./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.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/chl-name-comparator-trans.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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --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 01:39:36,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:39:36,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:39:37,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:39:37,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:39:37,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:39:37,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:39:37,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:39:37,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:39:37,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:39:37,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:39:37,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:39:37,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:39:37,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:39:37,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:39:37,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:39:37,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:39:37,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:39:37,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:39:37,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:39:37,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:39:37,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:39:37,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:39:37,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:39:37,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:39:37,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:39:37,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:39:37,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:39:37,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:39:37,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:39:37,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:39:37,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:39:37,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:39:37,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:39:37,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:39:37,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:39:37,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:39:37,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:39:37,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:39:37,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:39:37,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:39:37,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:39:37,099 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:39:37,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:39:37,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:39:37,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:39:37,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:39:37,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:39:37,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:39:37,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:39:37,103 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:39:37,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:39:37,104 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:39:37,104 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:39:37,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:39:37,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:39:37,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:39:37,104 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:39:37,105 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:39:37,105 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:39:37,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:39:37,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:39:37,105 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:39:37,106 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:39:37,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:39:37,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:39:37,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:39:37,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:39:37,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:39:37,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:39:37,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:39:37,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:39:37,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:39:37,108 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:39:37,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:39:37,108 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:39:37,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:39:37,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:39:37,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:39:37,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:39:37,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:39:37,416 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:39:37,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-09-01 01:39:38,642 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:39:38,862 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:39:38,863 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-09-01 01:39:38,870 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c587daf56/9b91800d5f5e4d50b9fd9db9c17b3741/FLAGc6a306b2c [2023-09-01 01:39:38,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c587daf56/9b91800d5f5e4d50b9fd9db9c17b3741 [2023-09-01 01:39:38,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:39:38,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:39:38,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:39:38,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:39:38,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:39:38,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:39:38" (1/1) ... [2023-09-01 01:39:38,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2118e5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:38, skipping insertion in model container [2023-09-01 01:39:38,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:39:38" (1/1) ... [2023-09-01 01:39:38,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:39:38,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:39:39,063 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-09-01 01:39:39,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:39:39,082 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 01:39:39,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a9251b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:39, skipping insertion in model container [2023-09-01 01:39:39,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:39:39,083 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:39:39,085 INFO L158 Benchmark]: Toolchain (without parser) took 198.72ms. Allocated memory is still 77.6MB. Free memory was 56.5MB in the beginning and 45.9MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:39:39,085 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory was 38.7MB in the beginning and 38.6MB in the end (delta: 49.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:39:39,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.65ms. Allocated memory is still 77.6MB. Free memory was 56.2MB in the beginning and 45.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:39:39,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory was 38.7MB in the beginning and 38.6MB in the end (delta: 49.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.65ms. Allocated memory is still 77.6MB. Free memory was 56.2MB in the beginning and 45.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --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 01:39:40,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:39:40,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:39:40,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:39:40,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:39:40,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:39:40,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:39:40,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:39:40,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:39:40,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:39:40,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:39:40,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:39:40,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:39:40,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:39:40,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:39:40,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:39:40,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:39:40,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:39:40,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:39:40,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:39:40,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:39:40,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:39:40,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:39:40,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:39:40,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:39:40,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:39:40,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:39:40,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:39:40,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:39:40,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:39:40,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:39:40,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:39:40,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:39:40,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:39:40,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:39:40,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:39:40,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:39:40,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:39:40,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:39:40,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:39:40,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:39:40,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:39:40,896 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:39:40,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:39:40,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:39:40,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:39:40,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:39:40,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:39:40,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:39:40,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:39:40,900 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:39:40,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:39:40,901 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:39:40,901 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:39:40,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:39:40,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:39:40,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:39:40,902 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:39:40,902 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:39:40,902 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:39:40,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:39:40,902 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:39:40,903 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:39:40,903 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:39:40,903 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:39:40,903 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:39:40,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:39:40,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:39:40,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:39:40,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:39:40,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:39:40,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:39:40,905 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:39:40,905 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:39:40,905 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:39:40,905 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:39:40,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:39:40,906 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:39:40,906 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:39:40,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:39:41,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:39:41,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:39:41,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:39:41,250 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:39:41,250 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:39:41,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-09-01 01:39:42,505 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:39:42,761 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:39:42,762 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-09-01 01:39:42,768 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd5f6c9e/6361460d3ed0472283e2115f71a81854/FLAG66d8aaf73 [2023-09-01 01:39:42,784 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd5f6c9e/6361460d3ed0472283e2115f71a81854 [2023-09-01 01:39:42,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:39:42,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:39:42,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:39:42,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:39:42,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:39:42,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:39:42" (1/1) ... [2023-09-01 01:39:42,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a91d54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:42, skipping insertion in model container [2023-09-01 01:39:42,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:39:42" (1/1) ... [2023-09-01 01:39:42,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:39:42,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:39:42,990 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-09-01 01:39:43,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:39:43,038 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:39:43,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:39:43,089 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-09-01 01:39:43,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:39:43,104 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:39:43,131 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-09-01 01:39:43,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:39:43,161 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:39:43,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43 WrapperNode [2023-09-01 01:39:43,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:39:43,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:39:43,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:39:43,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:39:43,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,235 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 297 [2023-09-01 01:39:43,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:39:43,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:39:43,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:39:43,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:39:43,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,281 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:39:43,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:39:43,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:39:43,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:39:43,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (1/1) ... [2023-09-01 01:39:43,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:39:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:39:43,382 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 01:39:43,406 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 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:39:43,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:39:43,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:39:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:39:43,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:39:43,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:39:43,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:39:43,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:39:43,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:39:43,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:39:43,433 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 01:39:43,542 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:39:43,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:39:44,181 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:39:44,193 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:39:44,194 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:39:44,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:39:44 BoogieIcfgContainer [2023-09-01 01:39:44,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:39:44,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:39:44,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:39:44,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:39:44,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:39:42" (1/3) ... [2023-09-01 01:39:44,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcabf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:39:44, skipping insertion in model container [2023-09-01 01:39:44,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:39:43" (2/3) ... [2023-09-01 01:39:44,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcabf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:39:44, skipping insertion in model container [2023-09-01 01:39:44,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:39:44" (3/3) ... [2023-09-01 01:39:44,204 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-09-01 01:39:44,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:39:44,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-09-01 01:39:44,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:39:44,357 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:39:44,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 365 transitions, 754 flow [2023-09-01 01:39:44,584 INFO L130 PetriNetUnfolder]: 26/362 cut-off events. [2023-09-01 01:39:44,584 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:39:44,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 362 events. 26/362 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 927 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 263. Up to 2 conditions per place. [2023-09-01 01:39:44,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 365 transitions, 754 flow [2023-09-01 01:39:44,608 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 358 transitions, 734 flow [2023-09-01 01:39:44,612 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:39:44,640 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 358 transitions, 734 flow [2023-09-01 01:39:44,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 358 transitions, 734 flow [2023-09-01 01:39:44,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 358 transitions, 734 flow [2023-09-01 01:39:44,706 INFO L130 PetriNetUnfolder]: 26/358 cut-off events. [2023-09-01 01:39:44,706 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:39:44,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 358 events. 26/358 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 263. Up to 2 conditions per place. [2023-09-01 01:39:44,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 31488 [2023-09-01 01:40:05,061 INFO L134 LiptonReduction]: Checked pairs total: 27812 [2023-09-01 01:40:05,061 INFO L136 LiptonReduction]: Total number of compositions: 416 [2023-09-01 01:40:05,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:40:05,088 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;@d0d5bbe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:40:05,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-09-01 01:40:05,091 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:40:05,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:40:05,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:05,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:40:05,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:05,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 47277, now seen corresponding path program 1 times [2023-09-01 01:40:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:05,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683726058] [2023-09-01 01:40:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:05,108 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 01:40:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:05,111 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 01:40:05,147 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 01:40:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:40:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:05,367 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:05,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:05,399 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 01:40:05,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:05,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683726058] [2023-09-01 01:40:05,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683726058] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:05,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:05,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295910445] [2023-09-01 01:40:05,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:05,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:05,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 781 [2023-09-01 01:40:05,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 01:40:05,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:05,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 781 [2023-09-01 01:40:05,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:06,476 INFO L130 PetriNetUnfolder]: 3633/5128 cut-off events. [2023-09-01 01:40:06,477 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-09-01 01:40:06,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10447 conditions, 5128 events. 3633/5128 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23417 event pairs, 2856 based on Foata normal form. 0/2051 useless extension candidates. Maximal degree in co-relation 4490. Up to 2566 conditions per place. [2023-09-01 01:40:06,505 INFO L137 encePairwiseOnDemand]: 777/781 looper letters, 84 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-09-01 01:40:06,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 380 flow [2023-09-01 01:40:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1082 transitions. [2023-09-01 01:40:06,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46180110968843363 [2023-09-01 01:40:06,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1082 transitions. [2023-09-01 01:40:06,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1082 transitions. [2023-09-01 01:40:06,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:06,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1082 transitions. [2023-09-01 01:40:06,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.6666666666667) internal successors, (1082), 3 states have internal predecessors, (1082), 0 states have call successors, (0), 0 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 01:40:06,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:06,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:06,543 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 1082 transitions. [2023-09-01 01:40:06,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 380 flow [2023-09-01 01:40:06,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 356 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:40:06,560 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-09-01 01:40:06,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-09-01 01:40:06,564 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-09-01 01:40:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-09-01 01:40:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 01:40:06,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:06,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:40:06,580 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 01:40:06,775 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 01:40:06,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:06,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash 47276, now seen corresponding path program 1 times [2023-09-01 01:40:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:06,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700759430] [2023-09-01 01:40:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:06,778 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 01:40:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:06,779 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 01:40:06,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:40:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:40:06,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:06,907 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:40:06,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:40:06,923 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 01:40:06,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:06,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:06,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700759430] [2023-09-01 01:40:06,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700759430] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:06,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:06,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986492428] [2023-09-01 01:40:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:06,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:07,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 781 [2023-09-01 01:40:07,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 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 01:40:07,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:07,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 781 [2023-09-01 01:40:07,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:07,758 INFO L130 PetriNetUnfolder]: 3633/5126 cut-off events. [2023-09-01 01:40:07,759 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2023-09-01 01:40:07,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 5126 events. 3633/5126 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23463 event pairs, 2856 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 5159. Up to 5126 conditions per place. [2023-09-01 01:40:07,784 INFO L137 encePairwiseOnDemand]: 779/781 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-09-01 01:40:07,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 192 flow [2023-09-01 01:40:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1040 transitions. [2023-09-01 01:40:07,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387537345283823 [2023-09-01 01:40:07,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1040 transitions. [2023-09-01 01:40:07,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1040 transitions. [2023-09-01 01:40:07,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:07,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1040 transitions. [2023-09-01 01:40:07,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 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 01:40:07,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:07,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:07,798 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 1040 transitions. [2023-09-01 01:40:07,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 192 flow [2023-09-01 01:40:07,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:07,800 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 104 flow [2023-09-01 01:40:07,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-09-01 01:40:07,801 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-09-01 01:40:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 104 flow [2023-09-01 01:40:07,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 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 01:40:07,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:07,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:40:07,813 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 01:40:08,012 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 01:40:08,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:08,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash 47387, now seen corresponding path program 1 times [2023-09-01 01:40:08,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:08,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451963224] [2023-09-01 01:40:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:08,014 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 01:40:08,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:08,018 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 01:40:08,019 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 01:40:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:40:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:08,096 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 01:40:08,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:08,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:08,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451963224] [2023-09-01 01:40:08,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451963224] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:08,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:08,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:08,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736603858] [2023-09-01 01:40:08,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:08,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:08,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:08,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:08,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 781 [2023-09-01 01:40:08,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 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 01:40:08,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:08,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 781 [2023-09-01 01:40:08,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:08,555 INFO L130 PetriNetUnfolder]: 1817/2565 cut-off events. [2023-09-01 01:40:08,555 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 01:40:08,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5170 conditions, 2565 events. 1817/2565 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10289 event pairs, 1428 based on Foata normal form. 1/1029 useless extension candidates. Maximal degree in co-relation 5162. Up to 2565 conditions per place. [2023-09-01 01:40:08,567 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 42 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 01:40:08,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 192 flow [2023-09-01 01:40:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-09-01 01:40:08,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44899701237729406 [2023-09-01 01:40:08,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-09-01 01:40:08,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-09-01 01:40:08,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:08,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-09-01 01:40:08,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 01:40:08,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:08,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:08,580 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 104 flow. Second operand 3 states and 1052 transitions. [2023-09-01 01:40:08,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 192 flow [2023-09-01 01:40:08,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 189 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:08,586 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 113 flow [2023-09-01 01:40:08,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-09-01 01:40:08,588 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-09-01 01:40:08,588 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 113 flow [2023-09-01 01:40:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 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 01:40:08,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:08,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:40:08,601 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 01:40:08,799 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 01:40:08,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:08,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1470721, now seen corresponding path program 1 times [2023-09-01 01:40:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:08,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085488607] [2023-09-01 01:40:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:08,800 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 01:40:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:08,801 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 01:40:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 01:40:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:40:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:08,891 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 01:40:08,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:08,920 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 01:40:08,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085488607] [2023-09-01 01:40:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085488607] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:08,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:08,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:40:08,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204255717] [2023-09-01 01:40:08,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:40:08,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:40:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:40:09,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 781 [2023-09-01 01:40:09,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 01:40:09,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:09,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 781 [2023-09-01 01:40:09,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:09,632 INFO L130 PetriNetUnfolder]: 1818/2569 cut-off events. [2023-09-01 01:40:09,633 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 01:40:09,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5188 conditions, 2569 events. 1818/2569 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10292 event pairs, 1428 based on Foata normal form. 2/1032 useless extension candidates. Maximal degree in co-relation 5178. Up to 2564 conditions per place. [2023-09-01 01:40:09,645 INFO L137 encePairwiseOnDemand]: 775/781 looper letters, 43 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-09-01 01:40:09,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 225 flow [2023-09-01 01:40:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:40:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:40:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1719 transitions. [2023-09-01 01:40:09,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44020486555697824 [2023-09-01 01:40:09,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1719 transitions. [2023-09-01 01:40:09,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1719 transitions. [2023-09-01 01:40:09,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:09,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1719 transitions. [2023-09-01 01:40:09,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 343.8) internal successors, (1719), 5 states have internal predecessors, (1719), 0 states have call successors, (0), 0 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 01:40:09,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:09,665 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:09,666 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 113 flow. Second operand 5 states and 1719 transitions. [2023-09-01 01:40:09,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 225 flow [2023-09-01 01:40:09,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:40:09,668 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 155 flow [2023-09-01 01:40:09,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-09-01 01:40:09,669 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-09-01 01:40:09,670 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 155 flow [2023-09-01 01:40:09,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 01:40:09,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:09,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:40:09,682 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 01:40:09,880 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 01:40:09,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:09,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1470611, now seen corresponding path program 1 times [2023-09-01 01:40:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:09,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225789860] [2023-09-01 01:40:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:09,881 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 01:40:09,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:09,882 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 01:40:09,885 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 01:40:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:09,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:40:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:10,055 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:10,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:40:10,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:10,191 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 01:40:10,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225789860] [2023-09-01 01:40:10,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225789860] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:10,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:10,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:40:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064982619] [2023-09-01 01:40:10,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:10,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:40:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:40:10,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:40:11,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 781 [2023-09-01 01:40:11,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 01:40:11,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:11,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 781 [2023-09-01 01:40:11,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:11,695 INFO L130 PetriNetUnfolder]: 1817/2567 cut-off events. [2023-09-01 01:40:11,695 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:40:11,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5198 conditions, 2567 events. 1817/2567 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10276 event pairs, 1428 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5185. Up to 2565 conditions per place. [2023-09-01 01:40:11,706 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-09-01 01:40:11,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 241 flow [2023-09-01 01:40:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:40:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:40:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1693 transitions. [2023-09-01 01:40:11,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43354673495518564 [2023-09-01 01:40:11,711 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1693 transitions. [2023-09-01 01:40:11,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1693 transitions. [2023-09-01 01:40:11,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:11,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1693 transitions. [2023-09-01 01:40:11,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 338.6) internal successors, (1693), 5 states have internal predecessors, (1693), 0 states have call successors, (0), 0 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 01:40:11,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:11,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:11,723 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 155 flow. Second operand 5 states and 1693 transitions. [2023-09-01 01:40:11,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 241 flow [2023-09-01 01:40:11,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 224 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 01:40:11,725 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 140 flow [2023-09-01 01:40:11,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-09-01 01:40:11,726 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-09-01 01:40:11,726 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 140 flow [2023-09-01 01:40:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 01:40:11,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:11,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-09-01 01:40:11,739 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 01:40:11,936 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 01:40:11,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:11,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1413418049, now seen corresponding path program 2 times [2023-09-01 01:40:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:11,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679641753] [2023-09-01 01:40:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:40:11,939 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 01:40:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:11,940 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 01:40:11,942 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 01:40:11,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:40:11,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:40:11,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 01:40:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:12,059 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-09-01 01:40:12,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-09-01 01:40:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:12,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:12,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679641753] [2023-09-01 01:40:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679641753] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:12,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:12,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:12,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432728060] [2023-09-01 01:40:12,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:12,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:12,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 781 [2023-09-01 01:40:12,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 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 01:40:12,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:12,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 781 [2023-09-01 01:40:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:12,632 INFO L130 PetriNetUnfolder]: 1442/2066 cut-off events. [2023-09-01 01:40:12,633 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 01:40:12,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 2066 events. 1442/2066 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8082 event pairs, 1128 based on Foata normal form. 0/881 useless extension candidates. Maximal degree in co-relation 4176. Up to 2066 conditions per place. [2023-09-01 01:40:12,641 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-09-01 01:40:12,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 218 flow [2023-09-01 01:40:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1039 transitions. [2023-09-01 01:40:12,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434485702091336 [2023-09-01 01:40:12,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1039 transitions. [2023-09-01 01:40:12,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1039 transitions. [2023-09-01 01:40:12,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:12,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1039 transitions. [2023-09-01 01:40:12,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 01:40:12,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:12,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:12,652 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 140 flow. Second operand 3 states and 1039 transitions. [2023-09-01 01:40:12,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 218 flow [2023-09-01 01:40:12,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 207 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 01:40:12,654 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 121 flow [2023-09-01 01:40:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-09-01 01:40:12,655 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-09-01 01:40:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 121 flow [2023-09-01 01:40:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 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 01:40:12,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:12,656 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-09-01 01:40:12,667 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 (7)] Ended with exit code 0 [2023-09-01 01:40:12,864 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 01:40:12,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:12,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1413418051, now seen corresponding path program 1 times [2023-09-01 01:40:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:12,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366333049] [2023-09-01 01:40:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:12,865 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 01:40:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:12,866 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 01:40:12,871 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 01:40:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:40:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:12,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:40:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:40:12,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:40:13,037 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-09-01 01:40:13,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-09-01 01:40:13,052 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:40:13,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 01:40:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:13,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:13,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366333049] [2023-09-01 01:40:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366333049] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275874699] [2023-09-01 01:40:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:13,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:13,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 781 [2023-09-01 01:40:13,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 01:40:13,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:13,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 781 [2023-09-01 01:40:13,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:13,563 INFO L130 PetriNetUnfolder]: 1067/1565 cut-off events. [2023-09-01 01:40:13,563 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:40:13,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1565 events. 1067/1565 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5921 event pairs, 828 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 3166. Up to 1565 conditions per place. [2023-09-01 01:40:13,569 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-09-01 01:40:13,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 195 flow [2023-09-01 01:40:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2023-09-01 01:40:13,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413145539906103 [2023-09-01 01:40:13,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2023-09-01 01:40:13,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2023-09-01 01:40:13,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:13,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2023-09-01 01:40:13,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 01:40:13,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:13,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:13,579 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 121 flow. Second operand 3 states and 1034 transitions. [2023-09-01 01:40:13,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 195 flow [2023-09-01 01:40:13,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:13,580 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 112 flow [2023-09-01 01:40:13,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-09-01 01:40:13,581 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-09-01 01:40:13,581 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 112 flow [2023-09-01 01:40:13,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 01:40:13,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:13,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-09-01 01:40:13,595 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 01:40:13,791 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 01:40:13,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:13,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1413417939, now seen corresponding path program 2 times [2023-09-01 01:40:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826340086] [2023-09-01 01:40:13,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:40:13,792 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 01:40:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:13,793 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 01:40:13,799 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 01:40:13,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:40:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:40:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:40:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:40:13,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:40:13,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826340086] [2023-09-01 01:40:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826340086] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:13,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:13,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:40:13,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670723938] [2023-09-01 01:40:13,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:13,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:40:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:40:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:40:14,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 781 [2023-09-01 01:40:14,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 112 flow. Second operand has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:40:14,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:14,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 781 [2023-09-01 01:40:14,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:14,638 INFO L130 PetriNetUnfolder]: 1066/1563 cut-off events. [2023-09-01 01:40:14,638 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:40:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 1563 events. 1066/1563 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5900 event pairs, 828 based on Foata normal form. 2/731 useless extension candidates. Maximal degree in co-relation 3161. Up to 1560 conditions per place. [2023-09-01 01:40:14,644 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-09-01 01:40:14,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 184 flow [2023-09-01 01:40:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:40:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:40:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2040 transitions. [2023-09-01 01:40:14,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353393085787452 [2023-09-01 01:40:14,650 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2040 transitions. [2023-09-01 01:40:14,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2040 transitions. [2023-09-01 01:40:14,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:14,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2040 transitions. [2023-09-01 01:40:14,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 340.0) internal successors, (2040), 6 states have internal predecessors, (2040), 0 states have call successors, (0), 0 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 01:40:14,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 781.0) internal successors, (5467), 7 states have internal predecessors, (5467), 0 states have call successors, (0), 0 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 01:40:14,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 781.0) internal successors, (5467), 7 states have internal predecessors, (5467), 0 states have call successors, (0), 0 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 01:40:14,661 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 112 flow. Second operand 6 states and 2040 transitions. [2023-09-01 01:40:14,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 184 flow [2023-09-01 01:40:14,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:40:14,663 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 109 flow [2023-09-01 01:40:14,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-09-01 01:40:14,663 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-09-01 01:40:14,663 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 109 flow [2023-09-01 01:40:14,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:40:14,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:14,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-09-01 01:40:14,679 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 01:40:14,879 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 01:40:14,880 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:14,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1085113836, now seen corresponding path program 1 times [2023-09-01 01:40:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:14,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144095684] [2023-09-01 01:40:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:14,881 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 01:40:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:14,882 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 01:40:14,884 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 01:40:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:40:14,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:15,034 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 01:40:15,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-09-01 01:40:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:15,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:15,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144095684] [2023-09-01 01:40:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144095684] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:15,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:15,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149078332] [2023-09-01 01:40:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:15,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 781 [2023-09-01 01:40:15,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 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 01:40:15,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:15,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 781 [2023-09-01 01:40:15,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:15,626 INFO L130 PetriNetUnfolder]: 1011/1478 cut-off events. [2023-09-01 01:40:15,626 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:40:15,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 1478 events. 1011/1478 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5532 event pairs, 784 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 2993. Up to 1478 conditions per place. [2023-09-01 01:40:15,633 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 01:40:15,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 181 flow [2023-09-01 01:40:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2023-09-01 01:40:15,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413145539906103 [2023-09-01 01:40:15,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2023-09-01 01:40:15,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2023-09-01 01:40:15,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:15,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2023-09-01 01:40:15,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 01:40:15,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:15,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:15,643 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 109 flow. Second operand 3 states and 1034 transitions. [2023-09-01 01:40:15,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 181 flow [2023-09-01 01:40:15,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 174 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:40:15,644 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 100 flow [2023-09-01 01:40:15,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-09-01 01:40:15,645 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-09-01 01:40:15,645 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 100 flow [2023-09-01 01:40:15,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 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 01:40:15,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:15,646 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-09-01 01:40:15,660 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 01:40:15,855 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 01:40:15,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:15,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1085113837, now seen corresponding path program 1 times [2023-09-01 01:40:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:15,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108357124] [2023-09-01 01:40:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:15,857 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 01:40:15,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:15,858 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 01:40:15,860 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 01:40:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:40:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:40:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:40:16,013 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-09-01 01:40:16,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-09-01 01:40:16,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 01:40:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:16,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:16,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:16,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108357124] [2023-09-01 01:40:16,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108357124] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:16,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:16,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309080185] [2023-09-01 01:40:16,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:16,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:16,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 781 [2023-09-01 01:40:16,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 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 01:40:16,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:16,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 781 [2023-09-01 01:40:16,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:16,470 INFO L130 PetriNetUnfolder]: 956/1393 cut-off events. [2023-09-01 01:40:16,470 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:40:16,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 1393 events. 956/1393 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5146 event pairs, 740 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 2821. Up to 1393 conditions per place. [2023-09-01 01:40:16,475 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-09-01 01:40:16,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 168 flow [2023-09-01 01:40:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1029 transitions. [2023-09-01 01:40:16,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43918053777208704 [2023-09-01 01:40:16,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1029 transitions. [2023-09-01 01:40:16,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1029 transitions. [2023-09-01 01:40:16,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:16,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1029 transitions. [2023-09-01 01:40:16,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 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 01:40:16,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:16,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:16,485 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 100 flow. Second operand 3 states and 1029 transitions. [2023-09-01 01:40:16,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 168 flow [2023-09-01 01:40:16,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:16,487 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 97 flow [2023-09-01 01:40:16,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-09-01 01:40:16,487 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-09-01 01:40:16,487 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 97 flow [2023-09-01 01:40:16,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 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 01:40:16,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:16,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-09-01 01:40:16,503 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 01:40:16,697 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 01:40:16,697 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:16,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -721211347, now seen corresponding path program 1 times [2023-09-01 01:40:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734525832] [2023-09-01 01:40:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:16,698 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 01:40:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:16,701 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 01:40:16,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:40:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:40:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:16,868 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:16,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:16,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:16,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734525832] [2023-09-01 01:40:16,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734525832] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:40:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218452823] [2023-09-01 01:40:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:16,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:40:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:40:16,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:40:17,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 781 [2023-09-01 01:40:17,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 327.2) internal successors, (1636), 5 states have internal predecessors, (1636), 0 states have call successors, (0), 0 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 01:40:17,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:17,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 781 [2023-09-01 01:40:17,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:17,550 INFO L130 PetriNetUnfolder]: 1577/2302 cut-off events. [2023-09-01 01:40:17,550 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:40:17,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 2302 events. 1577/2302 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10264 event pairs, 740 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 4657. Up to 1389 conditions per place. [2023-09-01 01:40:17,559 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 60 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-09-01 01:40:17,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 286 flow [2023-09-01 01:40:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:40:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:40:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1693 transitions. [2023-09-01 01:40:17,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43354673495518564 [2023-09-01 01:40:17,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1693 transitions. [2023-09-01 01:40:17,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1693 transitions. [2023-09-01 01:40:17,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:17,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1693 transitions. [2023-09-01 01:40:17,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 338.6) internal successors, (1693), 5 states have internal predecessors, (1693), 0 states have call successors, (0), 0 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 01:40:17,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:17,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:17,574 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 97 flow. Second operand 5 states and 1693 transitions. [2023-09-01 01:40:17,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 286 flow [2023-09-01 01:40:17,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:17,575 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 112 flow [2023-09-01 01:40:17,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-09-01 01:40:17,576 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-09-01 01:40:17,576 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 112 flow [2023-09-01 01:40:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.2) internal successors, (1636), 5 states have internal predecessors, (1636), 0 states have call successors, (0), 0 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 01:40:17,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:17,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-09-01 01:40:17,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:17,786 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 01:40:17,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:17,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -721211349, now seen corresponding path program 1 times [2023-09-01 01:40:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:17,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574707324] [2023-09-01 01:40:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:17,787 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 01:40:17,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:17,788 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 01:40:17,789 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 01:40:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:40:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:17,931 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:40:17,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:40:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:17,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:17,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:17,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574707324] [2023-09-01 01:40:17,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574707324] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:17,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:17,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:40:17,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143194409] [2023-09-01 01:40:17,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:17,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:40:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:40:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:40:18,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 781 [2023-09-01 01:40:18,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 325.5) internal successors, (1302), 4 states have internal predecessors, (1302), 0 states have call successors, (0), 0 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 01:40:18,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:18,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 781 [2023-09-01 01:40:18,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:18,369 INFO L130 PetriNetUnfolder]: 845/1250 cut-off events. [2023-09-01 01:40:18,370 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2023-09-01 01:40:18,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 1250 events. 845/1250 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4511 event pairs, 635 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2786. Up to 1246 conditions per place. [2023-09-01 01:40:18,375 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-09-01 01:40:18,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 34 transitions, 174 flow [2023-09-01 01:40:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:40:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:40:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1330 transitions. [2023-09-01 01:40:18,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42573623559539053 [2023-09-01 01:40:18,380 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1330 transitions. [2023-09-01 01:40:18,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1330 transitions. [2023-09-01 01:40:18,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:18,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1330 transitions. [2023-09-01 01:40:18,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 01:40:18,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 781.0) internal successors, (3905), 5 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:40:18,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 781.0) internal successors, (3905), 5 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:40:18,387 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 112 flow. Second operand 4 states and 1330 transitions. [2023-09-01 01:40:18,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 34 transitions, 174 flow [2023-09-01 01:40:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 34 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:40:18,389 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 104 flow [2023-09-01 01:40:18,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-09-01 01:40:18,390 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-09-01 01:40:18,390 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 104 flow [2023-09-01 01:40:18,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 325.5) internal successors, (1302), 4 states have internal predecessors, (1302), 0 states have call successors, (0), 0 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 01:40:18,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:18,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:18,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:18,600 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 01:40:18,600 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:18,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -882624075, now seen corresponding path program 1 times [2023-09-01 01:40:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:18,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564434799] [2023-09-01 01:40:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:18,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:18,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:18,603 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 01:40:18,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 01:40:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:40:18,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:40:18,792 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 01:40:18,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 01:40:18,806 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 342 treesize of output 334 [2023-09-01 01:40:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:18,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:18,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:18,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564434799] [2023-09-01 01:40:18,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564434799] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:18,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:18,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524169136] [2023-09-01 01:40:18,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:18,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:18,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 781 [2023-09-01 01:40:18,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 335.3333333333333) internal successors, (1006), 3 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 01:40:18,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:18,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 781 [2023-09-01 01:40:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:19,245 INFO L130 PetriNetUnfolder]: 789/1162 cut-off events. [2023-09-01 01:40:19,245 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-09-01 01:40:19,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1162 events. 789/1162 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4098 event pairs, 591 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 2544. Up to 1162 conditions per place. [2023-09-01 01:40:19,251 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 01:40:19,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 32 transitions, 164 flow [2023-09-01 01:40:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-09-01 01:40:19,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43960734101579174 [2023-09-01 01:40:19,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-09-01 01:40:19,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-09-01 01:40:19,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:19,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-09-01 01:40:19,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 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 01:40:19,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:19,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:19,263 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 104 flow. Second operand 3 states and 1030 transitions. [2023-09-01 01:40:19,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 32 transitions, 164 flow [2023-09-01 01:40:19,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:40:19,264 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 99 flow [2023-09-01 01:40:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-09-01 01:40:19,266 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-09-01 01:40:19,266 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 99 flow [2023-09-01 01:40:19,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.3333333333333) internal successors, (1006), 3 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 01:40:19,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:19,266 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:19,287 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 01:40:19,487 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 01:40:19,488 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:19,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash -882624074, now seen corresponding path program 1 times [2023-09-01 01:40:19,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:19,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819373514] [2023-09-01 01:40:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:19,489 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 01:40:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:19,490 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 01:40:19,491 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 01:40:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:40:19,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:19,663 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 01:40:19,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 01:40:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:19,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:19,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:19,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819373514] [2023-09-01 01:40:19,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819373514] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:19,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:40:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319347318] [2023-09-01 01:40:19,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:19,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:40:19,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:40:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:40:19,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 781 [2023-09-01 01:40:19,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 0 states have call successors, (0), 0 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 01:40:19,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:19,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 781 [2023-09-01 01:40:19,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:19,947 INFO L130 PetriNetUnfolder]: 733/1074 cut-off events. [2023-09-01 01:40:19,947 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-09-01 01:40:19,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1074 events. 733/1074 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3721 event pairs, 547 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 2352. Up to 1074 conditions per place. [2023-09-01 01:40:19,953 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 01:40:19,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 30 transitions, 155 flow [2023-09-01 01:40:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:40:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:40:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-09-01 01:40:19,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43363209560392657 [2023-09-01 01:40:19,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-09-01 01:40:19,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-09-01 01:40:19,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:19,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-09-01 01:40:19,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 01:40:19,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:19,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 781.0) internal successors, (3124), 4 states have internal predecessors, (3124), 0 states have call successors, (0), 0 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 01:40:19,963 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 99 flow. Second operand 3 states and 1016 transitions. [2023-09-01 01:40:19,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 30 transitions, 155 flow [2023-09-01 01:40:19,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 30 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:19,965 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 96 flow [2023-09-01 01:40:19,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-09-01 01:40:19,965 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-09-01 01:40:19,965 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 96 flow [2023-09-01 01:40:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 0 states have call successors, (0), 0 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 01:40:19,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:19,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:19,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:20,176 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 01:40:20,176 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:20,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -882713886, now seen corresponding path program 1 times [2023-09-01 01:40:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535114244] [2023-09-01 01:40:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:20,179 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 01:40:20,182 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 01:40:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:40:20,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:20,365 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:20,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:20,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:20,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535114244] [2023-09-01 01:40:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535114244] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:20,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:20,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:40:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075737181] [2023-09-01 01:40:20,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:20,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:40:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:40:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:40:22,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 781 [2023-09-01 01:40:22,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 96 flow. Second operand has 10 states, 10 states have (on average 326.4) internal successors, (3264), 10 states have internal predecessors, (3264), 0 states have call successors, (0), 0 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 01:40:22,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:22,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 781 [2023-09-01 01:40:22,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:22,993 INFO L130 PetriNetUnfolder]: 1269/1862 cut-off events. [2023-09-01 01:40:22,993 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2023-09-01 01:40:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4049 conditions, 1862 events. 1269/1862 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7925 event pairs, 333 based on Foata normal form. 0/1316 useless extension candidates. Maximal degree in co-relation 4032. Up to 676 conditions per place. [2023-09-01 01:40:23,000 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 86 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-09-01 01:40:23,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 92 transitions, 423 flow [2023-09-01 01:40:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:40:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:40:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2367 transitions. [2023-09-01 01:40:23,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329614047923907 [2023-09-01 01:40:23,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2367 transitions. [2023-09-01 01:40:23,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2367 transitions. [2023-09-01 01:40:23,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:23,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2367 transitions. [2023-09-01 01:40:23,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 338.14285714285717) internal successors, (2367), 7 states have internal predecessors, (2367), 0 states have call successors, (0), 0 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 01:40:23,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 781.0) internal successors, (6248), 8 states have internal predecessors, (6248), 0 states have call successors, (0), 0 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 01:40:23,028 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 781.0) internal successors, (6248), 8 states have internal predecessors, (6248), 0 states have call successors, (0), 0 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 01:40:23,028 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 96 flow. Second operand 7 states and 2367 transitions. [2023-09-01 01:40:23,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 92 transitions, 423 flow [2023-09-01 01:40:23,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 92 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:40:23,030 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 125 flow [2023-09-01 01:40:23,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=125, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-09-01 01:40:23,031 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-09-01 01:40:23,031 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 125 flow [2023-09-01 01:40:23,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 326.4) internal successors, (3264), 10 states have internal predecessors, (3264), 0 states have call successors, (0), 0 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 01:40:23,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:23,032 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:23,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:23,247 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 01:40:23,248 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:23,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1591542639, now seen corresponding path program 1 times [2023-09-01 01:40:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:23,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980520851] [2023-09-01 01:40:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:23,249 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 01:40:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:23,250 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 01:40:23,250 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 01:40:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:40:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:23,407 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:23,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:23,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:23,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980520851] [2023-09-01 01:40:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980520851] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:23,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:23,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:40:23,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387628918] [2023-09-01 01:40:23,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:23,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:40:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:40:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:40:23,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 781 [2023-09-01 01:40:23,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 01:40:23,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:23,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 781 [2023-09-01 01:40:23,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:24,140 INFO L130 PetriNetUnfolder]: 1909/2806 cut-off events. [2023-09-01 01:40:24,140 INFO L131 PetriNetUnfolder]: For 1638/1638 co-relation queries the response was YES. [2023-09-01 01:40:24,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 2806 events. 1909/2806 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12570 event pairs, 975 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 6619. Up to 1858 conditions per place. [2023-09-01 01:40:24,151 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-09-01 01:40:24,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 311 flow [2023-09-01 01:40:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:40:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:40:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1677 transitions. [2023-09-01 01:40:24,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429449423815621 [2023-09-01 01:40:24,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1677 transitions. [2023-09-01 01:40:24,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1677 transitions. [2023-09-01 01:40:24,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:24,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1677 transitions. [2023-09-01 01:40:24,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 335.4) internal successors, (1677), 5 states have internal predecessors, (1677), 0 states have call successors, (0), 0 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 01:40:24,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:24,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:24,165 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 125 flow. Second operand 5 states and 1677 transitions. [2023-09-01 01:40:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 311 flow [2023-09-01 01:40:24,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 296 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 01:40:24,168 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 132 flow [2023-09-01 01:40:24,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2023-09-01 01:40:24,168 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-09-01 01:40:24,168 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 132 flow [2023-09-01 01:40:24,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 01:40:24,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:24,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:24,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:24,379 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 01:40:24,380 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:24,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2093179504, now seen corresponding path program 1 times [2023-09-01 01:40:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:24,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335515394] [2023-09-01 01:40:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:24,380 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 01:40:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:24,381 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 01:40:24,382 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 01:40:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:40:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:24,565 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:24,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:24,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:24,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:24,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335515394] [2023-09-01 01:40:24,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335515394] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:24,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:40:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480421189] [2023-09-01 01:40:24,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:24,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:40:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:40:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:40:26,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 781 [2023-09-01 01:40:26,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 132 flow. Second operand has 10 states, 10 states have (on average 326.8) internal successors, (3268), 10 states have internal predecessors, (3268), 0 states have call successors, (0), 0 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 01:40:26,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:26,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 781 [2023-09-01 01:40:26,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:27,259 INFO L130 PetriNetUnfolder]: 3189/4694 cut-off events. [2023-09-01 01:40:27,259 INFO L131 PetriNetUnfolder]: For 2515/2515 co-relation queries the response was YES. [2023-09-01 01:40:27,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 4694 events. 3189/4694 cut-off events. For 2515/2515 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23433 event pairs, 975 based on Foata normal form. 0/3938 useless extension candidates. Maximal degree in co-relation 11654. Up to 1858 conditions per place. [2023-09-01 01:40:27,279 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 92 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-09-01 01:40:27,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 546 flow [2023-09-01 01:40:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:40:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:40:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2361 transitions. [2023-09-01 01:40:27,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318639107371502 [2023-09-01 01:40:27,285 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2361 transitions. [2023-09-01 01:40:27,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2361 transitions. [2023-09-01 01:40:27,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:27,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2361 transitions. [2023-09-01 01:40:27,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.2857142857143) internal successors, (2361), 7 states have internal predecessors, (2361), 0 states have call successors, (0), 0 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 01:40:27,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 781.0) internal successors, (6248), 8 states have internal predecessors, (6248), 0 states have call successors, (0), 0 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 01:40:27,295 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 781.0) internal successors, (6248), 8 states have internal predecessors, (6248), 0 states have call successors, (0), 0 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 01:40:27,296 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 132 flow. Second operand 7 states and 2361 transitions. [2023-09-01 01:40:27,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 546 flow [2023-09-01 01:40:27,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 98 transitions, 540 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:40:27,299 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 156 flow [2023-09-01 01:40:27,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2023-09-01 01:40:27,299 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-09-01 01:40:27,300 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 156 flow [2023-09-01 01:40:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 326.8) internal successors, (3268), 10 states have internal predecessors, (3268), 0 states have call successors, (0), 0 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 01:40:27,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:27,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-09-01 01:40:27,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:27,511 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 01:40:27,511 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:27,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2115524674, now seen corresponding path program 2 times [2023-09-01 01:40:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:27,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073284531] [2023-09-01 01:40:27,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:40:27,512 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 01:40:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:27,513 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 01:40:27,514 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 01:40:27,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:40:27,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:40:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:40:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:27,714 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:27,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:28,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073284531] [2023-09-01 01:40:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073284531] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:28,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:28,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-09-01 01:40:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748880135] [2023-09-01 01:40:28,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:40:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:40:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:40:30,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 781 [2023-09-01 01:40:30,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 156 flow. Second operand has 12 states, 12 states have (on average 326.5) internal successors, (3918), 12 states have internal predecessors, (3918), 0 states have call successors, (0), 0 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 01:40:30,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:30,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 781 [2023-09-01 01:40:30,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:31,575 INFO L130 PetriNetUnfolder]: 2845/4248 cut-off events. [2023-09-01 01:40:31,575 INFO L131 PetriNetUnfolder]: For 3566/3566 co-relation queries the response was YES. [2023-09-01 01:40:31,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11170 conditions, 4248 events. 2845/4248 cut-off events. For 3566/3566 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22077 event pairs, 111 based on Foata normal form. 204/3868 useless extension candidates. Maximal degree in co-relation 11147. Up to 1000 conditions per place. [2023-09-01 01:40:31,589 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 112 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-09-01 01:40:31,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 118 transitions, 685 flow [2023-09-01 01:40:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:40:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:40:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2703 transitions. [2023-09-01 01:40:31,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43261843790012805 [2023-09-01 01:40:31,594 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2703 transitions. [2023-09-01 01:40:31,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2703 transitions. [2023-09-01 01:40:31,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:31,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2703 transitions. [2023-09-01 01:40:31,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 337.875) internal successors, (2703), 8 states have internal predecessors, (2703), 0 states have call successors, (0), 0 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 01:40:31,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 781.0) internal successors, (7029), 9 states have internal predecessors, (7029), 0 states have call successors, (0), 0 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 01:40:31,604 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 781.0) internal successors, (7029), 9 states have internal predecessors, (7029), 0 states have call successors, (0), 0 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 01:40:31,604 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 156 flow. Second operand 8 states and 2703 transitions. [2023-09-01 01:40:31,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 118 transitions, 685 flow [2023-09-01 01:40:31,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 118 transitions, 643 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-09-01 01:40:31,613 INFO L231 Difference]: Finished difference. Result has 58 places, 33 transitions, 136 flow [2023-09-01 01:40:31,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=136, PETRI_PLACES=58, PETRI_TRANSITIONS=33} [2023-09-01 01:40:31,614 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-09-01 01:40:31,614 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 33 transitions, 136 flow [2023-09-01 01:40:31,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 326.5) internal successors, (3918), 12 states have internal predecessors, (3918), 0 states have call successors, (0), 0 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 01:40:31,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:31,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:31,628 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 01:40:31,825 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 01:40:31,826 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:31,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash -462939428, now seen corresponding path program 1 times [2023-09-01 01:40:31,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:31,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197064581] [2023-09-01 01:40:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:31,826 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 01:40:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:31,827 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 01:40:31,832 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 01:40:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:40:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:31,997 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:31,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:32,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:32,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:32,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197064581] [2023-09-01 01:40:32,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197064581] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:32,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:32,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:40:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552504027] [2023-09-01 01:40:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:32,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:40:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:40:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:40:32,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 781 [2023-09-01 01:40:32,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 33 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 01:40:32,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:32,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 781 [2023-09-01 01:40:32,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:32,981 INFO L130 PetriNetUnfolder]: 4089/6108 cut-off events. [2023-09-01 01:40:32,981 INFO L131 PetriNetUnfolder]: For 4326/4326 co-relation queries the response was YES. [2023-09-01 01:40:32,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15425 conditions, 6108 events. 4089/6108 cut-off events. For 4326/4326 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32042 event pairs, 2431 based on Foata normal form. 0/5232 useless extension candidates. Maximal degree in co-relation 15405. Up to 4244 conditions per place. [2023-09-01 01:40:32,998 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-09-01 01:40:32,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 327 flow [2023-09-01 01:40:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:40:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:40:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1673 transitions. [2023-09-01 01:40:33,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284250960307298 [2023-09-01 01:40:33,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1673 transitions. [2023-09-01 01:40:33,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1673 transitions. [2023-09-01 01:40:33,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:33,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1673 transitions. [2023-09-01 01:40:33,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.6) internal successors, (1673), 5 states have internal predecessors, (1673), 0 states have call successors, (0), 0 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 01:40:33,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:33,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 781.0) internal successors, (4686), 6 states have internal predecessors, (4686), 0 states have call successors, (0), 0 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 01:40:33,007 INFO L175 Difference]: Start difference. First operand has 58 places, 33 transitions, 136 flow. Second operand 5 states and 1673 transitions. [2023-09-01 01:40:33,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 327 flow [2023-09-01 01:40:33,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 309 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:40:33,011 INFO L231 Difference]: Finished difference. Result has 57 places, 34 transitions, 141 flow [2023-09-01 01:40:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2023-09-01 01:40:33,012 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-09-01 01:40:33,012 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 141 flow [2023-09-01 01:40:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 01:40:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:33,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:33,221 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:33,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1466219012, now seen corresponding path program 1 times [2023-09-01 01:40:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:33,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507578795] [2023-09-01 01:40:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:33,222 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 01:40:33,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:33,223 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:40:33,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 01:40:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:40:33,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:33,408 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:33,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:33,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:33,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507578795] [2023-09-01 01:40:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507578795] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:33,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:40:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673788898] [2023-09-01 01:40:33,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:33,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:40:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:40:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:40:35,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 781 [2023-09-01 01:40:35,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 141 flow. Second operand has 10 states, 10 states have (on average 327.2) internal successors, (3272), 10 states have internal predecessors, (3272), 0 states have call successors, (0), 0 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 01:40:35,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:35,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 781 [2023-09-01 01:40:35,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:36,531 INFO L130 PetriNetUnfolder]: 6577/9828 cut-off events. [2023-09-01 01:40:36,532 INFO L131 PetriNetUnfolder]: For 6943/6943 co-relation queries the response was YES. [2023-09-01 01:40:36,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26052 conditions, 9828 events. 6577/9828 cut-off events. For 6943/6943 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 56006 event pairs, 2431 based on Foata normal form. 0/9536 useless extension candidates. Maximal degree in co-relation 26031. Up to 4244 conditions per place. [2023-09-01 01:40:36,560 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 90 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2023-09-01 01:40:36,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 563 flow [2023-09-01 01:40:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:40:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:40:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2351 transitions. [2023-09-01 01:40:36,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43003475397841595 [2023-09-01 01:40:36,566 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2351 transitions. [2023-09-01 01:40:36,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2351 transitions. [2023-09-01 01:40:36,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:36,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2351 transitions. [2023-09-01 01:40:36,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 335.85714285714283) internal successors, (2351), 7 states have internal predecessors, (2351), 0 states have call successors, (0), 0 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 01:40:36,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 781.0) internal successors, (6248), 8 states have internal predecessors, (6248), 0 states have call successors, (0), 0 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 01:40:36,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 781.0) internal successors, (6248), 8 states have internal predecessors, (6248), 0 states have call successors, (0), 0 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 01:40:36,573 INFO L175 Difference]: Start difference. First operand has 57 places, 34 transitions, 141 flow. Second operand 7 states and 2351 transitions. [2023-09-01 01:40:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 563 flow [2023-09-01 01:40:36,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 557 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:40:36,578 INFO L231 Difference]: Finished difference. Result has 62 places, 36 transitions, 165 flow [2023-09-01 01:40:36,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=62, PETRI_TRANSITIONS=36} [2023-09-01 01:40:36,579 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-09-01 01:40:36,579 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 36 transitions, 165 flow [2023-09-01 01:40:36,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 327.2) internal successors, (3272), 10 states have internal predecessors, (3272), 0 states have call successors, (0), 0 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 01:40:36,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:36,579 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:36,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:36,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:36,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:36,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1500743248, now seen corresponding path program 2 times [2023-09-01 01:40:36,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:36,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444687096] [2023-09-01 01:40:36,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:40:36,791 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 01:40:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:36,792 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:40:36,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 01:40:36,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:40:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:40:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:40:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:36,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:36,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444687096] [2023-09-01 01:40:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444687096] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:36,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:40:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567623562] [2023-09-01 01:40:36,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:40:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:40:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:40:37,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 781 [2023-09-01 01:40:37,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 36 transitions, 165 flow. Second operand has 10 states, 10 states have (on average 336.6) internal successors, (3366), 10 states have internal predecessors, (3366), 0 states have call successors, (0), 0 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 01:40:37,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:37,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 781 [2023-09-01 01:40:37,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:38,591 INFO L130 PetriNetUnfolder]: 5675/8648 cut-off events. [2023-09-01 01:40:38,591 INFO L131 PetriNetUnfolder]: For 8811/8811 co-relation queries the response was YES. [2023-09-01 01:40:38,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24153 conditions, 8648 events. 5675/8648 cut-off events. For 8811/8811 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 51371 event pairs, 337 based on Foata normal form. 556/9204 useless extension candidates. Maximal degree in co-relation 24130. Up to 1996 conditions per place. [2023-09-01 01:40:38,619 INFO L137 encePairwiseOnDemand]: 778/781 looper letters, 113 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-09-01 01:40:38,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 713 flow [2023-09-01 01:40:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:40:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:40:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2102 transitions. [2023-09-01 01:40:38,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485702091335894 [2023-09-01 01:40:38,623 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2102 transitions. [2023-09-01 01:40:38,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2102 transitions. [2023-09-01 01:40:38,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:38,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2102 transitions. [2023-09-01 01:40:38,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 350.3333333333333) internal successors, (2102), 6 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 01:40:38,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 781.0) internal successors, (5467), 7 states have internal predecessors, (5467), 0 states have call successors, (0), 0 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 01:40:38,629 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 781.0) internal successors, (5467), 7 states have internal predecessors, (5467), 0 states have call successors, (0), 0 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 01:40:38,629 INFO L175 Difference]: Start difference. First operand has 62 places, 36 transitions, 165 flow. Second operand 6 states and 2102 transitions. [2023-09-01 01:40:38,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 713 flow [2023-09-01 01:40:38,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 117 transitions, 671 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-09-01 01:40:38,656 INFO L231 Difference]: Finished difference. Result has 59 places, 34 transitions, 141 flow [2023-09-01 01:40:38,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2023-09-01 01:40:38,657 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-09-01 01:40:38,657 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 141 flow [2023-09-01 01:40:38,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 336.6) internal successors, (3366), 10 states have internal predecessors, (3366), 0 states have call successors, (0), 0 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 01:40:38,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:38,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:38,665 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 (22)] Ended with exit code 0 [2023-09-01 01:40:38,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:38,858 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:38,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash -287153668, now seen corresponding path program 2 times [2023-09-01 01:40:38,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:38,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376674516] [2023-09-01 01:40:38,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:40:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:38,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:40:38,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 01:40:38,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:40:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:40:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:40:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:39,090 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:40:39,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:40:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:39,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:39,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376674516] [2023-09-01 01:40:39,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376674516] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:40:39,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:40:39,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-09-01 01:40:39,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92291852] [2023-09-01 01:40:39,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:40:39,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:40:39,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:40:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:40:41,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 781 [2023-09-01 01:40:41,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 141 flow. Second operand has 12 states, 12 states have (on average 327.1666666666667) internal successors, (3926), 12 states have internal predecessors, (3926), 0 states have call successors, (0), 0 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 01:40:41,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:41,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 781 [2023-09-01 01:40:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:43,042 INFO L130 PetriNetUnfolder]: 4872/7579 cut-off events. [2023-09-01 01:40:43,043 INFO L131 PetriNetUnfolder]: For 4323/4323 co-relation queries the response was YES. [2023-09-01 01:40:43,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19628 conditions, 7579 events. 4872/7579 cut-off events. For 4323/4323 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 44413 event pairs, 576 based on Foata normal form. 532/8111 useless extension candidates. Maximal degree in co-relation 19609. Up to 1638 conditions per place. [2023-09-01 01:40:43,066 INFO L137 encePairwiseOnDemand]: 776/781 looper letters, 95 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2023-09-01 01:40:43,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 101 transitions, 562 flow [2023-09-01 01:40:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:40:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:40:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2681 transitions. [2023-09-01 01:40:43,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290973111395647 [2023-09-01 01:40:43,072 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2681 transitions. [2023-09-01 01:40:43,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2681 transitions. [2023-09-01 01:40:43,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:43,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2681 transitions. [2023-09-01 01:40:43,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 335.125) internal successors, (2681), 8 states have internal predecessors, (2681), 0 states have call successors, (0), 0 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 01:40:43,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 781.0) internal successors, (7029), 9 states have internal predecessors, (7029), 0 states have call successors, (0), 0 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 01:40:43,080 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 781.0) internal successors, (7029), 9 states have internal predecessors, (7029), 0 states have call successors, (0), 0 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 01:40:43,080 INFO L175 Difference]: Start difference. First operand has 59 places, 34 transitions, 141 flow. Second operand 8 states and 2681 transitions. [2023-09-01 01:40:43,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 101 transitions, 562 flow [2023-09-01 01:40:43,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 101 transitions, 518 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 01:40:43,111 INFO L231 Difference]: Finished difference. Result has 57 places, 32 transitions, 123 flow [2023-09-01 01:40:43,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=57, PETRI_TRANSITIONS=32} [2023-09-01 01:40:43,112 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-09-01 01:40:43,112 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 32 transitions, 123 flow [2023-09-01 01:40:43,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 327.1666666666667) internal successors, (3926), 12 states have internal predecessors, (3926), 0 states have call successors, (0), 0 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 01:40:43,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:43,113 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:43,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:43,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:43,322 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:43,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:43,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1532449246, now seen corresponding path program 1 times [2023-09-01 01:40:43,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:43,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304392876] [2023-09-01 01:40:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:43,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:43,325 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:40:43,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 01:40:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:40:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:43,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:43,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:43,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304392876] [2023-09-01 01:40:43,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304392876] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:43,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:43,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:40:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026197788] [2023-09-01 01:40:43,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:43,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:40:43,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:40:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:40:43,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 781 [2023-09-01 01:40:43,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 32 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 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 01:40:43,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:43,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 781 [2023-09-01 01:40:43,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:44,649 INFO L130 PetriNetUnfolder]: 4872/7563 cut-off events. [2023-09-01 01:40:44,650 INFO L131 PetriNetUnfolder]: For 3053/3053 co-relation queries the response was YES. [2023-09-01 01:40:44,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18838 conditions, 7563 events. 4872/7563 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 43621 event pairs, 3710 based on Foata normal form. 16/7579 useless extension candidates. Maximal degree in co-relation 18821. Up to 5788 conditions per place. [2023-09-01 01:40:44,668 INFO L137 encePairwiseOnDemand]: 777/781 looper letters, 45 selfloop transitions, 2 changer transitions 21/68 dead transitions. [2023-09-01 01:40:44,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 380 flow [2023-09-01 01:40:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:40:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:40:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1342 transitions. [2023-09-01 01:40:44,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295774647887324 [2023-09-01 01:40:44,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1342 transitions. [2023-09-01 01:40:44,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1342 transitions. [2023-09-01 01:40:44,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:44,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1342 transitions. [2023-09-01 01:40:44,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.5) internal successors, (1342), 4 states have internal predecessors, (1342), 0 states have call successors, (0), 0 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 01:40:44,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 781.0) internal successors, (3905), 5 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:40:44,674 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 781.0) internal successors, (3905), 5 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:40:44,674 INFO L175 Difference]: Start difference. First operand has 57 places, 32 transitions, 123 flow. Second operand 4 states and 1342 transitions. [2023-09-01 01:40:44,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 380 flow [2023-09-01 01:40:44,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 355 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:40:44,677 INFO L231 Difference]: Finished difference. Result has 56 places, 32 transitions, 122 flow [2023-09-01 01:40:44,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=32} [2023-09-01 01:40:44,679 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-09-01 01:40:44,679 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 32 transitions, 122 flow [2023-09-01 01:40:44,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 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 01:40:44,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:44,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:44,691 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 (24)] Ended with exit code 0 [2023-09-01 01:40:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:44,890 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:44,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1800459101, now seen corresponding path program 1 times [2023-09-01 01:40:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505804350] [2023-09-01 01:40:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:44,891 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 01:40:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:44,893 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:40:44,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 01:40:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:40:45,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:40:45,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:40:45,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:40:45,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505804350] [2023-09-01 01:40:45,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505804350] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:40:45,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:40:45,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:40:45,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394236742] [2023-09-01 01:40:45,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:40:45,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:40:45,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:40:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:40:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:40:45,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 781 [2023-09-01 01:40:45,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 32 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:40:45,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:40:45,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 781 [2023-09-01 01:40:45,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:40:46,198 INFO L130 PetriNetUnfolder]: 4115/6362 cut-off events. [2023-09-01 01:40:46,198 INFO L131 PetriNetUnfolder]: For 3031/3031 co-relation queries the response was YES. [2023-09-01 01:40:46,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 6362 events. 4115/6362 cut-off events. For 3031/3031 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 35238 event pairs, 3151 based on Foata normal form. 12/6374 useless extension candidates. Maximal degree in co-relation 16410. Up to 4905 conditions per place. [2023-09-01 01:40:46,219 INFO L137 encePairwiseOnDemand]: 777/781 looper letters, 45 selfloop transitions, 2 changer transitions 19/66 dead transitions. [2023-09-01 01:40:46,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 372 flow [2023-09-01 01:40:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:40:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:40:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1340 transitions. [2023-09-01 01:40:46,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42893725992317544 [2023-09-01 01:40:46,222 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1340 transitions. [2023-09-01 01:40:46,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1340 transitions. [2023-09-01 01:40:46,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:40:46,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1340 transitions. [2023-09-01 01:40:46,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 01:40:46,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 781.0) internal successors, (3905), 5 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:40:46,226 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 781.0) internal successors, (3905), 5 states have internal predecessors, (3905), 0 states have call successors, (0), 0 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 01:40:46,226 INFO L175 Difference]: Start difference. First operand has 56 places, 32 transitions, 122 flow. Second operand 4 states and 1340 transitions. [2023-09-01 01:40:46,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 372 flow [2023-09-01 01:40:46,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 352 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 01:40:46,228 INFO L231 Difference]: Finished difference. Result has 57 places, 32 transitions, 124 flow [2023-09-01 01:40:46,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=32} [2023-09-01 01:40:46,228 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-09-01 01:40:46,228 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 32 transitions, 124 flow [2023-09-01 01:40:46,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:40:46,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:40:46,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:40:46,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:40:46,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:40:46,437 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:40:46,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:40:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1294669698, now seen corresponding path program 1 times [2023-09-01 01:40:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:40:46,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760105108] [2023-09-01 01:40:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:40:46,440 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 01:40:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:40:46,441 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:40:46,449 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 (26)] Waiting until timeout for monitored process [2023-09-01 01:40:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:40:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 01:40:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:40:46,686 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 178 treesize of output 174 [2023-09-01 01:40:47,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 92 [2023-09-01 01:40:47,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:40:47,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 407 treesize of output 183 [2023-09-01 01:40:55,784 WARN L222 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 49 DAG size of output: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:41:01,833 WARN L222 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:41:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:41:03,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:41:05,412 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-09-01 01:41:05,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 540 treesize of output 256 [2023-09-01 01:41:05,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:41:05,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 87 [2023-09-01 01:41:05,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:41:05,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 73 [2023-09-01 01:46:00,053 WARN L222 SmtUtils]: Spent 4.81m on a formula simplification. DAG size of input: 285 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:46:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:46:00,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:46:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760105108] [2023-09-01 01:46:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760105108] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:00,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:00,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 01:46:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169666340] [2023-09-01 01:46:00,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 01:46:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:46:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 01:46:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=478, Unknown=4, NotChecked=0, Total=552 [2023-09-01 01:46:09,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:15,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:46:17,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 781 [2023-09-01 01:46:17,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 32 transitions, 124 flow. Second operand has 24 states, 24 states have (on average 231.91666666666666) internal successors, (5566), 24 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:17,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:17,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 781 [2023-09-01 01:46:17,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:58,819 WARN L222 SmtUtils]: Spent 1.64m on a formula simplification. DAG size of input: 107 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:48:03,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:48:08,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:48:15,049 INFO L130 PetriNetUnfolder]: 5694/8888 cut-off events. [2023-09-01 01:48:15,050 INFO L131 PetriNetUnfolder]: For 5023/5023 co-relation queries the response was YES. [2023-09-01 01:48:15,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24311 conditions, 8888 events. 5694/8888 cut-off events. For 5023/5023 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 54637 event pairs, 1331 based on Foata normal form. 3/8891 useless extension candidates. Maximal degree in co-relation 24292. Up to 3131 conditions per place. [2023-09-01 01:48:15,083 INFO L137 encePairwiseOnDemand]: 768/781 looper letters, 189 selfloop transitions, 39 changer transitions 7/235 dead transitions. [2023-09-01 01:48:15,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 235 transitions, 1255 flow [2023-09-01 01:48:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 01:48:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 01:48:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4570 transitions. [2023-09-01 01:48:15,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30797223532583057 [2023-09-01 01:48:15,089 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4570 transitions. [2023-09-01 01:48:15,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4570 transitions. [2023-09-01 01:48:15,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:15,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4570 transitions. [2023-09-01 01:48:15,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 240.52631578947367) internal successors, (4570), 19 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 01:48:15,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 781.0) internal successors, (15620), 20 states have internal predecessors, (15620), 0 states have call successors, (0), 0 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 01:48:15,108 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 781.0) internal successors, (15620), 20 states have internal predecessors, (15620), 0 states have call successors, (0), 0 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 01:48:15,108 INFO L175 Difference]: Start difference. First operand has 57 places, 32 transitions, 124 flow. Second operand 19 states and 4570 transitions. [2023-09-01 01:48:15,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 235 transitions, 1255 flow [2023-09-01 01:48:15,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 235 transitions, 1197 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-09-01 01:48:15,113 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 452 flow [2023-09-01 01:48:15,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=452, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-09-01 01:48:15,114 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 33 predicate places. [2023-09-01 01:48:15,114 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 452 flow [2023-09-01 01:48:15,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 231.91666666666666) internal successors, (5566), 24 states have internal predecessors, (5566), 0 states have call successors, (0), 0 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 01:48:15,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:15,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:15,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-09-01 01:48:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:48:15,319 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:48:15,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash -782062174, now seen corresponding path program 2 times [2023-09-01 01:48:15,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:48:15,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113144835] [2023-09-01 01:48:15,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:48:15,320 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 01:48:15,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:48:15,321 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:48:15,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 01:48:15,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:48:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:48:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 01:48:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:48:16,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:48:16,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 359 treesize of output 139 [2023-09-01 01:48:23,836 WARN L222 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 41 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:48:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:48:23,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:48:25,169 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-09-01 01:48:25,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 522 treesize of output 155 [2023-09-01 01:48:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:48:25,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:48:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113144835] [2023-09-01 01:48:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113144835] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:48:25,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:48:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:48:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517452917] [2023-09-01 01:48:25,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:48:25,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:48:25,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:48:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:48:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:48:30,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 781 [2023-09-01 01:48:30,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 452 flow. Second operand has 14 states, 14 states have (on average 293.7857142857143) internal successors, (4113), 14 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 01:48:30,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:30,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 781 [2023-09-01 01:48:30,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:49:00,085 WARN L222 SmtUtils]: Spent 20.28s on a formula simplification. DAG size of input: 76 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:49:13,347 WARN L222 SmtUtils]: Spent 12.22s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:49:18,359 INFO L130 PetriNetUnfolder]: 11590/18853 cut-off events. [2023-09-01 01:49:18,359 INFO L131 PetriNetUnfolder]: For 107616/107616 co-relation queries the response was YES. [2023-09-01 01:49:18,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88568 conditions, 18853 events. 11590/18853 cut-off events. For 107616/107616 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 140031 event pairs, 3301 based on Foata normal form. 40/18893 useless extension candidates. Maximal degree in co-relation 88536. Up to 7849 conditions per place. [2023-09-01 01:49:18,468 INFO L137 encePairwiseOnDemand]: 772/781 looper letters, 224 selfloop transitions, 77 changer transitions 115/416 dead transitions. [2023-09-01 01:49:18,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 416 transitions, 3339 flow [2023-09-01 01:49:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 01:49:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 01:49:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 8140 transitions. [2023-09-01 01:49:18,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38601982263954093 [2023-09-01 01:49:18,477 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 8140 transitions. [2023-09-01 01:49:18,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 8140 transitions. [2023-09-01 01:49:18,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:49:18,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 8140 transitions. [2023-09-01 01:49:18,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 301.48148148148147) internal successors, (8140), 27 states have internal predecessors, (8140), 0 states have call successors, (0), 0 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 01:49:18,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 781.0) internal successors, (21868), 28 states have internal predecessors, (21868), 0 states have call successors, (0), 0 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 01:49:18,504 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 781.0) internal successors, (21868), 28 states have internal predecessors, (21868), 0 states have call successors, (0), 0 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 01:49:18,505 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 452 flow. Second operand 27 states and 8140 transitions. [2023-09-01 01:49:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 416 transitions, 3339 flow [2023-09-01 01:49:18,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 416 transitions, 3220 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-09-01 01:49:18,727 INFO L231 Difference]: Finished difference. Result has 119 places, 135 transitions, 1145 flow [2023-09-01 01:49:18,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=781, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1145, PETRI_PLACES=119, PETRI_TRANSITIONS=135} [2023-09-01 01:49:18,728 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2023-09-01 01:49:18,728 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 135 transitions, 1145 flow [2023-09-01 01:49:18,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 293.7857142857143) internal successors, (4113), 14 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 01:49:18,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:49:18,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:49:18,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 01:49:18,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:49:18,941 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 01:49:18,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:49:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash 852014360, now seen corresponding path program 3 times [2023-09-01 01:49:18,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:49:18,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236763305] [2023-09-01 01:49:18,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:49:18,941 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 01:49:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:49:18,942 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:49:18,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 01:49:19,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:49:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:49:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 01:49:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:49:19,209 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 130 treesize of output 126 [2023-09-01 01:49:19,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 161 [2023-09-01 01:49:20,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:49:20,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 164 [2023-09-01 01:49:28,232 WARN L222 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:49:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:49:28,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:49:30,007 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-09-01 01:49:30,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 653 treesize of output 251 [2023-09-01 01:49:30,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:49:30,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 30 [2023-09-01 01:51:34,300 WARN L222 SmtUtils]: Spent 2.04m on a formula simplification. DAG size of input: 256 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:51:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:51:34,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:51:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236763305] [2023-09-01 01:51:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236763305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:51:34,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:51:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-09-01 01:51:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994347449] [2023-09-01 01:51:34,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:51:34,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 01:51:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:51:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 01:51:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=323, Unknown=1, NotChecked=0, Total=380 [2023-09-01 01:51:42,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 781 [2023-09-01 01:51:42,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 135 transitions, 1145 flow. Second operand has 20 states, 20 states have (on average 248.3) internal successors, (4966), 20 states have internal predecessors, (4966), 0 states have call successors, (0), 0 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 01:51:42,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:51:42,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 781 [2023-09-01 01:51:42,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:52:18,211 WARN L222 SmtUtils]: Spent 34.81s on a formula simplification. DAG size of input: 119 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:53:20,041 WARN L222 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 121 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15