, now seen corresponding path program 1 times [2023-08-30 07:23:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:01,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111369825] [2023-08-30 07:23:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:01,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:01,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:01,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:01,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:23:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:23:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:01,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:23:01,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:23:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:01,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:01,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:01,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111369825] [2023-08-30 07:23:01,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111369825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:01,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:01,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:01,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463563193] [2023-08-30 07:23:01,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:01,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 307 [2023-08-30 07:23:01,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:01,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:01,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 307 [2023-08-30 07:23:01,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:02,425 INFO L130 PetriNetUnfolder]: 1343/2178 cut-off events. [2023-08-30 07:23:02,426 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:23:02,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4400 conditions, 2178 events. 1343/2178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 13223 event pairs, 1290 based on Foata normal form. 0/1032 useless extension candidates. Maximal degree in co-relation 4392. Up to 1064 conditions per place. [2023-08-30 07:23:02,436 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 68 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-30 07:23:02,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 73 transitions, 302 flow [2023-08-30 07:23:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 07:23:02,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503800217155266 [2023-08-30 07:23:02,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 07:23:02,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 07:23:02,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:02,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 07:23:02,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:02,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:02,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:02,443 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 88 flow. Second operand 3 states and 464 transitions. [2023-08-30 07:23:02,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 73 transitions, 302 flow [2023-08-30 07:23:02,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 73 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:02,445 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 99 flow [2023-08-30 07:23:02,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-30 07:23:02,446 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 07:23:02,446 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 99 flow [2023-08-30 07:23:02,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:02,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:02,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:23:02,457 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 [2023-08-30 07:23:02,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:02,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:02,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash 650600, now seen corresponding path program 1 times [2023-08-30 07:23:02,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:02,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721432626] [2023-08-30 07:23:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:02,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:02,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:23:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:02,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:23:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:02,829 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:23:02,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:23:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:02,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:23:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:03,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:03,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721432626] [2023-08-30 07:23:03,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721432626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:23:03,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:23:03,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:23:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633603917] [2023-08-30 07:23:03,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:23:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:23:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:23:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:23:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-08-30 07:23:03,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:03,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:03,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-08-30 07:23:03,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:04,303 INFO L130 PetriNetUnfolder]: 2016/3270 cut-off events. [2023-08-30 07:23:04,304 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:23:04,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6612 conditions, 3270 events. 2016/3270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 21474 event pairs, 1935 based on Foata normal form. 0/1556 useless extension candidates. Maximal degree in co-relation 6602. Up to 1063 conditions per place. [2023-08-30 07:23:04,321 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 101 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2023-08-30 07:23:04,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 111 transitions, 475 flow [2023-08-30 07:23:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:23:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:23:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 867 transitions. [2023-08-30 07:23:04,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47068403908794787 [2023-08-30 07:23:04,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 867 transitions. [2023-08-30 07:23:04,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 867 transitions. [2023-08-30 07:23:04,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:04,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 867 transitions. [2023-08-30 07:23:04,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.5) internal successors, (867), 6 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:04,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:04,331 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:04,331 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 99 flow. Second operand 6 states and 867 transitions. [2023-08-30 07:23:04,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 111 transitions, 475 flow [2023-08-30 07:23:04,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 111 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:04,335 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 151 flow [2023-08-30 07:23:04,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 07:23:04,337 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 07:23:04,337 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 151 flow [2023-08-30 07:23:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:04,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:04,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:23:04,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:04,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:04,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:04,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 20174006, now seen corresponding path program 1 times [2023-08-30 07:23:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:04,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222118552] [2023-08-30 07:23:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:04,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:04,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:04,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:04,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:23:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:04,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:23:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:04,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:23:04,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:23:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:23:04,708 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 07:23:04,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 07:23:04,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 07:23:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:04,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:04,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222118552] [2023-08-30 07:23:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222118552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:04,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:04,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882689308] [2023-08-30 07:23:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:04,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 307 [2023-08-30 07:23:04,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:04,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:04,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 307 [2023-08-30 07:23:04,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:05,342 INFO L130 PetriNetUnfolder]: 1938/3129 cut-off events. [2023-08-30 07:23:05,343 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:23:05,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6355 conditions, 3129 events. 1938/3129 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 20540 event pairs, 1857 based on Foata normal form. 0/1515 useless extension candidates. Maximal degree in co-relation 6340. Up to 3048 conditions per place. [2023-08-30 07:23:05,364 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 07:23:05,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 227 flow [2023-08-30 07:23:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-30 07:23:05,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46905537459283386 [2023-08-30 07:23:05,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-30 07:23:05,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-30 07:23:05,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:05,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-30 07:23:05,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:05,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:05,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:05,371 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 151 flow. Second operand 3 states and 432 transitions. [2023-08-30 07:23:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 227 flow [2023-08-30 07:23:05,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:05,375 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 139 flow [2023-08-30 07:23:05,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-30 07:23:05,377 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 07:23:05,378 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 139 flow [2023-08-30 07:23:05,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:05,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:05,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:23:05,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:05,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:05,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:05,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash 20174005, now seen corresponding path program 1 times [2023-08-30 07:23:05,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:05,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104064240] [2023-08-30 07:23:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:05,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:05,595 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:05,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:23:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:05,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:23:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:05,735 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:23:05,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 07:23:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:05,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:05,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104064240] [2023-08-30 07:23:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104064240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:05,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:05,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:05,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630687341] [2023-08-30 07:23:05,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:05,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:05,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:05,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 307 [2023-08-30 07:23:05,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:05,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:05,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 307 [2023-08-30 07:23:05,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:06,346 INFO L130 PetriNetUnfolder]: 1860/2988 cut-off events. [2023-08-30 07:23:06,346 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:23:06,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6070 conditions, 2988 events. 1860/2988 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 19632 event pairs, 1779 based on Foata normal form. 0/1479 useless extension candidates. Maximal degree in co-relation 6054. Up to 2907 conditions per place. [2023-08-30 07:23:06,361 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 07:23:06,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 211 flow [2023-08-30 07:23:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-30 07:23:06,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46362649294245384 [2023-08-30 07:23:06,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-30 07:23:06,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-30 07:23:06,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:06,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-30 07:23:06,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:06,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:06,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:06,367 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 139 flow. Second operand 3 states and 427 transitions. [2023-08-30 07:23:06,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 211 flow [2023-08-30 07:23:06,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:06,368 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 136 flow [2023-08-30 07:23:06,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-30 07:23:06,369 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 07:23:06,369 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 136 flow [2023-08-30 07:23:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:06,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:06,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:23:06,381 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 [2023-08-30 07:23:06,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:06,579 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:06,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash 625389365, now seen corresponding path program 1 times [2023-08-30 07:23:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:06,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879039955] [2023-08-30 07:23:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:06,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:06,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:06,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:06,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:23:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:06,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:23:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:06,718 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:23:06,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:23:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:06,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:06,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:06,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879039955] [2023-08-30 07:23:06,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879039955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:06,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:06,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:23:06,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840191360] [2023-08-30 07:23:06,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:23:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:23:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:23:06,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 307 [2023-08-30 07:23:06,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:06,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:06,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 307 [2023-08-30 07:23:06,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:07,142 INFO L130 PetriNetUnfolder]: 1107/1821 cut-off events. [2023-08-30 07:23:07,142 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:23:07,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 1821 events. 1107/1821 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 10918 event pairs, 1041 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3684. Up to 1748 conditions per place. [2023-08-30 07:23:07,157 INFO L137 encePairwiseOnDemand]: 302/307 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-30 07:23:07,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 200 flow [2023-08-30 07:23:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:23:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:23:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-30 07:23:07,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43973941368078173 [2023-08-30 07:23:07,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-30 07:23:07,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-30 07:23:07,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:07,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-30 07:23:07,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,169 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 136 flow. Second operand 4 states and 540 transitions. [2023-08-30 07:23:07,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 200 flow [2023-08-30 07:23:07,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:07,172 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 137 flow [2023-08-30 07:23:07,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-30 07:23:07,174 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-30 07:23:07,174 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 137 flow [2023-08-30 07:23:07,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:07,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:23:07,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:07,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:07,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:07,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash 625389366, now seen corresponding path program 1 times [2023-08-30 07:23:07,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:07,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395631207] [2023-08-30 07:23:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:07,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:07,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:07,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:07,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:23:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:23:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:07,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:07,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:07,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395631207] [2023-08-30 07:23:07,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395631207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:07,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:07,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:07,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428328903] [2023-08-30 07:23:07,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:07,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 307 [2023-08-30 07:23:07,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:07,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 307 [2023-08-30 07:23:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:07,883 INFO L130 PetriNetUnfolder]: 1518/2490 cut-off events. [2023-08-30 07:23:07,883 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2023-08-30 07:23:07,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 2490 events. 1518/2490 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 14613 event pairs, 555 based on Foata normal form. 0/1419 useless extension candidates. Maximal degree in co-relation 4934. Up to 1567 conditions per place. [2023-08-30 07:23:07,894 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 52 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-30 07:23:07,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 287 flow [2023-08-30 07:23:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-30 07:23:07,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49077090119435396 [2023-08-30 07:23:07,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-30 07:23:07,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-30 07:23:07,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:07,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-30 07:23:07,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,906 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 137 flow. Second operand 3 states and 452 transitions. [2023-08-30 07:23:07,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 287 flow [2023-08-30 07:23:07,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:23:07,910 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 146 flow [2023-08-30 07:23:07,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-30 07:23:07,911 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 07:23:07,911 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 146 flow [2023-08-30 07:23:07,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:07,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:07,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:23:07,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:08,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:08,121 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:08,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2087603411, now seen corresponding path program 1 times [2023-08-30 07:23:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986813276] [2023-08-30 07:23:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:08,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:08,123 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:08,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:23:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:23:08,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:23:08,287 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 07:23:08,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 07:23:08,304 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 271 treesize of output 265 [2023-08-30 07:23:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:08,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:08,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986813276] [2023-08-30 07:23:08,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986813276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:08,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148518643] [2023-08-30 07:23:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:08,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 307 [2023-08-30 07:23:08,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:08,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:08,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 307 [2023-08-30 07:23:08,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:08,676 INFO L130 PetriNetUnfolder]: 1347/2181 cut-off events. [2023-08-30 07:23:08,676 INFO L131 PetriNetUnfolder]: For 256/256 co-relation queries the response was YES. [2023-08-30 07:23:08,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 2181 events. 1347/2181 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 12438 event pairs, 996 based on Foata normal form. 0/1596 useless extension candidates. Maximal degree in co-relation 4904. Up to 2070 conditions per place. [2023-08-30 07:23:08,684 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 33 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 07:23:08,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 37 transitions, 210 flow [2023-08-30 07:23:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-30 07:23:08,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46145494028230183 [2023-08-30 07:23:08,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-30 07:23:08,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-30 07:23:08,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:08,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-30 07:23:08,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:08,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:08,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:08,690 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 146 flow. Second operand 3 states and 425 transitions. [2023-08-30 07:23:08,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 37 transitions, 210 flow [2023-08-30 07:23:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:08,691 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 142 flow [2023-08-30 07:23:08,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-30 07:23:08,692 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-30 07:23:08,692 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 142 flow [2023-08-30 07:23:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:08,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:08,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:23:08,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:08,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:08,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:08,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:08,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2087603409, now seen corresponding path program 1 times [2023-08-30 07:23:08,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:08,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030793184] [2023-08-30 07:23:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:08,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:08,904 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:08,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:23:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:23:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:09,047 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:23:09,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:23:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:09,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:09,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030793184] [2023-08-30 07:23:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030793184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:09,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:23:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234397575] [2023-08-30 07:23:09,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:09,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:09,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 307 [2023-08-30 07:23:09,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:09,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:09,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 307 [2023-08-30 07:23:09,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:09,395 INFO L130 PetriNetUnfolder]: 1176/1902 cut-off events. [2023-08-30 07:23:09,395 INFO L131 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2023-08-30 07:23:09,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1902 events. 1176/1902 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 10567 event pairs, 873 based on Foata normal form. 0/1467 useless extension candidates. Maximal degree in co-relation 4244. Up to 1809 conditions per place. [2023-08-30 07:23:09,402 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 31 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 07:23:09,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 35 transitions, 202 flow [2023-08-30 07:23:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-30 07:23:09,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44625407166123776 [2023-08-30 07:23:09,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-30 07:23:09,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-30 07:23:09,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:09,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-30 07:23:09,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:09,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:09,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:09,408 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 142 flow. Second operand 3 states and 411 transitions. [2023-08-30 07:23:09,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 35 transitions, 202 flow [2023-08-30 07:23:09,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 35 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:09,413 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 139 flow [2023-08-30 07:23:09,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-30 07:23:09,415 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-30 07:23:09,415 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 139 flow [2023-08-30 07:23:09,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:09,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:09,415 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:23:09,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:09,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:09,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:09,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2090992704, now seen corresponding path program 2 times [2023-08-30 07:23:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:09,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499054465] [2023-08-30 07:23:09,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:23:09,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:09,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:09,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:09,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:23:09,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:23:09,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:23:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:23:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:09,815 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:23:09,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:23:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:09,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:23:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:10,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:10,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499054465] [2023-08-30 07:23:10,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499054465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:23:10,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:23:10,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:23:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185958091] [2023-08-30 07:23:10,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:23:10,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:23:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:23:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:23:12,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 307 [2023-08-30 07:23:12,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:12,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:12,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 307 [2023-08-30 07:23:12,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:16,101 INFO L130 PetriNetUnfolder]: 3912/6324 cut-off events. [2023-08-30 07:23:16,101 INFO L131 PetriNetUnfolder]: For 758/758 co-relation queries the response was YES. [2023-08-30 07:23:16,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14105 conditions, 6324 events. 3912/6324 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40929 event pairs, 2910 based on Foata normal form. 6/4961 useless extension candidates. Maximal degree in co-relation 14084. Up to 1401 conditions per place. [2023-08-30 07:23:16,131 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 232 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2023-08-30 07:23:16,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 247 transitions, 1241 flow [2023-08-30 07:23:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:23:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:23:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1764 transitions. [2023-08-30 07:23:16,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788273615635179 [2023-08-30 07:23:16,138 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1764 transitions. [2023-08-30 07:23:16,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1764 transitions. [2023-08-30 07:23:16,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:16,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1764 transitions. [2023-08-30 07:23:16,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:16,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:16,148 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:16,148 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 139 flow. Second operand 12 states and 1764 transitions. [2023-08-30 07:23:16,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 247 transitions, 1241 flow [2023-08-30 07:23:16,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 247 transitions, 1240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:16,152 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 237 flow [2023-08-30 07:23:16,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-08-30 07:23:16,153 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-08-30 07:23:16,153 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 237 flow [2023-08-30 07:23:16,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:16,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:16,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:16,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:16,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:16,364 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:16,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash -291197290, now seen corresponding path program 1 times [2023-08-30 07:23:16,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:16,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690971645] [2023-08-30 07:23:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:16,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:16,366 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:16,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:23:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 07:23:16,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:16,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:16,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690971645] [2023-08-30 07:23:16,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690971645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:16,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:16,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:23:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143345719] [2023-08-30 07:23:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:16,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:23:16,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:23:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:23:16,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 307 [2023-08-30 07:23:16,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:16,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:16,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 307 [2023-08-30 07:23:16,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:17,015 INFO L130 PetriNetUnfolder]: 3672/5904 cut-off events. [2023-08-30 07:23:17,016 INFO L131 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2023-08-30 07:23:17,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13304 conditions, 5904 events. 3672/5904 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38720 event pairs, 1930 based on Foata normal form. 0/4654 useless extension candidates. Maximal degree in co-relation 13275. Up to 4335 conditions per place. [2023-08-30 07:23:17,074 INFO L137 encePairwiseOnDemand]: 304/307 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-30 07:23:17,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 371 flow [2023-08-30 07:23:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:23:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:23:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-30 07:23:17,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831704668838219 [2023-08-30 07:23:17,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-30 07:23:17,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-30 07:23:17,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:17,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-30 07:23:17,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:17,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:17,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:17,080 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 237 flow. Second operand 3 states and 445 transitions. [2023-08-30 07:23:17,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 371 flow [2023-08-30 07:23:17,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 346 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:23:17,082 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 220 flow [2023-08-30 07:23:17,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2023-08-30 07:23:17,083 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2023-08-30 07:23:17,083 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 220 flow [2023-08-30 07:23:17,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:17,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:17,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:17,094 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 [2023-08-30 07:23:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:17,293 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:17,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash -291197293, now seen corresponding path program 1 times [2023-08-30 07:23:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738093862] [2023-08-30 07:23:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:17,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:17,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:23:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:23:17,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:17,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:17,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:17,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738093862] [2023-08-30 07:23:17,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738093862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:17,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:17,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:23:17,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279540744] [2023-08-30 07:23:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:17,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:23:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:23:17,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:23:17,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 307 [2023-08-30 07:23:17,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:17,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:17,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 307 [2023-08-30 07:23:17,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:18,069 INFO L130 PetriNetUnfolder]: 3366/5454 cut-off events. [2023-08-30 07:23:18,069 INFO L131 PetriNetUnfolder]: For 1649/1649 co-relation queries the response was YES. [2023-08-30 07:23:18,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12939 conditions, 5454 events. 3366/5454 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34762 event pairs, 2464 based on Foata normal form. 16/4533 useless extension candidates. Maximal degree in co-relation 12909. Up to 5054 conditions per place. [2023-08-30 07:23:18,088 INFO L137 encePairwiseOnDemand]: 302/307 looper letters, 53 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-30 07:23:18,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 380 flow [2023-08-30 07:23:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:23:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:23:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 573 transitions. [2023-08-30 07:23:18,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46661237785016285 [2023-08-30 07:23:18,089 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 573 transitions. [2023-08-30 07:23:18,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 573 transitions. [2023-08-30 07:23:18,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:18,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 573 transitions. [2023-08-30 07:23:18,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:18,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:18,093 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:18,094 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 220 flow. Second operand 4 states and 573 transitions. [2023-08-30 07:23:18,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 380 flow [2023-08-30 07:23:18,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:23:18,099 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 239 flow [2023-08-30 07:23:18,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2023-08-30 07:23:18,100 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2023-08-30 07:23:18,100 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 239 flow [2023-08-30 07:23:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:18,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:18,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:18,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:18,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:18,310 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:18,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash 705829867, now seen corresponding path program 1 times [2023-08-30 07:23:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:18,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623060402] [2023-08-30 07:23:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:18,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:18,312 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:18,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:23:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:23:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:18,472 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:23:18,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:23:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:18,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:23:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:19,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:19,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623060402] [2023-08-30 07:23:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623060402] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:23:19,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:23:19,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:23:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814912542] [2023-08-30 07:23:19,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:23:19,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:23:19,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:23:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:23:24,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 307 [2023-08-30 07:23:24,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:24,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:24,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 307 [2023-08-30 07:23:24,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:27,341 INFO L130 PetriNetUnfolder]: 2790/4590 cut-off events. [2023-08-30 07:23:27,342 INFO L131 PetriNetUnfolder]: For 1568/1568 co-relation queries the response was YES. [2023-08-30 07:23:27,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11165 conditions, 4590 events. 2790/4590 cut-off events. For 1568/1568 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28528 event pairs, 2050 based on Foata normal form. 172/4465 useless extension candidates. Maximal degree in co-relation 11133. Up to 3361 conditions per place. [2023-08-30 07:23:27,357 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 83 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2023-08-30 07:23:27,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 588 flow [2023-08-30 07:23:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:23:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:23:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1311 transitions. [2023-08-30 07:23:27,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270358306188925 [2023-08-30 07:23:27,362 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1311 transitions. [2023-08-30 07:23:27,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1311 transitions. [2023-08-30 07:23:27,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:27,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1311 transitions. [2023-08-30 07:23:27,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.1) internal successors, (1311), 10 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:27,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 307.0) internal successors, (3377), 11 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:27,370 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 307.0) internal successors, (3377), 11 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:27,370 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 239 flow. Second operand 10 states and 1311 transitions. [2023-08-30 07:23:27,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 588 flow [2023-08-30 07:23:27,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 578 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:23:27,375 INFO L231 Difference]: Finished difference. Result has 78 places, 44 transitions, 277 flow [2023-08-30 07:23:27,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=78, PETRI_TRANSITIONS=44} [2023-08-30 07:23:27,376 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-08-30 07:23:27,376 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 44 transitions, 277 flow [2023-08-30 07:23:27,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:27,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:27,376 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:27,386 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 (16)] Ended with exit code 0 [2023-08-30 07:23:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:27,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:27,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash 356598931, now seen corresponding path program 2 times [2023-08-30 07:23:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:27,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296878323] [2023-08-30 07:23:27,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:23:27,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:27,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:27,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:23:27,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:23:27,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:23:27,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:23:27,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:27,771 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:23:27,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:23:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:23:27,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:27,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296878323] [2023-08-30 07:23:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296878323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:27,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:27,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:23:27,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490875066] [2023-08-30 07:23:27,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:27,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:23:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:23:27,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:23:27,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 307 [2023-08-30 07:23:27,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 44 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:27,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:27,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 307 [2023-08-30 07:23:27,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:28,313 INFO L130 PetriNetUnfolder]: 1638/2916 cut-off events. [2023-08-30 07:23:28,313 INFO L131 PetriNetUnfolder]: For 3729/3729 co-relation queries the response was YES. [2023-08-30 07:23:28,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6877 conditions, 2916 events. 1638/2916 cut-off events. For 3729/3729 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17906 event pairs, 1222 based on Foata normal form. 504/3410 useless extension candidates. Maximal degree in co-relation 6843. Up to 2677 conditions per place. [2023-08-30 07:23:28,323 INFO L137 encePairwiseOnDemand]: 302/307 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-08-30 07:23:28,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 41 transitions, 329 flow [2023-08-30 07:23:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:23:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:23:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-30 07:23:28,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372964169381108 [2023-08-30 07:23:28,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-30 07:23:28,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-30 07:23:28,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:28,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-30 07:23:28,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:28,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:28,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:28,328 INFO L175 Difference]: Start difference. First operand has 78 places, 44 transitions, 277 flow. Second operand 4 states and 537 transitions. [2023-08-30 07:23:28,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 41 transitions, 329 flow [2023-08-30 07:23:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 41 transitions, 274 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-08-30 07:23:28,332 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 212 flow [2023-08-30 07:23:28,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-30 07:23:28,333 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2023-08-30 07:23:28,333 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 212 flow [2023-08-30 07:23:28,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:28,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:28,334 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:23:28,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:28,543 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:28,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash -792388928, now seen corresponding path program 3 times [2023-08-30 07:23:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190141917] [2023-08-30 07:23:28,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:23:28,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:28,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:28,545 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:28,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:23:28,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:23:28,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:23:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:23:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:28,851 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:23:28,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:23:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:29,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:23:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:31,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190141917] [2023-08-30 07:23:31,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190141917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:23:31,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:23:31,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:23:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913638190] [2023-08-30 07:23:31,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:23:31,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:23:31,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:23:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:23:41,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 307 [2023-08-30 07:23:41,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 212 flow. Second operand has 24 states, 24 states have (on average 128.0) internal successors, (3072), 24 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:41,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:41,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 307 [2023-08-30 07:23:41,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:57,064 INFO L130 PetriNetUnfolder]: 3738/6510 cut-off events. [2023-08-30 07:23:57,064 INFO L131 PetriNetUnfolder]: For 1901/1901 co-relation queries the response was YES. [2023-08-30 07:23:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15115 conditions, 6510 events. 3738/6510 cut-off events. For 1901/1901 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 41295 event pairs, 2770 based on Foata normal form. 12/6513 useless extension candidates. Maximal degree in co-relation 15088. Up to 1303 conditions per place. [2023-08-30 07:23:57,084 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 439 selfloop transitions, 24 changer transitions 0/466 dead transitions. [2023-08-30 07:23:57,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 466 transitions, 2503 flow [2023-08-30 07:23:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:23:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:23:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3502 transitions. [2023-08-30 07:23:57,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752985884907709 [2023-08-30 07:23:57,092 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3502 transitions. [2023-08-30 07:23:57,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3502 transitions. [2023-08-30 07:23:57,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:57,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3502 transitions. [2023-08-30 07:23:57,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 145.91666666666666) internal successors, (3502), 24 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:57,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:57,110 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:57,110 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 212 flow. Second operand 24 states and 3502 transitions. [2023-08-30 07:23:57,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 466 transitions, 2503 flow [2023-08-30 07:23:57,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 466 transitions, 2478 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:23:57,119 INFO L231 Difference]: Finished difference. Result has 100 places, 54 transitions, 391 flow [2023-08-30 07:23:57,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=391, PETRI_PLACES=100, PETRI_TRANSITIONS=54} [2023-08-30 07:23:57,120 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 48 predicate places. [2023-08-30 07:23:57,120 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 54 transitions, 391 flow [2023-08-30 07:23:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 128.0) internal successors, (3072), 24 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:57,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:57,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:57,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:57,337 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:57,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1496146348, now seen corresponding path program 1 times [2023-08-30 07:23:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164793791] [2023-08-30 07:23:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:23:57,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:57,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:57,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:23:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:23:57,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:23:57,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:57,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:57,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:57,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164793791] [2023-08-30 07:23:57,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164793791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:57,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:57,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:23:57,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93565794] [2023-08-30 07:23:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:23:57,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:23:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:23:57,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 307 [2023-08-30 07:23:57,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 54 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:57,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:57,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 307 [2023-08-30 07:23:57,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:58,167 INFO L130 PetriNetUnfolder]: 3608/6257 cut-off events. [2023-08-30 07:23:58,167 INFO L131 PetriNetUnfolder]: For 1744/1744 co-relation queries the response was YES. [2023-08-30 07:23:58,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15064 conditions, 6257 events. 3608/6257 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 39223 event pairs, 258 based on Foata normal form. 692/6907 useless extension candidates. Maximal degree in co-relation 15024. Up to 2595 conditions per place. [2023-08-30 07:23:58,191 INFO L137 encePairwiseOnDemand]: 302/307 looper letters, 73 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-08-30 07:23:58,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 79 transitions, 624 flow [2023-08-30 07:23:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:23:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:23:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 708 transitions. [2023-08-30 07:23:58,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46123778501628665 [2023-08-30 07:23:58,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 708 transitions. [2023-08-30 07:23:58,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 708 transitions. [2023-08-30 07:23:58,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:58,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 708 transitions. [2023-08-30 07:23:58,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:58,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:58,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:58,197 INFO L175 Difference]: Start difference. First operand has 100 places, 54 transitions, 391 flow. Second operand 5 states and 708 transitions. [2023-08-30 07:23:58,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 79 transitions, 624 flow [2023-08-30 07:23:58,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 79 transitions, 573 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-30 07:23:58,202 INFO L231 Difference]: Finished difference. Result has 96 places, 57 transitions, 371 flow [2023-08-30 07:23:58,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=96, PETRI_TRANSITIONS=57} [2023-08-30 07:23:58,203 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-30 07:23:58,203 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 57 transitions, 371 flow [2023-08-30 07:23:58,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:58,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:58,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:58,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 07:23:58,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:58,409 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:58,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -470602710, now seen corresponding path program 2 times [2023-08-30 07:23:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:58,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140458730] [2023-08-30 07:23:58,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:23:58,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:58,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:58,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:58,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:23:58,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:23:58,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:23:58,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:23:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:58,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:58,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140458730] [2023-08-30 07:23:58,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140458730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:58,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:23:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915494162] [2023-08-30 07:23:58,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:58,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:23:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:23:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:23:58,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 307 [2023-08-30 07:23:58,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 57 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:58,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:58,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 307 [2023-08-30 07:23:58,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:23:59,454 INFO L130 PetriNetUnfolder]: 3506/6582 cut-off events. [2023-08-30 07:23:59,455 INFO L131 PetriNetUnfolder]: For 4189/4517 co-relation queries the response was YES. [2023-08-30 07:23:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17689 conditions, 6582 events. 3506/6582 cut-off events. For 4189/4517 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 44193 event pairs, 448 based on Foata normal form. 980/7520 useless extension candidates. Maximal degree in co-relation 17645. Up to 3166 conditions per place. [2023-08-30 07:23:59,485 INFO L137 encePairwiseOnDemand]: 302/307 looper letters, 65 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2023-08-30 07:23:59,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 76 transitions, 581 flow [2023-08-30 07:23:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:23:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:23:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-08-30 07:23:59,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45667752442996745 [2023-08-30 07:23:59,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-08-30 07:23:59,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-08-30 07:23:59,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:23:59,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-08-30 07:23:59,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:59,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:59,491 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:59,491 INFO L175 Difference]: Start difference. First operand has 96 places, 57 transitions, 371 flow. Second operand 5 states and 701 transitions. [2023-08-30 07:23:59,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 76 transitions, 581 flow [2023-08-30 07:23:59,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 76 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:23:59,505 INFO L231 Difference]: Finished difference. Result has 102 places, 61 transitions, 413 flow [2023-08-30 07:23:59,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=102, PETRI_TRANSITIONS=61} [2023-08-30 07:23:59,505 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2023-08-30 07:23:59,505 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 61 transitions, 413 flow [2023-08-30 07:23:59,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:59,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:23:59,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:23:59,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:23:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:59,716 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:23:59,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:23:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash -5858628, now seen corresponding path program 3 times [2023-08-30 07:23:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:23:59,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400571740] [2023-08-30 07:23:59,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:23:59,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:23:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:23:59,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:23:59,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:23:59,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 07:23:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:23:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:23:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:23:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:23:59,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:23:59,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:23:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400571740] [2023-08-30 07:23:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400571740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:23:59,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:23:59,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:23:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998931118] [2023-08-30 07:23:59,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:23:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:23:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:23:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:23:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:23:59,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 307 [2023-08-30 07:23:59,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 61 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:59,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:59,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 307 [2023-08-30 07:23:59,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:24:00,830 INFO L130 PetriNetUnfolder]: 4414/7943 cut-off events. [2023-08-30 07:24:00,830 INFO L131 PetriNetUnfolder]: For 8376/8536 co-relation queries the response was YES. [2023-08-30 07:24:00,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24757 conditions, 7943 events. 4414/7943 cut-off events. For 8376/8536 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 53516 event pairs, 327 based on Foata normal form. 568/8431 useless extension candidates. Maximal degree in co-relation 24709. Up to 2641 conditions per place. [2023-08-30 07:24:00,859 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 69 selfloop transitions, 5 changer transitions 12/88 dead transitions. [2023-08-30 07:24:00,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 88 transitions, 695 flow [2023-08-30 07:24:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:24:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:24:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 838 transitions. [2023-08-30 07:24:00,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549402823018458 [2023-08-30 07:24:00,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 838 transitions. [2023-08-30 07:24:00,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 838 transitions. [2023-08-30 07:24:00,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:24:00,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 838 transitions. [2023-08-30 07:24:00,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.66666666666666) internal successors, (838), 6 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:00,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:00,865 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 307.0) internal successors, (2149), 7 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:00,865 INFO L175 Difference]: Start difference. First operand has 102 places, 61 transitions, 413 flow. Second operand 6 states and 838 transitions. [2023-08-30 07:24:00,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 88 transitions, 695 flow [2023-08-30 07:24:00,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 88 transitions, 691 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:24:00,882 INFO L231 Difference]: Finished difference. Result has 108 places, 56 transitions, 397 flow [2023-08-30 07:24:00,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=108, PETRI_TRANSITIONS=56} [2023-08-30 07:24:00,882 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 56 predicate places. [2023-08-30 07:24:00,882 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 56 transitions, 397 flow [2023-08-30 07:24:00,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:00,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:24:00,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:24:00,894 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 (21)] Ended with exit code 0 [2023-08-30 07:24:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:01,092 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:24:01,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:24:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1558231127, now seen corresponding path program 1 times [2023-08-30 07:24:01,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:24:01,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346864914] [2023-08-30 07:24:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:24:01,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:01,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:24:01,094 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:24:01,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:24:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:24:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:24:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:24:01,315 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 7 treesize of output 5 [2023-08-30 07:24:01,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 07:24:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:24:01,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:24:01,639 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 166 treesize of output 162 [2023-08-30 07:24:01,791 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:24:01,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 256 treesize of output 164 [2023-08-30 07:24:01,802 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 92 treesize of output 88 [2023-08-30 07:24:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:24:04,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:24:04,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346864914] [2023-08-30 07:24:04,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346864914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:24:04,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:24:04,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 07:24:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933515894] [2023-08-30 07:24:04,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:24:04,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:24:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:24:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:24:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:24:05,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 307 [2023-08-30 07:24:05,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 56 transitions, 397 flow. Second operand has 14 states, 14 states have (on average 118.64285714285714) internal successors, (1661), 14 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:05,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:24:05,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 307 [2023-08-30 07:24:05,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:24:07,129 INFO L130 PetriNetUnfolder]: 4543/8407 cut-off events. [2023-08-30 07:24:07,129 INFO L131 PetriNetUnfolder]: For 16949/17669 co-relation queries the response was YES. [2023-08-30 07:24:07,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28041 conditions, 8407 events. 4543/8407 cut-off events. For 16949/17669 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 58568 event pairs, 320 based on Foata normal form. 1040/9447 useless extension candidates. Maximal degree in co-relation 27990. Up to 2901 conditions per place. [2023-08-30 07:24:07,164 INFO L137 encePairwiseOnDemand]: 299/307 looper letters, 79 selfloop transitions, 11 changer transitions 9/102 dead transitions. [2023-08-30 07:24:07,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 102 transitions, 782 flow [2023-08-30 07:24:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:24:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:24:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1232 transitions. [2023-08-30 07:24:07,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013029315960912 [2023-08-30 07:24:07,167 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1232 transitions. [2023-08-30 07:24:07,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1232 transitions. [2023-08-30 07:24:07,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:24:07,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1232 transitions. [2023-08-30 07:24:07,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.2) internal successors, (1232), 10 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:07,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 307.0) internal successors, (3377), 11 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:07,170 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 307.0) internal successors, (3377), 11 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:07,170 INFO L175 Difference]: Start difference. First operand has 108 places, 56 transitions, 397 flow. Second operand 10 states and 1232 transitions. [2023-08-30 07:24:07,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 102 transitions, 782 flow [2023-08-30 07:24:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 745 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-30 07:24:07,189 INFO L231 Difference]: Finished difference. Result has 109 places, 61 transitions, 444 flow [2023-08-30 07:24:07,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=444, PETRI_PLACES=109, PETRI_TRANSITIONS=61} [2023-08-30 07:24:07,190 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2023-08-30 07:24:07,190 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 61 transitions, 444 flow [2023-08-30 07:24:07,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 118.64285714285714) internal successors, (1661), 14 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:07,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:24:07,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:24:07,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:24:07,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:07,401 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:24:07,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:24:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1057526569, now seen corresponding path program 2 times [2023-08-30 07:24:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:24:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103530877] [2023-08-30 07:24:07,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:24:07,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:24:07,402 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:24:07,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:24:07,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:24:07,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:24:07,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:24:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:24:07,576 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 186 treesize of output 178 [2023-08-30 07:24:07,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 07:24:07,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 07:24:07,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:24:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:24:07,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:24:08,140 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset (_ bv3 32) .cse6)) (.cse2 (bvadd c_~queue~0.offset (_ bv2 32) .cse6)) (.cse3 (bvadd c_~queue~0.offset .cse6 (_ bv1 32))) (.cse4 (bvadd c_~queue~0.offset .cse6))) (and (forall ((v_ArrVal_663 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_663) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))) c_~sum~0) (_ bv1 32))) (forall ((v_ArrVal_663 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (_ bv0 32) (bvadd (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_663) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4))) c_~sum~0)))))) is different from false [2023-08-30 07:24:08,176 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 166 treesize of output 162 [2023-08-30 07:24:08,331 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:24:08,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 352 treesize of output 260 [2023-08-30 07:24:08,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 92 [2023-08-30 07:24:08,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 65 [2023-08-30 07:24:08,369 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 92 treesize of output 88 [2023-08-30 07:24:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:24:13,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:24:13,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103530877] [2023-08-30 07:24:13,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103530877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:24:13,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:24:13,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-08-30 07:24:13,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784672323] [2023-08-30 07:24:13,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:24:13,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 07:24:13,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:24:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 07:24:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=226, Unknown=1, NotChecked=30, Total=306 [2023-08-30 07:24:13,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 307 [2023-08-30 07:24:13,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 61 transitions, 444 flow. Second operand has 18 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:13,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:24:13,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 307 [2023-08-30 07:24:13,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:24:16,897 INFO L130 PetriNetUnfolder]: 7443/12207 cut-off events. [2023-08-30 07:24:16,897 INFO L131 PetriNetUnfolder]: For 29329/29329 co-relation queries the response was YES. [2023-08-30 07:24:16,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47780 conditions, 12207 events. 7443/12207 cut-off events. For 29329/29329 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 74453 event pairs, 340 based on Foata normal form. 400/12607 useless extension candidates. Maximal degree in co-relation 47730. Up to 3881 conditions per place. [2023-08-30 07:24:16,965 INFO L137 encePairwiseOnDemand]: 295/307 looper letters, 104 selfloop transitions, 28 changer transitions 11/143 dead transitions. [2023-08-30 07:24:16,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1158 flow [2023-08-30 07:24:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:24:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:24:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1558 transitions. [2023-08-30 07:24:16,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31718241042345274 [2023-08-30 07:24:16,969 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1558 transitions. [2023-08-30 07:24:16,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1558 transitions. [2023-08-30 07:24:16,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:24:16,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1558 transitions. [2023-08-30 07:24:16,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.375) internal successors, (1558), 16 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:16,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 307.0) internal successors, (5219), 17 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:16,975 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 307.0) internal successors, (5219), 17 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:16,975 INFO L175 Difference]: Start difference. First operand has 109 places, 61 transitions, 444 flow. Second operand 16 states and 1558 transitions. [2023-08-30 07:24:16,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1158 flow [2023-08-30 07:24:17,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 143 transitions, 1111 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-30 07:24:17,157 INFO L231 Difference]: Finished difference. Result has 125 places, 80 transitions, 635 flow [2023-08-30 07:24:17,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=635, PETRI_PLACES=125, PETRI_TRANSITIONS=80} [2023-08-30 07:24:17,157 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 73 predicate places. [2023-08-30 07:24:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 80 transitions, 635 flow [2023-08-30 07:24:17,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:17,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:24:17,158 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 07:24:17,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:24:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:17,359 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:24:17,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:24:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1590270144, now seen corresponding path program 4 times [2023-08-30 07:24:17,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:24:17,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231935755] [2023-08-30 07:24:17,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:24:17,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:17,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:24:17,364 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:24:17,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:24:17,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:24:17,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:24:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 07:24:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:24:17,697 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:24:17,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:24:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:24:18,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:24:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:24:27,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:24:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231935755] [2023-08-30 07:24:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231935755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:24:27,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:24:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 07:24:27,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896062012] [2023-08-30 07:24:27,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:24:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 07:24:27,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:24:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 07:24:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 07:25:25,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 307 [2023-08-30 07:25:25,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 80 transitions, 635 flow. Second operand has 48 states, 48 states have (on average 128.0) internal successors, (6144), 48 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:25,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:25,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 307 [2023-08-30 07:25:25,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:42,358 WARN L222 SmtUtils]: Spent 10.78s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:25:52,450 WARN L222 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:04,864 WARN L222 SmtUtils]: Spent 10.85s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:14,765 WARN L222 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:21,972 WARN L222 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:29,143 WARN L222 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:42,764 WARN L222 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:27:27,967 INFO L130 PetriNetUnfolder]: 7924/15215 cut-off events. [2023-08-30 07:27:27,967 INFO L131 PetriNetUnfolder]: For 78275/79120 co-relation queries the response was YES. [2023-08-30 07:27:28,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73375 conditions, 15215 events. 7924/15215 cut-off events. For 78275/79120 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 108320 event pairs, 2744 based on Foata normal form. 775/15880 useless extension candidates. Maximal degree in co-relation 73319. Up to 5626 conditions per place. [2023-08-30 07:27:28,073 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 1667 selfloop transitions, 48 changer transitions 0/1728 dead transitions. [2023-08-30 07:27:28,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 1728 transitions, 16030 flow [2023-08-30 07:27:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 07:27:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 07:27:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7025 transitions. [2023-08-30 07:27:28,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767236699239957 [2023-08-30 07:27:28,080 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7025 transitions. [2023-08-30 07:27:28,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7025 transitions. [2023-08-30 07:27:28,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:28,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7025 transitions. [2023-08-30 07:27:28,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 146.35416666666666) internal successors, (7025), 48 states have internal predecessors, (7025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:28,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 307.0) internal successors, (15043), 49 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:28,103 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 307.0) internal successors, (15043), 49 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:28,104 INFO L175 Difference]: Start difference. First operand has 125 places, 80 transitions, 635 flow. Second operand 48 states and 7025 transitions. [2023-08-30 07:27:28,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 1728 transitions, 16030 flow [2023-08-30 07:27:28,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 1728 transitions, 15024 flow, removed 140 selfloop flow, removed 5 redundant places. [2023-08-30 07:27:28,928 INFO L231 Difference]: Finished difference. Result has 192 places, 105 transitions, 955 flow [2023-08-30 07:27:28,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=955, PETRI_PLACES=192, PETRI_TRANSITIONS=105} [2023-08-30 07:27:28,929 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 140 predicate places. [2023-08-30 07:27:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 105 transitions, 955 flow [2023-08-30 07:27:28,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 128.0) internal successors, (6144), 48 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:28,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:28,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:28,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:27:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:29,131 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:27:29,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 41020359, now seen corresponding path program 3 times [2023-08-30 07:27:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:29,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328289809] [2023-08-30 07:27:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:27:29,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:29,133 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:29,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:27:29,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:27:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:29,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:27:29,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:27:29,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:27:29,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328289809] [2023-08-30 07:27:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328289809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:29,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:29,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 07:27:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678797296] [2023-08-30 07:27:29,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:29,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:27:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:27:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:27:30,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-08-30 07:27:30,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 105 transitions, 955 flow. Second operand has 12 states, 12 states have (on average 128.83333333333334) internal successors, (1546), 12 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:30,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:30,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-08-30 07:27:30,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:33,234 INFO L130 PetriNetUnfolder]: 7884/15122 cut-off events. [2023-08-30 07:27:33,234 INFO L131 PetriNetUnfolder]: For 61470/62313 co-relation queries the response was YES. [2023-08-30 07:27:33,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68499 conditions, 15122 events. 7884/15122 cut-off events. For 61470/62313 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 107647 event pairs, 2697 based on Foata normal form. 693/15506 useless extension candidates. Maximal degree in co-relation 68417. Up to 11265 conditions per place. [2023-08-30 07:27:33,350 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 81 selfloop transitions, 10 changer transitions 32/136 dead transitions. [2023-08-30 07:27:33,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 136 transitions, 1399 flow [2023-08-30 07:27:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:27:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:27:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1308 transitions. [2023-08-30 07:27:33,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260586319218241 [2023-08-30 07:27:33,354 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1308 transitions. [2023-08-30 07:27:33,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1308 transitions. [2023-08-30 07:27:33,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:33,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1308 transitions. [2023-08-30 07:27:33,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.8) internal successors, (1308), 10 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:33,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 307.0) internal successors, (3377), 11 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:33,357 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 307.0) internal successors, (3377), 11 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:33,357 INFO L175 Difference]: Start difference. First operand has 192 places, 105 transitions, 955 flow. Second operand 10 states and 1308 transitions. [2023-08-30 07:27:33,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 136 transitions, 1399 flow [2023-08-30 07:27:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 136 transitions, 1303 flow, removed 25 selfloop flow, removed 22 redundant places. [2023-08-30 07:27:33,879 INFO L231 Difference]: Finished difference. Result has 183 places, 104 transitions, 897 flow [2023-08-30 07:27:33,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=897, PETRI_PLACES=183, PETRI_TRANSITIONS=104} [2023-08-30 07:27:33,879 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 131 predicate places. [2023-08-30 07:27:33,879 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 104 transitions, 897 flow [2023-08-30 07:27:33,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.83333333333334) internal successors, (1546), 12 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:33,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:33,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:33,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:27:34,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:34,089 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:27:34,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:34,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1134971857, now seen corresponding path program 4 times [2023-08-30 07:27:34,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:34,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762907688] [2023-08-30 07:27:34,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:27:34,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:34,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:34,091 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:34,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 07:27:34,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:27:34,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:27:34,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:34,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:27:34,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:27:34,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 9 [2023-08-30 07:27:34,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:27:34,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2023-08-30 07:27:34,616 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 7 treesize of output 5 [2023-08-30 07:27:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:27:34,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:35,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:27:35,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 188 [2023-08-30 07:27:35,071 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 188 treesize of output 184 [2023-08-30 07:27:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:27:40,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:40,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762907688] [2023-08-30 07:27:40,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762907688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:40,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:40,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-08-30 07:27:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990118011] [2023-08-30 07:27:40,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:40,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 07:27:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 07:27:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-08-30 07:27:49,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 307 [2023-08-30 07:27:49,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 104 transitions, 897 flow. Second operand has 15 states, 15 states have (on average 120.4) internal successors, (1806), 15 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:49,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:49,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 307 [2023-08-30 07:27:49,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:53,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:27:55,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:27:57,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:27:59,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:28:05,497 INFO L130 PetriNetUnfolder]: 15497/30560 cut-off events. [2023-08-30 07:28:05,497 INFO L131 PetriNetUnfolder]: For 175415/177549 co-relation queries the response was YES. [2023-08-30 07:28:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148905 conditions, 30560 events. 15497/30560 cut-off events. For 175415/177549 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 259574 event pairs, 2588 based on Foata normal form. 2527/31999 useless extension candidates. Maximal degree in co-relation 148818. Up to 11191 conditions per place. [2023-08-30 07:28:05,865 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 153 selfloop transitions, 38 changer transitions 0/204 dead transitions. [2023-08-30 07:28:05,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 204 transitions, 1965 flow [2023-08-30 07:28:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:28:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:28:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1637 transitions. [2023-08-30 07:28:05,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41017288900025056 [2023-08-30 07:28:05,869 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1637 transitions. [2023-08-30 07:28:05,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1637 transitions. [2023-08-30 07:28:05,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:05,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1637 transitions. [2023-08-30 07:28:05,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.92307692307692) internal successors, (1637), 13 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:05,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 307.0) internal successors, (4298), 14 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:05,873 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 307.0) internal successors, (4298), 14 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:05,873 INFO L175 Difference]: Start difference. First operand has 183 places, 104 transitions, 897 flow. Second operand 13 states and 1637 transitions. [2023-08-30 07:28:05,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 204 transitions, 1965 flow [2023-08-30 07:28:07,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 204 transitions, 1868 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-08-30 07:28:07,248 INFO L231 Difference]: Finished difference. Result has 184 places, 134 transitions, 1226 flow [2023-08-30 07:28:07,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1226, PETRI_PLACES=184, PETRI_TRANSITIONS=134} [2023-08-30 07:28:07,249 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2023-08-30 07:28:07,249 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 134 transitions, 1226 flow [2023-08-30 07:28:07,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.4) internal successors, (1806), 15 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:07,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:07,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:28:07,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 07:28:07,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:07,451 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:28:07,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1541942452, now seen corresponding path program 5 times [2023-08-30 07:28:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:07,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645260705] [2023-08-30 07:28:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:28:07,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:07,454 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:28:07,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 07:28:07,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:28:07,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:28:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 07:28:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:08,810 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 13 [2023-08-30 07:28:08,851 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 7 treesize of output 5 [2023-08-30 07:28:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:28:09,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:28:13,534 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-08-30 07:28:13,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 674 treesize of output 530 [2023-08-30 07:28:13,568 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 285 treesize of output 277 [2023-08-30 07:28:13,603 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 277 treesize of output 269 [2023-08-30 07:29:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:29:55,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:29:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645260705] [2023-08-30 07:29:55,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645260705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:29:55,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:29:55,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2023-08-30 07:29:55,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504744124] [2023-08-30 07:29:55,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:29:55,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:29:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:29:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:29:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:30:11,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 307 [2023-08-30 07:30:11,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 134 transitions, 1226 flow. Second operand has 23 states, 23 states have (on average 97.95652173913044) internal successors, (2253), 23 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:11,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:11,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 307 [2023-08-30 07:30:11,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:27,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:36,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:44,687 INFO L130 PetriNetUnfolder]: 20401/38648 cut-off events. [2023-08-30 07:30:44,687 INFO L131 PetriNetUnfolder]: For 191254/192346 co-relation queries the response was YES. [2023-08-30 07:30:45,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191657 conditions, 38648 events. 20401/38648 cut-off events. For 191254/192346 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 317992 event pairs, 2121 based on Foata normal form. 946/39362 useless extension candidates. Maximal degree in co-relation 191573. Up to 12736 conditions per place. [2023-08-30 07:30:45,222 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 209 selfloop transitions, 106 changer transitions 59/382 dead transitions. [2023-08-30 07:30:45,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 382 transitions, 3968 flow [2023-08-30 07:30:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 07:30:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 07:30:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3567 transitions. [2023-08-30 07:30:45,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3319683573755235 [2023-08-30 07:30:45,228 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3567 transitions. [2023-08-30 07:30:45,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3567 transitions. [2023-08-30 07:30:45,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:45,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3567 transitions. [2023-08-30 07:30:45,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 101.91428571428571) internal successors, (3567), 35 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:45,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:45,241 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:45,241 INFO L175 Difference]: Start difference. First operand has 184 places, 134 transitions, 1226 flow. Second operand 35 states and 3567 transitions. [2023-08-30 07:30:45,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 382 transitions, 3968 flow [2023-08-30 07:30:46,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 382 transitions, 3725 flow, removed 118 selfloop flow, removed 3 redundant places. [2023-08-30 07:30:46,457 INFO L231 Difference]: Finished difference. Result has 229 places, 194 transitions, 2061 flow [2023-08-30 07:30:46,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2061, PETRI_PLACES=229, PETRI_TRANSITIONS=194} [2023-08-30 07:30:46,458 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 177 predicate places. [2023-08-30 07:30:46,458 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 194 transitions, 2061 flow [2023-08-30 07:30:46,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.95652173913044) internal successors, (2253), 23 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:46,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:46,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:30:46,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:46,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:46,660 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 07:30:46,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash -401510254, now seen corresponding path program 6 times [2023-08-30 07:30:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:46,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841051515] [2023-08-30 07:30:46,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:30:46,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:46,662 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:46,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 07:30:46,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 07:30:46,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:30:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:30:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:47,370 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 7 treesize of output 5 [2023-08-30 07:30:47,402 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 21 treesize of output 17 [2023-08-30 07:30:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:30:47,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:30:54,942 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-08-30 07:30:54,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 674 treesize of output 530 [2023-08-30 07:30:54,966 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 285 treesize of output 277 [2023-08-30 07:30:54,989 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 277 treesize of output 269 [2023-08-30 07:34:35,802 WARN L222 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 3025 DAG size of output: 3026 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15