./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-min-max-inc-dec.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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:01:57,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:01:57,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:01:57,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:01:57,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:01:57,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:01:57,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:01:57,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:01:57,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:01:57,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:01:57,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:01:57,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:01:57,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:01:57,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:01:57,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:01:57,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:01:57,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:01:57,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:01:57,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:01:57,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:01:57,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:01:57,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:01:57,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:01:57,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:01:57,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:01:57,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:01:57,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:01:57,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:01:57,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:01:57,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:01:57,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:01:57,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:01:57,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:01:57,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:01:57,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:01:57,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:01:57,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:01:57,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:01:57,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:01:57,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:01:57,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:01:57,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:01:57,687 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:01:57,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:01:57,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:01:57,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:01:57,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:01:57,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:01:57,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:01:57,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:01:57,690 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:01:57,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:01:57,691 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:01:57,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:01:57,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:01:57,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:01:57,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:01:57,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:01:57,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:01:57,693 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:01:57,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:01:57,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:01:57,693 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:01:57,693 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:01:57,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:01:57,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:01:57,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:01:57,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:01:57,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:01:57,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:01:57,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:01:57,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:01:57,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:01:57,695 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:01:57,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:01:57,696 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:01:57,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:01:58,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:01:58,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:01:58,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:01:58,048 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:01:58,048 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:01:58,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-09-01 03:01:59,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:01:59,565 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:01:59,566 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-09-01 03:01:59,574 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e9d3431/cb40611b0c96457ca7c0ee582891e92b/FLAGde337c893 [2023-09-01 03:01:59,585 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3e9d3431/cb40611b0c96457ca7c0ee582891e92b [2023-09-01 03:01:59,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:01:59,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:01:59,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:01:59,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:01:59,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:01:59,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:01:59" (1/1) ... [2023-09-01 03:01:59,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc9bf46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:59, skipping insertion in model container [2023-09-01 03:01:59,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:01:59" (1/1) ... [2023-09-01 03:01:59,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:01:59,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:01:59,852 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-min-max-inc-dec.wvr.c[3271,3284] [2023-09-01 03:01:59,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:01:59,885 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) [2023-09-01 03:01:59,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f51fec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:01:59, skipping insertion in model container [2023-09-01 03:01:59,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:01:59,888 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:01:59,890 INFO L158 Benchmark]: Toolchain (without parser) took 299.63ms. Allocated memory is still 62.9MB. Free memory was 41.0MB in the beginning and 30.9MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:01:59,890 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 52.4MB. Free memory was 30.4MB in the beginning and 30.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:01:59,891 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.52ms. Allocated memory is still 62.9MB. Free memory was 40.8MB in the beginning and 30.9MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:01:59,893 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 52.4MB. Free memory was 30.4MB in the beginning and 30.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 297.52ms. Allocated memory is still 62.9MB. Free memory was 40.8MB in the beginning and 30.9MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 143]: 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-min-max-inc-dec.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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:02:01,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:02:01,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:02:02,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:02:02,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:02:02,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:02:02,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:02:02,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:02:02,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:02:02,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:02:02,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:02:02,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:02:02,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:02:02,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:02:02,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:02:02,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:02:02,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:02:02,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:02:02,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:02:02,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:02:02,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:02:02,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:02:02,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:02:02,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:02:02,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:02:02,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:02:02,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:02:02,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:02:02,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:02:02,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:02:02,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:02:02,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:02:02,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:02:02,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:02:02,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:02:02,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:02:02,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:02:02,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:02:02,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:02:02,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:02:02,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:02:02,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:02:02,121 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:02:02,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:02:02,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:02:02,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:02:02,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:02:02,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:02:02,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:02:02,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:02:02,124 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:02:02,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:02:02,124 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:02:02,124 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:02:02,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:02:02,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:02:02,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:02:02,125 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:02:02,125 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:02:02,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:02:02,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:02:02,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:02:02,126 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:02:02,126 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:02:02,126 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:02:02,127 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:02:02,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:02:02,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:02:02,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:02:02,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:02:02,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:02:02,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:02:02,128 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:02:02,128 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:02:02,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:02:02,129 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:02:02,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:02:02,129 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:02:02,129 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:02:02,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:02:02,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:02:02,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:02:02,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:02:02,503 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:02:02,503 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:02:02,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-09-01 03:02:03,742 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:02:03,979 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:02:03,981 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-09-01 03:02:03,991 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26cfb334/371f7b41c7d04cf28039be81eda662e2/FLAG1e33a6e64 [2023-09-01 03:02:04,007 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26cfb334/371f7b41c7d04cf28039be81eda662e2 [2023-09-01 03:02:04,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:02:04,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:02:04,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:02:04,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:02:04,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:02:04,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b37f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04, skipping insertion in model container [2023-09-01 03:02:04,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:02:04,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:02:04,187 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-min-max-inc-dec.wvr.c[3271,3284] [2023-09-01 03:02:04,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:02:04,205 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:02:04,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:02:04,226 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-min-max-inc-dec.wvr.c[3271,3284] [2023-09-01 03:02:04,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:02:04,234 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:02:04,261 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-min-max-inc-dec.wvr.c[3271,3284] [2023-09-01 03:02:04,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:02:04,282 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:02:04,283 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:02:04,290 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:02:04,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04 WrapperNode [2023-09-01 03:02:04,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:02:04,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:02:04,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:02:04,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:02:04,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,355 INFO L138 Inliner]: procedures = 29, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2023-09-01 03:02:04,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:02:04,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:02:04,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:02:04,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:02:04,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,409 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:02:04,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:02:04,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:02:04,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:02:04,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (1/1) ... [2023-09-01 03:02:04,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:02:04,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:02:04,458 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) [2023-09-01 03:02:04,478 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 [2023-09-01 03:02:04,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:02:04,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:02:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:02:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:02:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:02:04,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:02:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:02:04,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:02:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:02:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:02:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:02:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:02:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 03:02:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 03:02:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:02:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:02:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:02:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:02:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:02:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:02:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:02:04,510 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:02:04,689 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:02:04,691 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:02:05,262 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:02:05,430 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:02:05,430 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 03:02:05,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:02:05 BoogieIcfgContainer [2023-09-01 03:02:05,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:02:05,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:02:05,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:02:05,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:02:05,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:02:04" (1/3) ... [2023-09-01 03:02:05,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c59468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:02:05, skipping insertion in model container [2023-09-01 03:02:05,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:02:04" (2/3) ... [2023-09-01 03:02:05,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c59468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:02:05, skipping insertion in model container [2023-09-01 03:02:05,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:02:05" (3/3) ... [2023-09-01 03:02:05,445 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2023-09-01 03:02:05,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:02:05,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-09-01 03:02:05,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:02:05,608 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 03:02:05,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 233 transitions, 506 flow [2023-09-01 03:02:05,761 INFO L130 PetriNetUnfolder]: 14/228 cut-off events. [2023-09-01 03:02:05,762 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 03:02:05,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 228 events. 14/228 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 355 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2023-09-01 03:02:05,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 233 transitions, 506 flow [2023-09-01 03:02:05,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 224 transitions, 478 flow [2023-09-01 03:02:05,794 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:02:05,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 224 transitions, 478 flow [2023-09-01 03:02:05,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 224 transitions, 478 flow [2023-09-01 03:02:05,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 224 transitions, 478 flow [2023-09-01 03:02:05,863 INFO L130 PetriNetUnfolder]: 14/224 cut-off events. [2023-09-01 03:02:05,864 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 03:02:05,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 224 events. 14/224 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 357 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2023-09-01 03:02:05,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 8466 [2023-09-01 03:02:32,741 INFO L134 LiptonReduction]: Checked pairs total: 13254 [2023-09-01 03:02:32,742 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-09-01 03:02:32,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:02:32,812 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;@2794a3fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:02:32,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-09-01 03:02:32,815 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:02:32,815 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:02:32,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:32,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:02:32,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:02:32,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash 31246, now seen corresponding path program 1 times [2023-09-01 03:02:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:32,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805101689] [2023-09-01 03:02:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:02:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:32,844 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) [2023-09-01 03:02:32,846 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 [2023-09-01 03:02:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:02:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:33,278 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2023-09-01 03:02:33,279 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 5 case distinctions, treesize of input 21 treesize of output 93 [2023-09-01 03:02:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:33,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:33,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805101689] [2023-09-01 03:02:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805101689] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:33,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:33,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:02:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124867907] [2023-09-01 03:02:33,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:02:33,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:02:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:02:33,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-09-01 03:02:33,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:33,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:33,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-09-01 03:02:33,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:40,364 INFO L130 PetriNetUnfolder]: 65876/79025 cut-off events. [2023-09-01 03:02:40,365 INFO L131 PetriNetUnfolder]: For 614/614 co-relation queries the response was YES. [2023-09-01 03:02:40,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160498 conditions, 79025 events. 65876/79025 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375001 event pairs, 42198 based on Foata normal form. 0/30999 useless extension candidates. Maximal degree in co-relation 144276. Up to 78857 conditions per place. [2023-09-01 03:02:40,938 INFO L137 encePairwiseOnDemand]: 435/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 03:02:40,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 302 flow [2023-09-01 03:02:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:02:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:02:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-09-01 03:02:40,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47185185185185186 [2023-09-01 03:02:40,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-09-01 03:02:40,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-09-01 03:02:40,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:40,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-09-01 03:02:40,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:40,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:40,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:40,985 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 200 flow. Second operand 3 states and 637 transitions. [2023-09-01 03:02:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 302 flow [2023-09-01 03:02:41,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-09-01 03:02:41,229 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 154 flow [2023-09-01 03:02:41,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-09-01 03:02:41,233 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -22 predicate places. [2023-09-01 03:02:41,234 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 154 flow [2023-09-01 03:02:41,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:41,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:41,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:02:41,247 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 [2023-09-01 03:02:41,443 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 [2023-09-01 03:02:41,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:02:41,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash 31317, now seen corresponding path program 1 times [2023-09-01 03:02:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:41,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986356588] [2023-09-01 03:02:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:41,446 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 [2023-09-01 03:02:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:41,447 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) [2023-09-01 03:02:41,449 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 [2023-09-01 03:02:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:02:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:41,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:41,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986356588] [2023-09-01 03:02:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986356588] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:41,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:41,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:02:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767329963] [2023-09-01 03:02:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:02:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:02:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:02:41,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 450 [2023-09-01 03:02:41,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:41,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:41,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 450 [2023-09-01 03:02:41,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:46,429 INFO L130 PetriNetUnfolder]: 65876/79027 cut-off events. [2023-09-01 03:02:46,429 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:02:46,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159013 conditions, 79027 events. 65876/79027 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 374980 event pairs, 42198 based on Foata normal form. 0/31000 useless extension candidates. Maximal degree in co-relation 159007. Up to 78858 conditions per place. [2023-09-01 03:02:46,943 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-09-01 03:02:46,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 292 flow [2023-09-01 03:02:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:02:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:02:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-09-01 03:02:46,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762962962962963 [2023-09-01 03:02:46,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-09-01 03:02:46,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-09-01 03:02:46,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:46,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-09-01 03:02:46,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:46,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:46,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:46,954 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 154 flow. Second operand 3 states and 643 transitions. [2023-09-01 03:02:46,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 292 flow [2023-09-01 03:02:46,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:02:46,958 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 169 flow [2023-09-01 03:02:46,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2023-09-01 03:02:46,959 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-09-01 03:02:46,962 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 169 flow [2023-09-01 03:02:46,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:46,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:46,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:02:46,980 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 [2023-09-01 03:02:47,180 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 [2023-09-01 03:02:47,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:02:47,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash 31247, now seen corresponding path program 1 times [2023-09-01 03:02:47,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:47,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823397396] [2023-09-01 03:02:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:47,182 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 [2023-09-01 03:02:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:47,183 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) [2023-09-01 03:02:47,185 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 [2023-09-01 03:02:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:02:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:47,533 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-09-01 03:02:47,534 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-09-01 03:02:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:47,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:47,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823397396] [2023-09-01 03:02:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823397396] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:47,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:02:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663983787] [2023-09-01 03:02:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:47,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:02:47,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:02:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:02:47,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-09-01 03:02:47,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:47,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:47,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-09-01 03:02:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:52,876 INFO L130 PetriNetUnfolder]: 65876/79026 cut-off events. [2023-09-01 03:02:52,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:02:52,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159019 conditions, 79026 events. 65876/79026 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375061 event pairs, 42198 based on Foata normal form. 1/31002 useless extension candidates. Maximal degree in co-relation 159011. Up to 78858 conditions per place. [2023-09-01 03:02:53,316 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-09-01 03:02:53,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 301 flow [2023-09-01 03:02:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:02:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:02:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-09-01 03:02:53,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-09-01 03:02:53,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-09-01 03:02:53,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-09-01 03:02:53,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:53,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-09-01 03:02:53,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:53,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:53,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:53,325 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 169 flow. Second operand 3 states and 625 transitions. [2023-09-01 03:02:53,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 301 flow [2023-09-01 03:02:53,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 297 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:02:53,328 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 173 flow [2023-09-01 03:02:53,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-09-01 03:02:53,329 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2023-09-01 03:02:53,329 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 173 flow [2023-09-01 03:02:53,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:53,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:53,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:02:53,343 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 [2023-09-01 03:02:53,539 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 [2023-09-01 03:02:53,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:02:53,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 971020, now seen corresponding path program 1 times [2023-09-01 03:02:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:53,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013461998] [2023-09-01 03:02:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:53,541 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 [2023-09-01 03:02:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:53,542 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) [2023-09-01 03:02:53,542 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 [2023-09-01 03:02:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 03:02:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:53,849 INFO L321 Elim1Store]: treesize reduction 350, result has 9.3 percent of original size [2023-09-01 03:02:53,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 95 [2023-09-01 03:02:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:02:54,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:02:54,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:02:54,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013461998] [2023-09-01 03:02:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013461998] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:02:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:02:54,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:02:54,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548530789] [2023-09-01 03:02:54,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:02:54,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:02:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:02:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:02:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:02:54,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-09-01 03:02:54,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:54,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:54,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-09-01 03:02:54,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:59,377 INFO L130 PetriNetUnfolder]: 55616/66965 cut-off events. [2023-09-01 03:02:59,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:02:59,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134899 conditions, 66965 events. 55616/66965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3193. Compared 315478 event pairs, 35418 based on Foata normal form. 0/26861 useless extension candidates. Maximal degree in co-relation 134889. Up to 66797 conditions per place. [2023-09-01 03:02:59,758 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 63 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-09-01 03:02:59,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 295 flow [2023-09-01 03:02:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:02:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:02:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-09-01 03:02:59,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614814814814815 [2023-09-01 03:02:59,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-09-01 03:02:59,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-09-01 03:02:59,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:02:59,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-09-01 03:02:59,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:59,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:59,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:59,769 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 173 flow. Second operand 3 states and 623 transitions. [2023-09-01 03:02:59,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 295 flow [2023-09-01 03:02:59,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:02:59,774 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 165 flow [2023-09-01 03:02:59,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-09-01 03:02:59,776 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-09-01 03:02:59,776 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 165 flow [2023-09-01 03:02:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:59,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:59,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:02:59,789 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 [2023-09-01 03:02:59,988 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 [2023-09-01 03:02:59,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:02:59,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 971019, now seen corresponding path program 1 times [2023-09-01 03:02:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:02:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896917389] [2023-09-01 03:02:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:59,990 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 [2023-09-01 03:02:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:02:59,991 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) [2023-09-01 03:02:59,993 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 [2023-09-01 03:03:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 03:03:00,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:00,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:00,427 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2023-09-01 03:03:00,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-09-01 03:03:00,470 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 03:03:00,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-09-01 03:03:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:00,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:00,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896917389] [2023-09-01 03:03:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896917389] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:00,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:03:00,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760675652] [2023-09-01 03:03:00,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:00,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:03:00,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:03:00,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:03:01,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-09-01 03:03:01,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:01,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:01,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-09-01 03:03:01,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:10,132 INFO L130 PetriNetUnfolder]: 100542/121441 cut-off events. [2023-09-01 03:03:10,132 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:03:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244778 conditions, 121441 events. 100542/121441 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5440. Compared 610210 event pairs, 63888 based on Foata normal form. 0/49548 useless extension candidates. Maximal degree in co-relation 244768. Up to 66328 conditions per place. [2023-09-01 03:03:10,750 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 121 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2023-09-01 03:03:10,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 585 flow [2023-09-01 03:03:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:03:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:03:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1373 transitions. [2023-09-01 03:03:10,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43587301587301586 [2023-09-01 03:03:10,754 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1373 transitions. [2023-09-01 03:03:10,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1373 transitions. [2023-09-01 03:03:10,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:10,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1373 transitions. [2023-09-01 03:03:10,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:10,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:10,765 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:10,765 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 165 flow. Second operand 7 states and 1373 transitions. [2023-09-01 03:03:10,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 585 flow [2023-09-01 03:03:10,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 136 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:10,769 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 227 flow [2023-09-01 03:03:10,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-09-01 03:03:10,770 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-09-01 03:03:10,770 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 227 flow [2023-09-01 03:03:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:10,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:10,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:03:10,783 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 (6)] Ended with exit code 0 [2023-09-01 03:03:10,981 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 [2023-09-01 03:03:10,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:03:10,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash 970950, now seen corresponding path program 1 times [2023-09-01 03:03:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619192779] [2023-09-01 03:03:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:10,982 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 [2023-09-01 03:03:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:10,984 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) [2023-09-01 03:03:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:03:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:03:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:11,282 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-09-01 03:03:11,283 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-09-01 03:03:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:11,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:11,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619192779] [2023-09-01 03:03:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619192779] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:11,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:03:11,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109888669] [2023-09-01 03:03:11,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:03:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:03:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:03:12,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 450 [2023-09-01 03:03:12,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:12,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:12,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 450 [2023-09-01 03:03:12,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:20,801 INFO L130 PetriNetUnfolder]: 100541/121438 cut-off events. [2023-09-01 03:03:20,801 INFO L131 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2023-09-01 03:03:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246592 conditions, 121438 events. 100541/121438 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 5254. Compared 608539 event pairs, 63888 based on Foata normal form. 3/51351 useless extension candidates. Maximal degree in co-relation 246578. Up to 66328 conditions per place. [2023-09-01 03:03:21,658 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 119 selfloop transitions, 8 changer transitions 0/133 dead transitions. [2023-09-01 03:03:21,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 607 flow [2023-09-01 03:03:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:03:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:03:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-09-01 03:03:21,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45037037037037037 [2023-09-01 03:03:21,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-09-01 03:03:21,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-09-01 03:03:21,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:21,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-09-01 03:03:21,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:21,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:21,670 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:21,670 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 227 flow. Second operand 6 states and 1216 transitions. [2023-09-01 03:03:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 607 flow [2023-09-01 03:03:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 591 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 03:03:21,674 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 221 flow [2023-09-01 03:03:21,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2023-09-01 03:03:21,675 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2023-09-01 03:03:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 221 flow [2023-09-01 03:03:21,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:21,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:21,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:03:21,693 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 [2023-09-01 03:03:21,889 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 [2023-09-01 03:03:21,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:03:21,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:21,889 INFO L85 PathProgramCache]: Analyzing trace with hash 933171617, now seen corresponding path program 1 times [2023-09-01 03:03:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:21,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986073579] [2023-09-01 03:03:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:21,890 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 [2023-09-01 03:03:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:21,891 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) [2023-09-01 03:03:21,892 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 [2023-09-01 03:03:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 03:03:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:22,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:22,263 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2023-09-01 03:03:22,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2023-09-01 03:03:22,325 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 03:03:22,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2023-09-01 03:03:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:22,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:23,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:23,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986073579] [2023-09-01 03:03:23,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986073579] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:23,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:23,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:03:23,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945605081] [2023-09-01 03:03:23,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:23,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:03:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:03:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:03:23,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-09-01 03:03:23,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 221 flow. Second operand has 8 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:23,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:23,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-09-01 03:03:23,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:31,919 INFO L130 PetriNetUnfolder]: 97709/117994 cut-off events. [2023-09-01 03:03:31,919 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-09-01 03:03:32,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239704 conditions, 117994 events. 97709/117994 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5226. Compared 589881 event pairs, 62118 based on Foata normal form. 0/50263 useless extension candidates. Maximal degree in co-relation 239690. Up to 64610 conditions per place. [2023-09-01 03:03:32,728 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 120 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-09-01 03:03:32,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 591 flow [2023-09-01 03:03:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:03:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:03:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1008 transitions. [2023-09-01 03:03:32,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448 [2023-09-01 03:03:32,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1008 transitions. [2023-09-01 03:03:32,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1008 transitions. [2023-09-01 03:03:32,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:32,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1008 transitions. [2023-09-01 03:03:32,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:32,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:32,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:32,740 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 221 flow. Second operand 5 states and 1008 transitions. [2023-09-01 03:03:32,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 591 flow [2023-09-01 03:03:32,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 572 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 03:03:32,744 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 204 flow [2023-09-01 03:03:32,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-09-01 03:03:32,746 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-09-01 03:03:32,746 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 204 flow [2023-09-01 03:03:32,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:32,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:32,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:03:32,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:03:32,957 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 [2023-09-01 03:03:32,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:03:32,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash 933171616, now seen corresponding path program 1 times [2023-09-01 03:03:32,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:32,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542276500] [2023-09-01 03:03:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:32,958 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 [2023-09-01 03:03:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:32,961 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) [2023-09-01 03:03:32,962 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 [2023-09-01 03:03:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:03:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:33,216 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2023-09-01 03:03:33,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2023-09-01 03:03:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:33,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:33,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542276500] [2023-09-01 03:03:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542276500] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:33,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:33,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691308728] [2023-09-01 03:03:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:33,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:33,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-09-01 03:03:33,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:33,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:33,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-09-01 03:03:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:41,286 INFO L130 PetriNetUnfolder]: 95309/114982 cut-off events. [2023-09-01 03:03:41,287 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-09-01 03:03:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233709 conditions, 114982 events. 95309/114982 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5346. Compared 575476 event pairs, 60516 based on Foata normal form. 0/49212 useless extension candidates. Maximal degree in co-relation 233695. Up to 114646 conditions per place. [2023-09-01 03:03:41,884 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 03:03:41,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 330 flow [2023-09-01 03:03:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-09-01 03:03:41,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585185185185185 [2023-09-01 03:03:41,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-09-01 03:03:41,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-09-01 03:03:41,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:41,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-09-01 03:03:41,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:41,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:41,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:41,891 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 204 flow. Second operand 3 states and 619 transitions. [2023-09-01 03:03:41,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 330 flow [2023-09-01 03:03:41,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 71 transitions, 325 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:03:41,893 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2023-09-01 03:03:41,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-09-01 03:03:41,894 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -15 predicate places. [2023-09-01 03:03:41,894 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2023-09-01 03:03:41,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:41,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:41,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:03:41,904 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 [2023-09-01 03:03:42,103 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 [2023-09-01 03:03:42,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:03:42,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 933171359, now seen corresponding path program 1 times [2023-09-01 03:03:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179216373] [2023-09-01 03:03:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:42,105 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 [2023-09-01 03:03:42,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:42,106 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) [2023-09-01 03:03:42,108 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 [2023-09-01 03:03:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:03:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:42,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:42,292 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 25 treesize of output 21 [2023-09-01 03:03:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:42,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:42,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179216373] [2023-09-01 03:03:42,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179216373] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:42,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:42,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:03:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63645754] [2023-09-01 03:03:42,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:42,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:03:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:03:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:03:43,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 450 [2023-09-01 03:03:43,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 181.25) internal successors, (1450), 8 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:43,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:43,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 450 [2023-09-01 03:03:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:51,161 INFO L130 PetriNetUnfolder]: 94877/114544 cut-off events. [2023-09-01 03:03:51,162 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-09-01 03:03:51,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232802 conditions, 114544 events. 94877/114544 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5198. Compared 571440 event pairs, 60348 based on Foata normal form. 0/49176 useless extension candidates. Maximal degree in co-relation 232788. Up to 62883 conditions per place. [2023-09-01 03:03:51,813 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 111 selfloop transitions, 8 changer transitions 0/123 dead transitions. [2023-09-01 03:03:51,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 555 flow [2023-09-01 03:03:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:03:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:03:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1379 transitions. [2023-09-01 03:03:51,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2023-09-01 03:03:51,817 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1379 transitions. [2023-09-01 03:03:51,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1379 transitions. [2023-09-01 03:03:51,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:51,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1379 transitions. [2023-09-01 03:03:51,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,825 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,825 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 1379 transitions. [2023-09-01 03:03:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 555 flow [2023-09-01 03:03:51,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:51,827 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 216 flow [2023-09-01 03:03:51,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-09-01 03:03:51,829 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-09-01 03:03:51,829 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 216 flow [2023-09-01 03:03:51,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.25) internal successors, (1450), 8 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:51,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:03:51,838 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 [2023-09-01 03:03:52,033 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 [2023-09-01 03:03:52,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:03:52,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash 933171358, now seen corresponding path program 1 times [2023-09-01 03:03:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:52,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774403463] [2023-09-01 03:03:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:52,034 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 [2023-09-01 03:03:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:52,035 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) [2023-09-01 03:03:52,039 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 [2023-09-01 03:03:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:03:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:52,267 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2023-09-01 03:03:52,267 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 5 case distinctions, treesize of input 21 treesize of output 93 [2023-09-01 03:03:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:52,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:52,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774403463] [2023-09-01 03:03:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774403463] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:52,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:52,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:03:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683155122] [2023-09-01 03:03:52,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:52,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:03:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:03:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:03:52,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 450 [2023-09-01 03:03:52,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:52,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:52,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 450 [2023-09-01 03:03:52,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:55,943 INFO L130 PetriNetUnfolder]: 42107/51316 cut-off events. [2023-09-01 03:03:55,943 INFO L131 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2023-09-01 03:03:56,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104356 conditions, 51316 events. 42107/51316 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 241748 event pairs, 26336 based on Foata normal form. 0/26029 useless extension candidates. Maximal degree in co-relation 104341. Up to 51129 conditions per place. [2023-09-01 03:03:56,261 INFO L137 encePairwiseOnDemand]: 441/450 looper letters, 56 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-09-01 03:03:56,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 64 transitions, 328 flow [2023-09-01 03:03:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:03:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:03:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-09-01 03:03:56,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42944444444444446 [2023-09-01 03:03:56,272 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-09-01 03:03:56,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-09-01 03:03:56,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:56,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-09-01 03:03:56,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:56,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:56,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:56,292 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 216 flow. Second operand 4 states and 773 transitions. [2023-09-01 03:03:56,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 64 transitions, 328 flow [2023-09-01 03:03:56,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 313 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 03:03:56,303 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 201 flow [2023-09-01 03:03:56,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-09-01 03:03:56,304 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2023-09-01 03:03:56,304 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 201 flow [2023-09-01 03:03:56,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:56,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:56,305 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:03:56,316 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 [2023-09-01 03:03:56,516 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 [2023-09-01 03:03:56,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:03:56,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:56,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1136922673, now seen corresponding path program 2 times [2023-09-01 03:03:56,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:56,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121735833] [2023-09-01 03:03:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:03:56,517 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 [2023-09-01 03:03:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:56,518 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) [2023-09-01 03:03:56,519 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 [2023-09-01 03:03:56,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:03:56,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:03:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:03:56,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:56,834 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-09-01 03:03:56,835 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-09-01 03:03:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:56,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:57,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:57,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121735833] [2023-09-01 03:03:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121735833] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:57,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:57,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:03:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628125596] [2023-09-01 03:03:57,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:03:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:03:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:04:00,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 450 [2023-09-01 03:04:00,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 201 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:00,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:00,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 450 [2023-09-01 03:04:00,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:22,480 INFO L130 PetriNetUnfolder]: 202871/247098 cut-off events. [2023-09-01 03:04:22,480 INFO L131 PetriNetUnfolder]: For 3224/3224 co-relation queries the response was YES. [2023-09-01 03:04:23,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504460 conditions, 247098 events. 202871/247098 cut-off events. For 3224/3224 co-relation queries the response was YES. Maximal size of possible extension queue 8121. Compared 1326161 event pairs, 127672 based on Foata normal form. 6/127270 useless extension candidates. Maximal degree in co-relation 504445. Up to 27892 conditions per place. [2023-09-01 03:04:24,030 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 466 selfloop transitions, 13 changer transitions 0/481 dead transitions. [2023-09-01 03:04:24,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 481 transitions, 2183 flow [2023-09-01 03:04:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:04:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:04:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2669 transitions. [2023-09-01 03:04:24,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49425925925925923 [2023-09-01 03:04:24,037 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2669 transitions. [2023-09-01 03:04:24,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2669 transitions. [2023-09-01 03:04:24,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:24,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2669 transitions. [2023-09-01 03:04:24,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 222.41666666666666) internal successors, (2669), 12 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:24,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:24,062 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:24,062 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 201 flow. Second operand 12 states and 2669 transitions. [2023-09-01 03:04:24,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 481 transitions, 2183 flow [2023-09-01 03:04:24,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 481 transitions, 2164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:04:24,071 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 296 flow [2023-09-01 03:04:24,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=296, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2023-09-01 03:04:24,072 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2023-09-01 03:04:24,072 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 296 flow [2023-09-01 03:04:24,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:24,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:24,073 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:04:24,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-09-01 03:04:24,283 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 [2023-09-01 03:04:24,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:04:24,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1136922604, now seen corresponding path program 2 times [2023-09-01 03:04:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512227648] [2023-09-01 03:04:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:04:24,285 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 [2023-09-01 03:04:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:24,286 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) [2023-09-01 03:04:24,286 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 [2023-09-01 03:04:24,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:04:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:04:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:04:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:24,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:24,662 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2023-09-01 03:04:24,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-09-01 03:04:24,693 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 03:04:24,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-09-01 03:04:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:04:24,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:04:24,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512227648] [2023-09-01 03:04:24,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512227648] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:04:24,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:04:24,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:04:24,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372196950] [2023-09-01 03:04:24,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:04:24,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:04:24,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:04:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:04:24,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 450 [2023-09-01 03:04:24,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:24,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:24,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 450 [2023-09-01 03:04:24,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:41,722 INFO L130 PetriNetUnfolder]: 169670/207491 cut-off events. [2023-09-01 03:04:41,722 INFO L131 PetriNetUnfolder]: For 3234/3234 co-relation queries the response was YES. [2023-09-01 03:04:42,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419056 conditions, 207491 events. 169670/207491 cut-off events. For 3234/3234 co-relation queries the response was YES. Maximal size of possible extension queue 6993. Compared 1121498 event pairs, 105552 based on Foata normal form. 6400/110184 useless extension candidates. Maximal degree in co-relation 419034. Up to 206681 conditions per place. [2023-09-01 03:04:43,230 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 66 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-09-01 03:04:43,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 69 transitions, 404 flow [2023-09-01 03:04:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:04:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:04:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-09-01 03:04:43,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46074074074074073 [2023-09-01 03:04:43,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-09-01 03:04:43,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-09-01 03:04:43,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:43,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-09-01 03:04:43,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:43,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:43,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:43,235 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 296 flow. Second operand 3 states and 622 transitions. [2023-09-01 03:04:43,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 69 transitions, 404 flow [2023-09-01 03:04:43,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 69 transitions, 391 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 03:04:43,238 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 259 flow [2023-09-01 03:04:43,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2023-09-01 03:04:43,239 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2023-09-01 03:04:43,239 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 259 flow [2023-09-01 03:04:43,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:43,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:43,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:43,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 03:04:43,449 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 [2023-09-01 03:04:43,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:04:43,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash -870216760, now seen corresponding path program 1 times [2023-09-01 03:04:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:43,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446064431] [2023-09-01 03:04:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:43,450 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 [2023-09-01 03:04:43,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:43,451 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) [2023-09-01 03:04:43,452 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 [2023-09-01 03:04:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:43,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:04:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:43,702 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2023-09-01 03:04:43,702 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 8 case distinctions, treesize of input 60 treesize of output 81 [2023-09-01 03:04:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:43,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:04:43,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:43,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446064431] [2023-09-01 03:04:43,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446064431] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:04:43,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:04:43,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:04:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275187429] [2023-09-01 03:04:43,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:04:43,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:04:43,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:04:43,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:04:44,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-09-01 03:04:44,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:44,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:44,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-09-01 03:04:44,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:02,508 INFO L130 PetriNetUnfolder]: 168212/205520 cut-off events. [2023-09-01 03:05:02,509 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-09-01 03:05:03,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415102 conditions, 205520 events. 168212/205520 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6993. Compared 1108294 event pairs, 104616 based on Foata normal form. 0/103082 useless extension candidates. Maximal degree in co-relation 415080. Up to 204710 conditions per place. [2023-09-01 03:05:04,438 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-09-01 03:05:04,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 67 transitions, 385 flow [2023-09-01 03:05:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:05:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:05:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-09-01 03:05:04,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525925925925926 [2023-09-01 03:05:04,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-09-01 03:05:04,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-09-01 03:05:04,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:04,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-09-01 03:05:04,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:04,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:04,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:04,443 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 259 flow. Second operand 3 states and 611 transitions. [2023-09-01 03:05:04,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 67 transitions, 385 flow [2023-09-01 03:05:04,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:05:04,446 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 256 flow [2023-09-01 03:05:04,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2023-09-01 03:05:04,447 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2023-09-01 03:05:04,447 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 256 flow [2023-09-01 03:05:04,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:04,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:04,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:04,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:05:04,657 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 [2023-09-01 03:05:04,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:05:04,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash -870216761, now seen corresponding path program 1 times [2023-09-01 03:05:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264469625] [2023-09-01 03:05:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:04,660 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 [2023-09-01 03:05:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:04,670 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) [2023-09-01 03:05:04,680 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 [2023-09-01 03:05:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:05:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:04,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:04,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:04,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:05:05,016 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2023-09-01 03:05:05,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-09-01 03:05:05,040 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:05:05,041 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 39 treesize of output 35 [2023-09-01 03:05:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:05,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:05:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:05,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264469625] [2023-09-01 03:05:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264469625] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:05:05,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:05:05,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:05:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242561498] [2023-09-01 03:05:05,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:05:05,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:05:05,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:05:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:05:06,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-09-01 03:05:06,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 178.75) internal successors, (1430), 8 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:06,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:06,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-09-01 03:05:06,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:23,458 INFO L130 PetriNetUnfolder]: 164754/201549 cut-off events. [2023-09-01 03:05:23,458 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-09-01 03:05:24,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406961 conditions, 201549 events. 164754/201549 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6991. Compared 1087348 event pairs, 102760 based on Foata normal form. 0/102180 useless extension candidates. Maximal degree in co-relation 406938. Up to 178012 conditions per place. [2023-09-01 03:05:24,977 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 105 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-09-01 03:05:24,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 568 flow [2023-09-01 03:05:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:05:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:05:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 986 transitions. [2023-09-01 03:05:24,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43822222222222224 [2023-09-01 03:05:24,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 986 transitions. [2023-09-01 03:05:24,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 986 transitions. [2023-09-01 03:05:24,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:24,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 986 transitions. [2023-09-01 03:05:24,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:24,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:24,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:24,983 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 256 flow. Second operand 5 states and 986 transitions. [2023-09-01 03:05:24,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 568 flow [2023-09-01 03:05:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 567 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:05:24,986 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 257 flow [2023-09-01 03:05:24,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2023-09-01 03:05:24,987 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2023-09-01 03:05:24,987 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 257 flow [2023-09-01 03:05:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.75) internal successors, (1430), 8 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:24,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:24,995 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 (15)] Ended with exit code 0 [2023-09-01 03:05:25,188 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 [2023-09-01 03:05:25,189 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:05:25,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash -870463380, now seen corresponding path program 1 times [2023-09-01 03:05:25,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:25,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697724606] [2023-09-01 03:05:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:25,190 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 [2023-09-01 03:05:25,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:25,191 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) [2023-09-01 03:05:25,192 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 [2023-09-01 03:05:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:25,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:05:25,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:25,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:05:25,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:25,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697724606] [2023-09-01 03:05:25,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697724606] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:05:25,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:05:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:05:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000189221] [2023-09-01 03:05:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:05:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:05:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:05:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:05:25,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 450 [2023-09-01 03:05:25,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 186.16666666666666) internal successors, (1117), 6 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:25,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:25,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 450 [2023-09-01 03:05:25,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:49,890 INFO L130 PetriNetUnfolder]: 253973/308462 cut-off events. [2023-09-01 03:05:49,891 INFO L131 PetriNetUnfolder]: For 1420/1420 co-relation queries the response was YES. [2023-09-01 03:05:50,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623762 conditions, 308462 events. 253973/308462 cut-off events. For 1420/1420 co-relation queries the response was YES. Maximal size of possible extension queue 10121. Compared 1649114 event pairs, 66393 based on Foata normal form. 0/154157 useless extension candidates. Maximal degree in co-relation 623738. Up to 211032 conditions per place. [2023-09-01 03:05:52,030 INFO L137 encePairwiseOnDemand]: 442/450 looper letters, 119 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-09-01 03:05:52,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 648 flow [2023-09-01 03:05:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:05:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:05:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2023-09-01 03:05:52,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613333333333333 [2023-09-01 03:05:52,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2023-09-01 03:05:52,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2023-09-01 03:05:52,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:52,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2023-09-01 03:05:52,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:52,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:52,037 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:52,037 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 257 flow. Second operand 5 states and 1038 transitions. [2023-09-01 03:05:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 648 flow [2023-09-01 03:05:52,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 128 transitions, 643 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:05:52,039 INFO L231 Difference]: Finished difference. Result has 91 places, 70 transitions, 295 flow [2023-09-01 03:05:52,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=70} [2023-09-01 03:05:52,040 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -5 predicate places. [2023-09-01 03:05:52,040 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 70 transitions, 295 flow [2023-09-01 03:05:52,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 186.16666666666666) internal successors, (1117), 6 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:52,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:52,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:52,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:05:52,241 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 [2023-09-01 03:05:52,241 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:05:52,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1214556723, now seen corresponding path program 1 times [2023-09-01 03:05:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:52,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072268766] [2023-09-01 03:05:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:52,243 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 [2023-09-01 03:05:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:52,245 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) [2023-09-01 03:05:52,248 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 [2023-09-01 03:05:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:05:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:52,720 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-09-01 03:05:52,721 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-09-01 03:05:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:52,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:05:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:53,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072268766] [2023-09-01 03:05:53,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072268766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:05:53,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:05:53,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:05:53,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570824291] [2023-09-01 03:05:53,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:05:53,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:05:53,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:05:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:05:55,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-09-01 03:05:55,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 70 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 178.6) internal successors, (1786), 10 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:55,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:55,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-09-01 03:05:55,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:06:37,937 INFO L130 PetriNetUnfolder]: 357428/431681 cut-off events. [2023-09-01 03:06:37,937 INFO L131 PetriNetUnfolder]: For 108988/108988 co-relation queries the response was YES. [2023-09-01 03:06:40,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016766 conditions, 431681 events. 357428/431681 cut-off events. For 108988/108988 co-relation queries the response was YES. Maximal size of possible extension queue 13248. Compared 2439919 event pairs, 63540 based on Foata normal form. 6588/317444 useless extension candidates. Maximal degree in co-relation 1016740. Up to 150850 conditions per place. [2023-09-01 03:06:42,070 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 175 selfloop transitions, 13 changer transitions 0/190 dead transitions. [2023-09-01 03:06:42,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 190 transitions, 962 flow [2023-09-01 03:06:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:06:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:06:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1590 transitions. [2023-09-01 03:06:42,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-09-01 03:06:42,074 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1590 transitions. [2023-09-01 03:06:42,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1590 transitions. [2023-09-01 03:06:42,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:06:42,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1590 transitions. [2023-09-01 03:06:42,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.75) internal successors, (1590), 8 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:42,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 450.0) internal successors, (4050), 9 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:42,080 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 450.0) internal successors, (4050), 9 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:42,080 INFO L175 Difference]: Start difference. First operand has 91 places, 70 transitions, 295 flow. Second operand 8 states and 1590 transitions. [2023-09-01 03:06:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 190 transitions, 962 flow [2023-09-01 03:06:42,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 190 transitions, 953 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:06:42,147 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 361 flow [2023-09-01 03:06:42,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2023-09-01 03:06:42,148 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 5 predicate places. [2023-09-01 03:06:42,148 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 361 flow [2023-09-01 03:06:42,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.6) internal successors, (1786), 10 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:42,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:06:42,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:06:42,163 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 [2023-09-01 03:06:42,363 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 [2023-09-01 03:06:42,363 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:06:42,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:06:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1240337822, now seen corresponding path program 1 times [2023-09-01 03:06:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:06:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405785052] [2023-09-01 03:06:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:06:42,365 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 [2023-09-01 03:06:42,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:06:42,366 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) [2023-09-01 03:06:42,366 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 [2023-09-01 03:06:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:06:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:06:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:06:42,633 INFO L321 Elim1Store]: treesize reduction 290, result has 11.0 percent of original size [2023-09-01 03:06:42,633 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 6 case distinctions, treesize of input 43 treesize of output 62 [2023-09-01 03:06:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:06:43,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:06:43,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:06:43,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405785052] [2023-09-01 03:06:43,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405785052] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:06:43,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:06:43,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:06:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382141404] [2023-09-01 03:06:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:06:43,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:06:43,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:06:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:06:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:06:43,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-09-01 03:06:43,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:43,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:06:43,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-09-01 03:06:43,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:07:22,548 INFO L130 PetriNetUnfolder]: 345674/417965 cut-off events. [2023-09-01 03:07:22,549 INFO L131 PetriNetUnfolder]: For 415497/415497 co-relation queries the response was YES. [2023-09-01 03:07:24,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121074 conditions, 417965 events. 345674/417965 cut-off events. For 415497/415497 co-relation queries the response was YES. Maximal size of possible extension queue 13023. Compared 2301102 event pairs, 206685 based on Foata normal form. 0/309173 useless extension candidates. Maximal degree in co-relation 1121042. Up to 416804 conditions per place. [2023-09-01 03:07:26,384 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 70 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-09-01 03:07:26,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 73 transitions, 499 flow [2023-09-01 03:07:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:07:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:07:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-09-01 03:07:26,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44962962962962966 [2023-09-01 03:07:26,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-09-01 03:07:26,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-09-01 03:07:26,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:07:26,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-09-01 03:07:26,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:26,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:26,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:26,390 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 361 flow. Second operand 3 states and 607 transitions. [2023-09-01 03:07:26,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 73 transitions, 499 flow [2023-09-01 03:07:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 73 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 03:07:26,831 INFO L231 Difference]: Finished difference. Result has 98 places, 73 transitions, 342 flow [2023-09-01 03:07:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=98, PETRI_TRANSITIONS=73} [2023-09-01 03:07:26,832 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2023-09-01 03:07:26,832 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 73 transitions, 342 flow [2023-09-01 03:07:26,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:26,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:07:26,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:07:26,842 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 (18)] Ended with exit code 0 [2023-09-01 03:07:27,039 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 [2023-09-01 03:07:27,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:07:27,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:07:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1240337821, now seen corresponding path program 1 times [2023-09-01 03:07:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:07:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328838718] [2023-09-01 03:07:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:07:27,041 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 [2023-09-01 03:07:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:07:27,042 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) [2023-09-01 03:07:27,043 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 [2023-09-01 03:07:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:07:27,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:07:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:07:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:07:27,398 INFO L321 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2023-09-01 03:07:27,398 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 5 case distinctions, treesize of input 23 treesize of output 80 [2023-09-01 03:07:27,416 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 246 treesize of output 242 [2023-09-01 03:07:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:27,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:07:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:27,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:07:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328838718] [2023-09-01 03:07:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328838718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:07:27,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:07:27,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:07:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020204178] [2023-09-01 03:07:27,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:07:27,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:07:27,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:07:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:07:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:07:28,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-09-01 03:07:28,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 73 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 179.25) internal successors, (1434), 8 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:28,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:07:28,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-09-01 03:07:28,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:08:08,249 INFO L130 PetriNetUnfolder]: 338641/408970 cut-off events. [2023-09-01 03:08:08,250 INFO L131 PetriNetUnfolder]: For 335952/335952 co-relation queries the response was YES. [2023-09-01 03:08:10,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065643 conditions, 408970 events. 338641/408970 cut-off events. For 335952/335952 co-relation queries the response was YES. Maximal size of possible extension queue 12581. Compared 2235714 event pairs, 202238 based on Foata normal form. 0/304121 useless extension candidates. Maximal degree in co-relation 1065611. Up to 362468 conditions per place. [2023-09-01 03:08:12,291 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 117 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2023-09-01 03:08:12,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 122 transitions, 750 flow [2023-09-01 03:08:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:08:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:08:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 978 transitions. [2023-09-01 03:08:12,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43466666666666665 [2023-09-01 03:08:12,294 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 978 transitions. [2023-09-01 03:08:12,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 978 transitions. [2023-09-01 03:08:12,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:08:12,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 978 transitions. [2023-09-01 03:08:12,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:12,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:12,297 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:12,297 INFO L175 Difference]: Start difference. First operand has 98 places, 73 transitions, 342 flow. Second operand 5 states and 978 transitions. [2023-09-01 03:08:12,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 122 transitions, 750 flow [2023-09-01 03:08:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 122 transitions, 749 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:08:12,804 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 343 flow [2023-09-01 03:08:12,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=99, PETRI_TRANSITIONS=71} [2023-09-01 03:08:12,805 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 3 predicate places. [2023-09-01 03:08:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 343 flow [2023-09-01 03:08:12,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.25) internal successors, (1434), 8 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:12,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:08:12,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:08:12,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:08:13,006 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 [2023-09-01 03:08:13,006 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-09-01 03:08:13,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:08:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1240100951, now seen corresponding path program 1 times [2023-09-01 03:08:13,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:08:13,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437939966] [2023-09-01 03:08:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:08:13,008 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 [2023-09-01 03:08:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:08:13,009 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) [2023-09-01 03:08:13,013 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 [2023-09-01 03:08:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:08:13,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:08:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:08:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:08:13,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:08:13,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:08:13,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437939966] [2023-09-01 03:08:13,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437939966] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:08:13,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:08:13,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:08:13,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21571598] [2023-09-01 03:08:13,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:08:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:08:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:08:13,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:08:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:08:13,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 450 [2023-09-01 03:08:13,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 71 transitions, 343 flow. Second operand has 6 states, 6 states have (on average 186.5) internal successors, (1119), 6 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:13,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:08:13,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 450 [2023-09-01 03:08:13,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand