./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.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/parallel-parallel-sum-2.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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --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 02:30:40,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:30:40,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:30:40,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:30:40,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:30:40,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:30:40,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:30:40,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:30:40,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:30:40,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:30:40,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:30:41,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:30:41,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:30:41,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:30:41,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:30:41,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:30:41,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:30:41,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:30:41,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:30:41,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:30:41,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:30:41,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:30:41,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:30:41,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:30:41,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:30:41,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:30:41,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:30:41,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:30:41,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:30:41,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:30:41,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:30:41,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:30:41,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:30:41,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:30:41,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:30:41,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:30:41,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:30:41,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:30:41,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:30:41,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:30:41,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:30:41,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:30:41,076 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:30:41,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:30:41,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:30:41,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:30:41,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:30:41,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:30:41,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:30:41,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:30:41,080 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:30:41,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:30:41,081 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:30:41,081 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:30:41,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:30:41,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:30:41,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:30:41,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:30:41,082 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:30:41,082 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:30:41,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:30:41,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:30:41,083 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:30:41,083 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:30:41,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:30:41,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:30:41,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:30:41,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:30:41,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:30:41,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:30:41,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:30:41,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:30:41,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:30:41,085 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:30:41,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:30:41,086 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:30:41,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:30:41,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:30:41,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:30:41,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:30:41,407 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:30:41,408 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:30:41,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-09-01 02:30:42,575 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:30:42,837 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:30:42,837 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-09-01 02:30:42,845 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4271369a/0097c8f94c7547bf9f162f89b216f8a6/FLAG61ff0a096 [2023-09-01 02:30:42,864 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4271369a/0097c8f94c7547bf9f162f89b216f8a6 [2023-09-01 02:30:42,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:30:42,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:30:42,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:42,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:30:42,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:30:42,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:42" (1/1) ... [2023-09-01 02:30:42,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c7bba54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:42, skipping insertion in model container [2023-09-01 02:30:42,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:42" (1/1) ... [2023-09-01 02:30:42,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:30:42,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:30:43,088 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-09-01 02:30:43,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:43,105 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 02:30:43,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59982dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:43, skipping insertion in model container [2023-09-01 02:30:43,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:43,107 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:30:43,108 INFO L158 Benchmark]: Toolchain (without parser) took 239.59ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 34.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:30:43,109 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 32.1MB in the beginning and 32.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:30:43,109 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.84ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 34.1MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:30:43,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 32.1MB in the beginning and 32.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.84ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 34.1MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 175]: 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/parallel-parallel-sum-2.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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --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 02:30:44,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:30:44,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:30:44,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:30:44,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:30:44,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:30:44,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:30:44,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:30:44,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:30:44,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:30:44,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:30:44,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:30:44,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:30:44,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:30:44,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:30:44,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:30:44,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:30:44,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:30:44,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:30:44,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:30:44,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:30:44,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:30:44,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:30:44,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:30:44,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:30:44,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:30:44,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:30:44,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:30:44,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:30:44,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:30:44,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:30:44,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:30:44,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:30:44,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:30:44,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:30:44,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:30:44,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:30:44,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:30:44,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:30:44,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:30:44,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:30:44,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:30:44,867 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:30:44,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:30:44,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:30:44,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:30:44,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:30:44,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:30:44,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:30:44,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:30:44,870 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:30:44,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:30:44,871 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:30:44,871 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:30:44,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:30:44,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:30:44,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:30:44,871 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:30:44,872 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:30:44,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:30:44,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:30:44,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:30:44,872 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:30:44,872 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:30:44,873 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:30:44,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:30:44,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:30:44,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:30:44,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:30:44,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:30:44,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:30:44,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:30:44,874 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:30:44,874 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:30:44,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:30:44,875 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:30:44,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:30:44,875 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:30:44,875 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:30:44,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:30:45,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:30:45,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:30:45,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:30:45,204 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:30:45,205 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:30:45,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-09-01 02:30:46,415 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:30:46,621 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:30:46,622 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-09-01 02:30:46,627 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9197687a0/6d9c6de36cec47479654219ee22e1aea/FLAGb15211c76 [2023-09-01 02:30:46,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9197687a0/6d9c6de36cec47479654219ee22e1aea [2023-09-01 02:30:46,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:30:46,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:30:46,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:46,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:30:46,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:30:46,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:46" (1/1) ... [2023-09-01 02:30:46,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1171989c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:46, skipping insertion in model container [2023-09-01 02:30:46,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:46" (1/1) ... [2023-09-01 02:30:46,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:30:46,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:30:46,859 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-09-01 02:30:46,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:46,900 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:30:46,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:30:46,942 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-09-01 02:30:46,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:46,960 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:30:47,004 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-09-01 02:30:47,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:47,023 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:30:47,023 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:30:47,029 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:30:47,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47 WrapperNode [2023-09-01 02:30:47,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:47,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:30:47,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:30:47,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:30:47,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,116 INFO L138 Inliner]: procedures = 31, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 384 [2023-09-01 02:30:47,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:30:47,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:30:47,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:30:47,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:30:47,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:30:47,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:30:47,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:30:47,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:30:47,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (1/1) ... [2023-09-01 02:30:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:30:47,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:30:47,231 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 02:30:47,244 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 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:30:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:30:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:30:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:30:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:30:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 02:30:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 02:30:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:30:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:30:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:30:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:30:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:30:47,267 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 02:30:47,447 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:30:47,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:30:48,091 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:30:48,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:30:48,284 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 02:30:48,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:30:48 BoogieIcfgContainer [2023-09-01 02:30:48,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:30:48,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:30:48,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:30:48,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:30:48,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:30:46" (1/3) ... [2023-09-01 02:30:48,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfa415b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:30:48, skipping insertion in model container [2023-09-01 02:30:48,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:47" (2/3) ... [2023-09-01 02:30:48,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfa415b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:30:48, skipping insertion in model container [2023-09-01 02:30:48,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:30:48" (3/3) ... [2023-09-01 02:30:48,295 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-09-01 02:30:48,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:30:48,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-09-01 02:30:48,311 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:30:48,469 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-09-01 02:30:48,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 339 transitions, 750 flow [2023-09-01 02:30:48,662 INFO L130 PetriNetUnfolder]: 21/291 cut-off events. [2023-09-01 02:30:48,662 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:30:48,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 291 events. 21/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 488 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2023-09-01 02:30:48,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 339 transitions, 750 flow [2023-09-01 02:30:48,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 287 transitions, 622 flow [2023-09-01 02:30:48,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:30:48,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 287 transitions, 622 flow [2023-09-01 02:30:48,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 287 transitions, 622 flow [2023-09-01 02:30:48,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 287 transitions, 622 flow [2023-09-01 02:30:48,737 INFO L130 PetriNetUnfolder]: 21/287 cut-off events. [2023-09-01 02:30:48,737 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:30:48,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 287 events. 21/287 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 483 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2023-09-01 02:30:48,748 INFO L119 LiptonReduction]: Number of co-enabled transitions 14104 [2023-09-01 02:31:10,068 INFO L134 LiptonReduction]: Checked pairs total: 54760 [2023-09-01 02:31:10,068 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-09-01 02:31:10,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:31:10,126 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;@50a59312, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:31:10,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-09-01 02:31:10,129 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:31:10,131 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:31:10,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:10,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:31:10,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:10,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash 48378, now seen corresponding path program 1 times [2023-09-01 02:31:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454366668] [2023-09-01 02:31:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:10,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:10,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:10,187 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 02:31:10,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:31:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:31:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:10,506 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:31:10,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:31:10,547 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 02:31:10,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:10,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:10,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454366668] [2023-09-01 02:31:10,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454366668] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:10,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761549093] [2023-09-01 02:31:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:10,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:10,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-09-01 02:31:10,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 02:31:10,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:10,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-09-01 02:31:10,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:25,716 INFO L130 PetriNetUnfolder]: 132970/172130 cut-off events. [2023-09-01 02:31:25,716 INFO L131 PetriNetUnfolder]: For 12616/12616 co-relation queries the response was YES. [2023-09-01 02:31:26,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346008 conditions, 172130 events. 132970/172130 cut-off events. For 12616/12616 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 986401 event pairs, 105827 based on Foata normal form. 0/58464 useless extension candidates. Maximal degree in co-relation 343421. Up to 160367 conditions per place. [2023-09-01 02:31:26,976 INFO L137 encePairwiseOnDemand]: 601/607 looper letters, 72 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-09-01 02:31:26,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 422 flow [2023-09-01 02:31:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-09-01 02:31:26,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942339373970346 [2023-09-01 02:31:26,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-09-01 02:31:26,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-09-01 02:31:26,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:26,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-09-01 02:31:27,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:27,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:27,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:27,012 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 240 flow. Second operand 3 states and 900 transitions. [2023-09-01 02:31:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 422 flow [2023-09-01 02:31:27,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 386 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 02:31:27,496 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 232 flow [2023-09-01 02:31:27,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-09-01 02:31:27,501 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-09-01 02:31:27,502 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 232 flow [2023-09-01 02:31:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 02:31:27,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:27,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:31:27,515 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 02:31:27,712 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 02:31:27,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:27,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 48377, now seen corresponding path program 1 times [2023-09-01 02:31:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:27,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193618970] [2023-09-01 02:31:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:27,714 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 02:31:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:27,716 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 02:31:27,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:31:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:31:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:27,827 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:31:27,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:31:27,838 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 02:31:27,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:27,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193618970] [2023-09-01 02:31:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193618970] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:27,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:27,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:27,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207238146] [2023-09-01 02:31:27,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:27,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:27,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:27,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-09-01 02:31:27,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 02:31:27,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:27,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-09-01 02:31:27,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:40,110 INFO L130 PetriNetUnfolder]: 129376/167015 cut-off events. [2023-09-01 02:31:40,111 INFO L131 PetriNetUnfolder]: For 2896/2896 co-relation queries the response was YES. [2023-09-01 02:31:40,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326152 conditions, 167015 events. 129376/167015 cut-off events. For 2896/2896 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 955800 event pairs, 99066 based on Foata normal form. 0/55804 useless extension candidates. Maximal degree in co-relation 323786. Up to 149066 conditions per place. [2023-09-01 02:31:41,030 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 99 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-09-01 02:31:41,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 533 flow [2023-09-01 02:31:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-09-01 02:31:41,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500823723228995 [2023-09-01 02:31:41,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-09-01 02:31:41,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-09-01 02:31:41,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:41,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-09-01 02:31:41,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 02:31:41,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:41,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:41,041 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 232 flow. Second operand 3 states and 912 transitions. [2023-09-01 02:31:41,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 533 flow [2023-09-01 02:31:41,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:41,045 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 243 flow [2023-09-01 02:31:41,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2023-09-01 02:31:41,046 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2023-09-01 02:31:41,047 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 243 flow [2023-09-01 02:31:41,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 02:31:41,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:41,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:31:41,060 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 02:31:41,256 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 02:31:41,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:41,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:41,257 INFO L85 PathProgramCache]: Analyzing trace with hash 48469, now seen corresponding path program 1 times [2023-09-01 02:31:41,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:41,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091498316] [2023-09-01 02:31:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:41,258 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 02:31:41,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:41,259 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 02:31:41,261 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 02:31:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:31:41,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:41,399 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 02:31:41,400 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 3 case distinctions, treesize of input 22 treesize of output 29 [2023-09-01 02:31:41,428 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 02:31:41,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:41,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091498316] [2023-09-01 02:31:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091498316] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:41,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:41,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011367750] [2023-09-01 02:31:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:41,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:41,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-09-01 02:31:41,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 02:31:41,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:41,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-09-01 02:31:41,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:50,643 INFO L130 PetriNetUnfolder]: 96720/125415 cut-off events. [2023-09-01 02:31:50,643 INFO L131 PetriNetUnfolder]: For 2685/2685 co-relation queries the response was YES. [2023-09-01 02:31:50,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245912 conditions, 125415 events. 96720/125415 cut-off events. For 2685/2685 co-relation queries the response was YES. Maximal size of possible extension queue 5018. Compared 702286 event pairs, 73008 based on Foata normal form. 0/44096 useless extension candidates. Maximal degree in co-relation 240389. Up to 110403 conditions per place. [2023-09-01 02:31:51,316 INFO L137 encePairwiseOnDemand]: 602/607 looper letters, 97 selfloop transitions, 3 changer transitions 0/138 dead transitions. [2023-09-01 02:31:51,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 534 flow [2023-09-01 02:31:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-09-01 02:31:51,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500274574409665 [2023-09-01 02:31:51,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-09-01 02:31:51,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-09-01 02:31:51,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:51,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-09-01 02:31:51,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 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 02:31:51,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:51,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:51,327 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 243 flow. Second operand 3 states and 911 transitions. [2023-09-01 02:31:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 534 flow [2023-09-01 02:31:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 531 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:51,335 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2023-09-01 02:31:51,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2023-09-01 02:31:51,336 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2023-09-01 02:31:51,336 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2023-09-01 02:31:51,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 02:31:51,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:51,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:31:51,348 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 02:31:51,545 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 02:31:51,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:51,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash 48468, now seen corresponding path program 1 times [2023-09-01 02:31:51,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:51,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735011531] [2023-09-01 02:31:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:51,546 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 02:31:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:51,547 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 02:31:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:31:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:31:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:51,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:51,685 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:31:51,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 02:31:51,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 02:31:51,741 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 02:31:51,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:51,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:51,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735011531] [2023-09-01 02:31:51,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735011531] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:51,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:51,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:51,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68470597] [2023-09-01 02:31:51,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:51,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:51,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:51,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-09-01 02:31:51,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 02:31:51,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:51,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-09-01 02:31:51,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:57,732 INFO L130 PetriNetUnfolder]: 63071/82538 cut-off events. [2023-09-01 02:31:57,732 INFO L131 PetriNetUnfolder]: For 2665/2665 co-relation queries the response was YES. [2023-09-01 02:31:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162417 conditions, 82538 events. 63071/82538 cut-off events. For 2665/2665 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 450562 event pairs, 49781 based on Foata normal form. 0/32294 useless extension candidates. Maximal degree in co-relation 158362. Up to 76835 conditions per place. [2023-09-01 02:31:58,113 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 57 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-09-01 02:31:58,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 361 flow [2023-09-01 02:31:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2023-09-01 02:31:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48929159802306427 [2023-09-01 02:31:58,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2023-09-01 02:31:58,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2023-09-01 02:31:58,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:58,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2023-09-01 02:31:58,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:58,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:58,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:31:58,123 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 891 transitions. [2023-09-01 02:31:58,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 361 flow [2023-09-01 02:31:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:31:58,132 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 241 flow [2023-09-01 02:31:58,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2023-09-01 02:31:58,133 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-09-01 02:31:58,133 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 241 flow [2023-09-01 02:31:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 02:31:58,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:58,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:31:58,143 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 (5)] Ended with exit code 0 [2023-09-01 02:31:58,340 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 02:31:58,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:58,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1502991, now seen corresponding path program 1 times [2023-09-01 02:31:58,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:58,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037156102] [2023-09-01 02:31:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:58,342 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 02:31:58,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:58,343 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 02:31:58,345 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 02:31:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:31:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:58,467 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:31:58,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:31:58,526 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 02:31:58,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:31:58,700 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 02:31:58,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037156102] [2023-09-01 02:31:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037156102] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:31:58,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:31:58,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:31:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117725590] [2023-09-01 02:31:58,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:31:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:31:58,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:31:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:31:59,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 607 [2023-09-01 02:31:59,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 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 02:31:59,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:59,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 607 [2023-09-01 02:31:59,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:06,291 INFO L130 PetriNetUnfolder]: 64778/84987 cut-off events. [2023-09-01 02:32:06,292 INFO L131 PetriNetUnfolder]: For 2394/2394 co-relation queries the response was YES. [2023-09-01 02:32:06,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167185 conditions, 84987 events. 64778/84987 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 463977 event pairs, 50654 based on Foata normal form. 0/33788 useless extension candidates. Maximal degree in co-relation 167174. Up to 79037 conditions per place. [2023-09-01 02:32:06,715 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 76 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2023-09-01 02:32:06,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 509 flow [2023-09-01 02:32:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:32:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:32:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1708 transitions. [2023-09-01 02:32:06,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46897309170785284 [2023-09-01 02:32:06,721 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1708 transitions. [2023-09-01 02:32:06,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1708 transitions. [2023-09-01 02:32:06,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:06,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1708 transitions. [2023-09-01 02:32:06,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 02:32:06,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 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 02:32:06,733 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 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 02:32:06,734 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 241 flow. Second operand 6 states and 1708 transitions. [2023-09-01 02:32:06,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 509 flow [2023-09-01 02:32:06,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 125 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:32:06,740 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 368 flow [2023-09-01 02:32:06,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2023-09-01 02:32:06,741 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2023-09-01 02:32:06,741 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 368 flow [2023-09-01 02:32:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 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 02:32:06,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:06,742 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:32:06,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:32:06,950 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 02:32:06,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:06,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1829182010, now seen corresponding path program 2 times [2023-09-01 02:32:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:06,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852950146] [2023-09-01 02:32:06,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:32:06,952 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 02:32:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:06,953 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 02:32:06,955 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 02:32:07,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:32:07,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:32:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:32:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:07,107 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:32:07,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:32:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:07,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:32:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:07,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852950146] [2023-09-01 02:32:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852950146] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:32:07,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:32:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:32:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009248896] [2023-09-01 02:32:07,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:32:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:32:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:32:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:32:11,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-09-01 02:32:11,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 271.0) internal successors, (3252), 12 states have internal predecessors, (3252), 0 states have call successors, (0), 0 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 02:32:11,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:11,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-09-01 02:32:11,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:21,731 INFO L130 PetriNetUnfolder]: 64827/85125 cut-off events. [2023-09-01 02:32:21,732 INFO L131 PetriNetUnfolder]: For 3701/3701 co-relation queries the response was YES. [2023-09-01 02:32:21,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168344 conditions, 85125 events. 64827/85125 cut-off events. For 3701/3701 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 465065 event pairs, 44016 based on Foata normal form. 6/33910 useless extension candidates. Maximal degree in co-relation 168328. Up to 79065 conditions per place. [2023-09-01 02:32:22,245 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 114 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2023-09-01 02:32:22,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 186 transitions, 1003 flow [2023-09-01 02:32:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:32:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:32:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3938 transitions. [2023-09-01 02:32:22,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634031536832196 [2023-09-01 02:32:22,258 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3938 transitions. [2023-09-01 02:32:22,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3938 transitions. [2023-09-01 02:32:22,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:22,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3938 transitions. [2023-09-01 02:32:22,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 281.2857142857143) internal successors, (3938), 14 states have internal predecessors, (3938), 0 states have call successors, (0), 0 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 02:32:22,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 0 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 02:32:22,280 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 0 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 02:32:22,281 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 368 flow. Second operand 14 states and 3938 transitions. [2023-09-01 02:32:22,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 186 transitions, 1003 flow [2023-09-01 02:32:22,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 186 transitions, 953 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-09-01 02:32:22,292 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 654 flow [2023-09-01 02:32:22,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=654, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2023-09-01 02:32:22,295 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-09-01 02:32:22,295 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 654 flow [2023-09-01 02:32:22,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 271.0) internal successors, (3252), 12 states have internal predecessors, (3252), 0 states have call successors, (0), 0 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 02:32:22,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:22,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:32:22,311 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 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:32:22,506 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 02:32:22,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:22,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1847298388, now seen corresponding path program 1 times [2023-09-01 02:32:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730080561] [2023-09-01 02:32:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:22,507 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 02:32:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:22,508 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 02:32:22,514 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 (8)] Waiting until timeout for monitored process [2023-09-01 02:32:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 02:32:22,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:22,640 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 02:32:22,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-09-01 02:32:22,666 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 02:32:22,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:22,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730080561] [2023-09-01 02:32:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730080561] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:22,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:32:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985958417] [2023-09-01 02:32:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:22,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:22,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 607 [2023-09-01 02:32:22,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 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 02:32:22,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:22,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 607 [2023-09-01 02:32:22,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:29,581 INFO L130 PetriNetUnfolder]: 65465/86111 cut-off events. [2023-09-01 02:32:29,582 INFO L131 PetriNetUnfolder]: For 2455/2457 co-relation queries the response was YES. [2023-09-01 02:32:29,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169440 conditions, 86111 events. 65465/86111 cut-off events. For 2455/2457 co-relation queries the response was YES. Maximal size of possible extension queue 3414. Compared 472393 event pairs, 48560 based on Foata normal form. 1/34109 useless extension candidates. Maximal degree in co-relation 169415. Up to 75070 conditions per place. [2023-09-01 02:32:30,186 INFO L137 encePairwiseOnDemand]: 598/607 looper letters, 113 selfloop transitions, 8 changer transitions 0/183 dead transitions. [2023-09-01 02:32:30,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 1013 flow [2023-09-01 02:32:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-09-01 02:32:30,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.499725425590335 [2023-09-01 02:32:30,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-09-01 02:32:30,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-09-01 02:32:30,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:30,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-09-01 02:32:30,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:30,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:30,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:30,195 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 654 flow. Second operand 3 states and 910 transitions. [2023-09-01 02:32:30,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 1013 flow [2023-09-01 02:32:30,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 183 transitions, 981 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:30,203 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 680 flow [2023-09-01 02:32:30,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=680, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2023-09-01 02:32:30,204 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 20 predicate places. [2023-09-01 02:32:30,204 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 680 flow [2023-09-01 02:32:30,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 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 02:32:30,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:30,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:32:30,216 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 (8)] Ended with exit code 0 [2023-09-01 02:32:30,413 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 02:32:30,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:30,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:30,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1847298389, now seen corresponding path program 1 times [2023-09-01 02:32:30,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:30,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714177120] [2023-09-01 02:32:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:30,415 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 02:32:30,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:30,415 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 02:32:30,418 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 02:32:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:30,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:32:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:30,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:32:30,524 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-09-01 02:32:30,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-09-01 02:32:30,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-09-01 02:32:30,562 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 02:32:30,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:30,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714177120] [2023-09-01 02:32:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714177120] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:30,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:30,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:32:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055826514] [2023-09-01 02:32:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:30,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-09-01 02:32:30,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 680 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 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 02:32:30,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:30,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-09-01 02:32:30,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:37,350 INFO L130 PetriNetUnfolder]: 64841/85226 cut-off events. [2023-09-01 02:32:37,350 INFO L131 PetriNetUnfolder]: For 5216/5222 co-relation queries the response was YES. [2023-09-01 02:32:37,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169617 conditions, 85226 events. 64841/85226 cut-off events. For 5216/5222 co-relation queries the response was YES. Maximal size of possible extension queue 3413. Compared 468250 event pairs, 50886 based on Foata normal form. 248/34137 useless extension candidates. Maximal degree in co-relation 169589. Up to 79263 conditions per place. [2023-09-01 02:32:38,024 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 72 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2023-09-01 02:32:38,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 822 flow [2023-09-01 02:32:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2023-09-01 02:32:38,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887424492037342 [2023-09-01 02:32:38,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2023-09-01 02:32:38,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2023-09-01 02:32:38,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:38,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2023-09-01 02:32:38,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 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 02:32:38,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:38,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:38,031 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 680 flow. Second operand 3 states and 890 transitions. [2023-09-01 02:32:38,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 822 flow [2023-09-01 02:32:38,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 806 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:38,050 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 662 flow [2023-09-01 02:32:38,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=662, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2023-09-01 02:32:38,051 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-09-01 02:32:38,051 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 662 flow [2023-09-01 02:32:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 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 02:32:38,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:38,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:38,071 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 02:32:38,261 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 02:32:38,262 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:38,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1170462127, now seen corresponding path program 1 times [2023-09-01 02:32:38,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:38,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554551631] [2023-09-01 02:32:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:38,263 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 02:32:38,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:38,264 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 02:32:38,266 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 02:32:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:32:38,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:38,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:32:38,364 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:32:38,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:32:38,372 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 02:32:38,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:38,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554551631] [2023-09-01 02:32:38,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554551631] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:38,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:38,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:32:38,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503784298] [2023-09-01 02:32:38,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:38,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:38,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:38,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-09-01 02:32:38,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 662 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 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 02:32:38,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:38,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-09-01 02:32:38,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:44,346 INFO L130 PetriNetUnfolder]: 53592/71286 cut-off events. [2023-09-01 02:32:44,346 INFO L131 PetriNetUnfolder]: For 5236/5240 co-relation queries the response was YES. [2023-09-01 02:32:44,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142570 conditions, 71286 events. 53592/71286 cut-off events. For 5236/5240 co-relation queries the response was YES. Maximal size of possible extension queue 2576. Compared 391924 event pairs, 35084 based on Foata normal form. 0/30194 useless extension candidates. Maximal degree in co-relation 142542. Up to 58421 conditions per place. [2023-09-01 02:32:44,854 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 112 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2023-09-01 02:32:44,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 180 transitions, 1034 flow [2023-09-01 02:32:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-09-01 02:32:44,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975288303130148 [2023-09-01 02:32:44,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-09-01 02:32:44,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-09-01 02:32:44,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:44,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-09-01 02:32:44,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:44,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:44,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:44,862 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 662 flow. Second operand 3 states and 906 transitions. [2023-09-01 02:32:44,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 180 transitions, 1034 flow [2023-09-01 02:32:44,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 180 transitions, 1033 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:32:44,872 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 770 flow [2023-09-01 02:32:44,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=770, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2023-09-01 02:32:44,873 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 21 predicate places. [2023-09-01 02:32:44,873 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 770 flow [2023-09-01 02:32:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 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 02:32:44,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:44,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:44,888 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 02:32:45,088 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 02:32:45,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:45,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1170462128, now seen corresponding path program 1 times [2023-09-01 02:32:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61271096] [2023-09-01 02:32:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:45,089 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 02:32:45,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:45,090 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 02:32:45,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:32:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:32:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:45,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 02:32:45,200 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 02:32:45,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:32:45,215 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 02:32:45,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:45,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:45,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61271096] [2023-09-01 02:32:45,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61271096] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:45,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:45,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:32:45,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816442853] [2023-09-01 02:32:45,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:45,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:45,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:45,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 607 [2023-09-01 02:32:45,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 770 flow. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 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 02:32:45,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:45,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 607 [2023-09-01 02:32:45,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:49,675 INFO L130 PetriNetUnfolder]: 39663/53555 cut-off events. [2023-09-01 02:32:49,676 INFO L131 PetriNetUnfolder]: For 11848/11848 co-relation queries the response was YES. [2023-09-01 02:32:49,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112133 conditions, 53555 events. 39663/53555 cut-off events. For 11848/11848 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 293806 event pairs, 29791 based on Foata normal form. 2922/27474 useless extension candidates. Maximal degree in co-relation 112104. Up to 45471 conditions per place. [2023-09-01 02:32:50,315 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 99 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-09-01 02:32:50,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 165 transitions, 1065 flow [2023-09-01 02:32:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-09-01 02:32:50,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035694673256452 [2023-09-01 02:32:50,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-09-01 02:32:50,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-09-01 02:32:50,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:50,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-09-01 02:32:50,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 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 02:32:50,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:50,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:32:50,323 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 770 flow. Second operand 3 states and 917 transitions. [2023-09-01 02:32:50,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 165 transitions, 1065 flow [2023-09-01 02:32:50,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1027 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:50,341 INFO L231 Difference]: Finished difference. Result has 125 places, 140 transitions, 758 flow [2023-09-01 02:32:50,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=758, PETRI_PLACES=125, PETRI_TRANSITIONS=140} [2023-09-01 02:32:50,341 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 19 predicate places. [2023-09-01 02:32:50,342 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 140 transitions, 758 flow [2023-09-01 02:32:50,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 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 02:32:50,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:50,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:50,350 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 02:32:50,544 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 02:32:50,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:50,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash -467289919, now seen corresponding path program 1 times [2023-09-01 02:32:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:50,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829884873] [2023-09-01 02:32:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:50,545 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 02:32:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:50,546 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 02:32:50,549 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 02:32:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:32:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:50,778 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 02:32:50,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:50,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:50,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829884873] [2023-09-01 02:32:50,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829884873] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:50,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:50,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:32:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69087941] [2023-09-01 02:32:50,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:50,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:32:50,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:32:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:32:50,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-09-01 02:32:50,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 140 transitions, 758 flow. Second operand has 4 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:50,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:50,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-09-01 02:32:50,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:56,622 INFO L130 PetriNetUnfolder]: 49896/67216 cut-off events. [2023-09-01 02:32:56,622 INFO L131 PetriNetUnfolder]: For 10959/10966 co-relation queries the response was YES. [2023-09-01 02:32:56,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139796 conditions, 67216 events. 49896/67216 cut-off events. For 10959/10966 co-relation queries the response was YES. Maximal size of possible extension queue 2087. Compared 378566 event pairs, 38655 based on Foata normal form. 122/32321 useless extension candidates. Maximal degree in co-relation 139767. Up to 48823 conditions per place. [2023-09-01 02:32:57,134 INFO L137 encePairwiseOnDemand]: 597/607 looper letters, 113 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2023-09-01 02:32:57,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 180 transitions, 1118 flow [2023-09-01 02:32:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:32:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:32:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1210 transitions. [2023-09-01 02:32:57,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49835255354200986 [2023-09-01 02:32:57,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1210 transitions. [2023-09-01 02:32:57,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1210 transitions. [2023-09-01 02:32:57,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:57,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1210 transitions. [2023-09-01 02:32:57,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 302.5) internal successors, (1210), 4 states have internal predecessors, (1210), 0 states have call successors, (0), 0 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 02:32:57,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 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 02:32:57,141 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 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 02:32:57,142 INFO L175 Difference]: Start difference. First operand has 125 places, 140 transitions, 758 flow. Second operand 4 states and 1210 transitions. [2023-09-01 02:32:57,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 180 transitions, 1118 flow [2023-09-01 02:32:57,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 180 transitions, 1088 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:57,155 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 764 flow [2023-09-01 02:32:57,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=764, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2023-09-01 02:32:57,155 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 22 predicate places. [2023-09-01 02:32:57,155 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 764 flow [2023-09-01 02:32:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:57,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:57,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:57,169 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 02:32:57,365 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 02:32:57,365 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:57,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash -175700522, now seen corresponding path program 1 times [2023-09-01 02:32:57,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:57,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407695700] [2023-09-01 02:32:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:57,366 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 02:32:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:57,367 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 02:32:57,368 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 02:32:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:32:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:57,637 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 02:32:57,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:32:57,740 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 02:32:57,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407695700] [2023-09-01 02:32:57,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407695700] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:32:57,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:32:57,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:32:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522678267] [2023-09-01 02:32:57,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:32:57,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:32:57,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:32:57,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:32:58,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-09-01 02:32:58,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 275.5) internal successors, (2204), 8 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 02:32:58,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:58,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-09-01 02:32:58,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:06,050 INFO L130 PetriNetUnfolder]: 64257/87523 cut-off events. [2023-09-01 02:33:06,050 INFO L131 PetriNetUnfolder]: For 18900/18909 co-relation queries the response was YES. [2023-09-01 02:33:06,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192278 conditions, 87523 events. 64257/87523 cut-off events. For 18900/18909 co-relation queries the response was YES. Maximal size of possible extension queue 2402. Compared 520945 event pairs, 48344 based on Foata normal form. 1894/48764 useless extension candidates. Maximal degree in co-relation 192246. Up to 43781 conditions per place. [2023-09-01 02:33:06,779 INFO L137 encePairwiseOnDemand]: 596/607 looper letters, 180 selfloop transitions, 13 changer transitions 0/257 dead transitions. [2023-09-01 02:33:06,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 257 transitions, 1532 flow [2023-09-01 02:33:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:33:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:33:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2632 transitions. [2023-09-01 02:33:06,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48178656415888704 [2023-09-01 02:33:06,783 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2632 transitions. [2023-09-01 02:33:06,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2632 transitions. [2023-09-01 02:33:06,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:06,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2632 transitions. [2023-09-01 02:33:06,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 292.44444444444446) internal successors, (2632), 9 states have internal predecessors, (2632), 0 states have call successors, (0), 0 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 02:33:06,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 0 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 02:33:06,792 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 0 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 02:33:06,792 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 764 flow. Second operand 9 states and 2632 transitions. [2023-09-01 02:33:06,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 257 transitions, 1532 flow [2023-09-01 02:33:06,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 257 transitions, 1524 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 02:33:06,814 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 843 flow [2023-09-01 02:33:06,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=843, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2023-09-01 02:33:06,815 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 31 predicate places. [2023-09-01 02:33:06,815 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 843 flow [2023-09-01 02:33:06,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 275.5) internal successors, (2204), 8 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 02:33:06,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:06,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:06,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 02:33:07,029 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 02:33:07,029 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:07,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:07,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1905922592, now seen corresponding path program 1 times [2023-09-01 02:33:07,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:07,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036760418] [2023-09-01 02:33:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:07,030 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 02:33:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:07,031 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 02:33:07,032 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 02:33:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:33:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:07,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 02:33:07,152 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 02:33:07,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:33:07,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036760418] [2023-09-01 02:33:07,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036760418] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:07,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:07,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:33:07,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690537539] [2023-09-01 02:33:07,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:07,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:33:07,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:33:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:33:07,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 607 [2023-09-01 02:33:07,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 843 flow. Second operand has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 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 02:33:07,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:07,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 607 [2023-09-01 02:33:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:15,046 INFO L130 PetriNetUnfolder]: 65047/88660 cut-off events. [2023-09-01 02:33:15,046 INFO L131 PetriNetUnfolder]: For 27175/27189 co-relation queries the response was YES. [2023-09-01 02:33:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206257 conditions, 88660 events. 65047/88660 cut-off events. For 27175/27189 co-relation queries the response was YES. Maximal size of possible extension queue 2345. Compared 528657 event pairs, 49577 based on Foata normal form. 2701/50664 useless extension candidates. Maximal degree in co-relation 206222. Up to 72517 conditions per place. [2023-09-01 02:33:15,828 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 106 selfloop transitions, 5 changer transitions 0/170 dead transitions. [2023-09-01 02:33:15,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 170 transitions, 1147 flow [2023-09-01 02:33:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:33:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:33:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-09-01 02:33:15,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035694673256452 [2023-09-01 02:33:15,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-09-01 02:33:15,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-09-01 02:33:15,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:15,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-09-01 02:33:15,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 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 02:33:15,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:33:15,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:33:15,833 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 843 flow. Second operand 3 states and 917 transitions. [2023-09-01 02:33:15,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 170 transitions, 1147 flow [2023-09-01 02:33:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 170 transitions, 1125 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 02:33:15,867 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 827 flow [2023-09-01 02:33:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=827, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2023-09-01 02:33:15,868 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 28 predicate places. [2023-09-01 02:33:15,868 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 827 flow [2023-09-01 02:33:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 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 02:33:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:15,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:15,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 02:33:16,078 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 02:33:16,078 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:16,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1905922591, now seen corresponding path program 1 times [2023-09-01 02:33:16,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:16,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129967051] [2023-09-01 02:33:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:16,080 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 02:33:16,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:16,081 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 02:33:16,082 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 02:33:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:33:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:16,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:33:16,188 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 02:33:16,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:33:16,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:16,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129967051] [2023-09-01 02:33:16,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129967051] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:16,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:16,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:33:16,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674078343] [2023-09-01 02:33:16,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:16,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:33:16,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:33:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:33:16,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-09-01 02:33:16,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 827 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 02:33:16,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:16,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-09-01 02:33:16,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:25,016 INFO L130 PetriNetUnfolder]: 77023/105269 cut-off events. [2023-09-01 02:33:25,017 INFO L131 PetriNetUnfolder]: For 34559/34581 co-relation queries the response was YES. [2023-09-01 02:33:25,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244777 conditions, 105269 events. 77023/105269 cut-off events. For 34559/34581 co-relation queries the response was YES. Maximal size of possible extension queue 2663. Compared 645724 event pairs, 50102 based on Foata normal form. 9/58771 useless extension candidates. Maximal degree in co-relation 244744. Up to 80058 conditions per place. [2023-09-01 02:33:26,097 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 120 selfloop transitions, 14 changer transitions 0/189 dead transitions. [2023-09-01 02:33:26,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 189 transitions, 1262 flow [2023-09-01 02:33:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:33:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:33:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-09-01 02:33:26,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986271279516749 [2023-09-01 02:33:26,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-09-01 02:33:26,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-09-01 02:33:26,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:26,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-09-01 02:33:26,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 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 02:33:26,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:33:26,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 02:33:26,104 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 827 flow. Second operand 3 states and 908 transitions. [2023-09-01 02:33:26,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 189 transitions, 1262 flow [2023-09-01 02:33:26,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:33:26,191 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 937 flow [2023-09-01 02:33:26,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=937, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2023-09-01 02:33:26,193 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 30 predicate places. [2023-09-01 02:33:26,193 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 937 flow [2023-09-01 02:33:26,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 02:33:26,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:26,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:26,205 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 02:33:26,403 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 02:33:26,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:26,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash 273636192, now seen corresponding path program 1 times [2023-09-01 02:33:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:26,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854528897] [2023-09-01 02:33:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:26,404 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 02:33:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:26,406 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 02:33:26,408 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 02:33:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:33:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:26,579 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:33:26,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:33:26,625 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:33:26,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:33:26,647 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:33:26,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:33:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:33:26,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:33:26,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:26,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854528897] [2023-09-01 02:33:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854528897] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:33:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756837741] [2023-09-01 02:33:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:26,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:33:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:33:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:33:26,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-09-01 02:33:26,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 937 flow. Second operand has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 02:33:26,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:26,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-09-01 02:33:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:32,484 INFO L130 PetriNetUnfolder]: 45092/64243 cut-off events. [2023-09-01 02:33:32,484 INFO L131 PetriNetUnfolder]: For 33957/33962 co-relation queries the response was YES. [2023-09-01 02:33:32,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153720 conditions, 64243 events. 45092/64243 cut-off events. For 33957/33962 co-relation queries the response was YES. Maximal size of possible extension queue 1755. Compared 403512 event pairs, 22390 based on Foata normal form. 0/39007 useless extension candidates. Maximal degree in co-relation 153686. Up to 31405 conditions per place. [2023-09-01 02:33:33,164 INFO L137 encePairwiseOnDemand]: 593/607 looper letters, 139 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-09-01 02:33:33,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 230 transitions, 1578 flow [2023-09-01 02:33:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:33:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:33:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2023-09-01 02:33:33,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485667215815486 [2023-09-01 02:33:33,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2023-09-01 02:33:33,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2023-09-01 02:33:33,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:33,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2023-09-01 02:33:33,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 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 02:33:33,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 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 02:33:33,172 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 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 02:33:33,172 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 937 flow. Second operand 5 states and 1474 transitions. [2023-09-01 02:33:33,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 230 transitions, 1578 flow [2023-09-01 02:33:33,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 230 transitions, 1542 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:33:33,210 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1163 flow [2023-09-01 02:33:33,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1163, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2023-09-01 02:33:33,211 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 35 predicate places. [2023-09-01 02:33:33,211 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1163 flow [2023-09-01 02:33:33,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 02:33:33,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:33,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:33,225 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 02:33:33,421 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 02:33:33,421 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:33,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash 273636193, now seen corresponding path program 2 times [2023-09-01 02:33:33,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103605488] [2023-09-01 02:33:33,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:33:33,423 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 02:33:33,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:33,423 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 02:33:33,424 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 02:33:33,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:33:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:33:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 02:33:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:33,617 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-09-01 02:33:33,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2023-09-01 02:33:33,675 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:33:33,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:33:33,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:33:33,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 02:33:33,907 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:33:33,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:33:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:33:33,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 02:33:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:33:34,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:33:34,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:34,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103605488] [2023-09-01 02:33:34,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103605488] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:34,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:34,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:33:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849772449] [2023-09-01 02:33:34,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:34,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:33:34,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:33:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:33:35,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 607 [2023-09-01 02:33:35,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1163 flow. Second operand has 6 states, 6 states have (on average 260.3333333333333) internal successors, (1562), 6 states have internal predecessors, (1562), 0 states have call successors, (0), 0 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 02:33:35,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:35,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 607 [2023-09-01 02:33:35,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:44,499 INFO L130 PetriNetUnfolder]: 60539/84592 cut-off events. [2023-09-01 02:33:44,500 INFO L131 PetriNetUnfolder]: For 89707/90009 co-relation queries the response was YES. [2023-09-01 02:33:44,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230260 conditions, 84592 events. 60539/84592 cut-off events. For 89707/90009 co-relation queries the response was YES. Maximal size of possible extension queue 2234. Compared 530552 event pairs, 20680 based on Foata normal form. 1404/65923 useless extension candidates. Maximal degree in co-relation 230222. Up to 24701 conditions per place. [2023-09-01 02:33:45,263 INFO L137 encePairwiseOnDemand]: 592/607 looper letters, 243 selfloop transitions, 46 changer transitions 0/321 dead transitions. [2023-09-01 02:33:45,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 321 transitions, 2413 flow [2023-09-01 02:33:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:33:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:33:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2021 transitions. [2023-09-01 02:33:45,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47564132737114617 [2023-09-01 02:33:45,268 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2021 transitions. [2023-09-01 02:33:45,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2021 transitions. [2023-09-01 02:33:45,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:45,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2021 transitions. [2023-09-01 02:33:45,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 288.7142857142857) internal successors, (2021), 7 states have internal predecessors, (2021), 0 states have call successors, (0), 0 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 02:33:45,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 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 02:33:45,276 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 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 02:33:45,276 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1163 flow. Second operand 7 states and 2021 transitions. [2023-09-01 02:33:45,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 321 transitions, 2413 flow [2023-09-01 02:33:45,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 321 transitions, 2384 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 02:33:45,356 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 1445 flow [2023-09-01 02:33:45,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1445, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2023-09-01 02:33:45,357 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 42 predicate places. [2023-09-01 02:33:45,357 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 1445 flow [2023-09-01 02:33:45,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.3333333333333) internal successors, (1562), 6 states have internal predecessors, (1562), 0 states have call successors, (0), 0 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 02:33:45,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:45,358 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:33:45,370 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 (17)] Ended with exit code 0 [2023-09-01 02:33:45,567 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 02:33:45,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:45,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 893811226, now seen corresponding path program 3 times [2023-09-01 02:33:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:45,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833197070] [2023-09-01 02:33:45,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:33:45,568 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 02:33:45,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:45,570 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 02:33:45,570 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 02:33:45,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:33:45,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:33:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:33:45,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:45,785 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:33:45,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:33:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:46,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:33:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:47,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833197070] [2023-09-01 02:33:47,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833197070] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:33:47,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:33:47,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:33:47,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307638401] [2023-09-01 02:33:47,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:33:47,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:33:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:33:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:34:04,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-09-01 02:34:04,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 1445 flow. Second operand has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 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 02:34:04,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:04,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-09-01 02:34:04,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:33,595 INFO L130 PetriNetUnfolder]: 60608/85908 cut-off events. [2023-09-01 02:34:33,595 INFO L131 PetriNetUnfolder]: For 151209/151327 co-relation queries the response was YES. [2023-09-01 02:34:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248873 conditions, 85908 events. 60608/85908 cut-off events. For 151209/151327 co-relation queries the response was YES. Maximal size of possible extension queue 2208. Compared 555893 event pairs, 41564 based on Foata normal form. 12/65124 useless extension candidates. Maximal degree in co-relation 248832. Up to 78979 conditions per place. [2023-09-01 02:34:34,415 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 217 selfloop transitions, 80 changer transitions 0/329 dead transitions. [2023-09-01 02:34:34,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 329 transitions, 3013 flow [2023-09-01 02:34:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 02:34:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 02:34:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7278 transitions. [2023-09-01 02:34:34,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46115828158661765 [2023-09-01 02:34:34,426 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7278 transitions. [2023-09-01 02:34:34,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7278 transitions. [2023-09-01 02:34:34,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:34,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7278 transitions. [2023-09-01 02:34:34,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 279.9230769230769) internal successors, (7278), 26 states have internal predecessors, (7278), 0 states have call successors, (0), 0 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 02:34:34,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 607.0) internal successors, (16389), 27 states have internal predecessors, (16389), 0 states have call successors, (0), 0 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 02:34:34,449 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 607.0) internal successors, (16389), 27 states have internal predecessors, (16389), 0 states have call successors, (0), 0 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 02:34:34,449 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 1445 flow. Second operand 26 states and 7278 transitions. [2023-09-01 02:34:34,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 329 transitions, 3013 flow [2023-09-01 02:34:35,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 329 transitions, 3006 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:34:35,022 INFO L231 Difference]: Finished difference. Result has 186 places, 220 transitions, 2229 flow [2023-09-01 02:34:35,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2229, PETRI_PLACES=186, PETRI_TRANSITIONS=220} [2023-09-01 02:34:35,023 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 80 predicate places. [2023-09-01 02:34:35,023 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 220 transitions, 2229 flow [2023-09-01 02:34:35,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 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 02:34:35,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:35,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:35,037 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 02:34:35,234 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 02:34:35,235 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:34:35,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389204, now seen corresponding path program 1 times [2023-09-01 02:34:35,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:34:35,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714778036] [2023-09-01 02:34:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:35,235 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 02:34:35,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:34:35,237 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 02:34:35,238 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 02:34:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:34:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:34:35,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:34:35,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 02:34:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:34:35,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:34:35,398 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:34:35,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:34:35,412 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 02:34:35,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:34:35,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:34:35,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714778036] [2023-09-01 02:34:35,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714778036] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:35,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:35,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:34:35,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495678] [2023-09-01 02:34:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:35,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:34:35,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:34:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:34:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:34:35,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 607 [2023-09-01 02:34:35,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 220 transitions, 2229 flow. Second operand has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:35,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:35,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 607 [2023-09-01 02:34:35,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:43,521 INFO L130 PetriNetUnfolder]: 46156/70087 cut-off events. [2023-09-01 02:34:43,521 INFO L131 PetriNetUnfolder]: For 125540/125666 co-relation queries the response was YES. [2023-09-01 02:34:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202768 conditions, 70087 events. 46156/70087 cut-off events. For 125540/125666 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 508806 event pairs, 13866 based on Foata normal form. 6/56076 useless extension candidates. Maximal degree in co-relation 202712. Up to 37512 conditions per place. [2023-09-01 02:34:44,592 INFO L137 encePairwiseOnDemand]: 597/607 looper letters, 164 selfloop transitions, 53 changer transitions 0/280 dead transitions. [2023-09-01 02:34:44,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 280 transitions, 3040 flow [2023-09-01 02:34:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:34:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:34:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1166 transitions. [2023-09-01 02:34:44,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802306425041186 [2023-09-01 02:34:44,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1166 transitions. [2023-09-01 02:34:44,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1166 transitions. [2023-09-01 02:34:44,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:44,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1166 transitions. [2023-09-01 02:34:44,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 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 02:34:44,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 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 02:34:44,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 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 02:34:44,598 INFO L175 Difference]: Start difference. First operand has 186 places, 220 transitions, 2229 flow. Second operand 4 states and 1166 transitions. [2023-09-01 02:34:44,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 280 transitions, 3040 flow [2023-09-01 02:34:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 280 transitions, 2952 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-09-01 02:34:45,053 INFO L231 Difference]: Finished difference. Result has 179 places, 233 transitions, 2492 flow [2023-09-01 02:34:45,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2492, PETRI_PLACES=179, PETRI_TRANSITIONS=233} [2023-09-01 02:34:45,054 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 73 predicate places. [2023-09-01 02:34:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 233 transitions, 2492 flow [2023-09-01 02:34:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:45,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:45,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:34:45,063 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 02:34:45,255 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 02:34:45,255 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:34:45,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:45,255 INFO L85 PathProgramCache]: Analyzing trace with hash -107211231, now seen corresponding path program 1 times [2023-09-01 02:34:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:34:45,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62181566] [2023-09-01 02:34:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:45,256 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 02:34:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:34:45,257 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 02:34:45,258 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 02:34:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:34:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:34:45,425 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:34:45,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:34:45,494 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 13 treesize of output 9 [2023-09-01 02:34:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:45,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:34:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:45,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:34:45,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62181566] [2023-09-01 02:34:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62181566] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:34:45,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:34:45,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:34:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17839028] [2023-09-01 02:34:45,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:34:45,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:34:45,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:34:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:34:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:34:48,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 607 [2023-09-01 02:34:48,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 233 transitions, 2492 flow. Second operand has 12 states, 12 states have (on average 266.6666666666667) internal successors, (3200), 12 states have internal predecessors, (3200), 0 states have call successors, (0), 0 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 02:34:48,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:48,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 607 [2023-09-01 02:34:48,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:35:01,096 INFO L130 PetriNetUnfolder]: 63587/94949 cut-off events. [2023-09-01 02:35:01,096 INFO L131 PetriNetUnfolder]: For 220876/221408 co-relation queries the response was YES. [2023-09-01 02:35:01,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290697 conditions, 94949 events. 63587/94949 cut-off events. For 220876/221408 co-relation queries the response was YES. Maximal size of possible extension queue 2908. Compared 694763 event pairs, 32584 based on Foata normal form. 3003/80408 useless extension candidates. Maximal degree in co-relation 290639. Up to 23584 conditions per place. [2023-09-01 02:35:02,294 INFO L137 encePairwiseOnDemand]: 592/607 looper letters, 398 selfloop transitions, 36 changer transitions 0/466 dead transitions. [2023-09-01 02:35:02,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 466 transitions, 4907 flow [2023-09-01 02:35:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:35:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:35:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3682 transitions. [2023-09-01 02:35:02,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666075275630465 [2023-09-01 02:35:02,297 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3682 transitions. [2023-09-01 02:35:02,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3682 transitions. [2023-09-01 02:35:02,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:35:02,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3682 transitions. [2023-09-01 02:35:02,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 283.2307692307692) internal successors, (3682), 13 states have internal predecessors, (3682), 0 states have call successors, (0), 0 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 02:35:02,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 0 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 02:35:02,305 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 0 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 02:35:02,306 INFO L175 Difference]: Start difference. First operand has 179 places, 233 transitions, 2492 flow. Second operand 13 states and 3682 transitions. [2023-09-01 02:35:02,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 466 transitions, 4907 flow [2023-09-01 02:35:03,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 466 transitions, 4824 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:35:03,141 INFO L231 Difference]: Finished difference. Result has 194 places, 251 transitions, 2866 flow [2023-09-01 02:35:03,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2866, PETRI_PLACES=194, PETRI_TRANSITIONS=251} [2023-09-01 02:35:03,142 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 88 predicate places. [2023-09-01 02:35:03,142 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 251 transitions, 2866 flow [2023-09-01 02:35:03,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 266.6666666666667) internal successors, (3200), 12 states have internal predecessors, (3200), 0 states have call successors, (0), 0 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 02:35:03,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:35:03,143 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:35:03,150 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 02:35:03,343 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 02:35:03,344 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:35:03,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:35:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2086325012, now seen corresponding path program 2 times [2023-09-01 02:35:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:35:03,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327348583] [2023-09-01 02:35:03,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:35:03,345 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 02:35:03,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:35:03,346 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 02:35:03,346 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 02:35:03,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:35:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:35:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:35:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:35:03,553 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:35:03,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 02:35:03,590 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:35:03,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:35:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:35:03,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:35:03,752 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:35:03,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:35:03,795 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:35:03,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-09-01 02:35:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:35:03,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:35:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:35:12,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:35:12,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327348583] [2023-09-01 02:35:12,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327348583] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:35:12,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:35:12,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 02:35:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432972186] [2023-09-01 02:35:12,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:35:12,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:35:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:35:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:35:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=248, Unknown=3, NotChecked=0, Total=306 [2023-09-01 02:35:14,905 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 02:35:17,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:18,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:20,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:23,255 WARN L539 Checker$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 02:35:26,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:28,539 WARN L539 Checker$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 02:35:31,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:33,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:35:36,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:39,226 WARN L539 Checker$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 02:35:41,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:44,240 WARN L539 Checker$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 02:35:46,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:49,216 WARN L539 Checker$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 02:35:51,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:54,125 WARN L539 Checker$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 02:35:56,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:58,384 WARN L539 Checker$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 02:36:00,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:03,608 WARN L539 Checker$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 02:36:06,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:08,992 WARN L539 Checker$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 02:36:11,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:13,916 WARN L539 Checker$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 02:36:16,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:19,220 WARN L539 Checker$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 02:36:21,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:24,167 WARN L539 Checker$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 02:36:26,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:29,046 WARN L539 Checker$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 02:36:31,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:33,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:36:36,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:38,844 WARN L539 Checker$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 02:36:41,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:43,779 WARN L539 Checker$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 02:36:45,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:48,332 WARN L539 Checker$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 02:36:51,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:54,012 WARN L539 Checker$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 02:36:56,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:59,945 WARN L539 Checker$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 02:37:02,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:04,931 WARN L539 Checker$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 02:37:07,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:10,685 WARN L539 Checker$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 02:37:13,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:16,106 WARN L539 Checker$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 02:37:18,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:21,054 WARN L539 Checker$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 02:37:23,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:26,519 WARN L539 Checker$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 02:37:29,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:31,451 WARN L539 Checker$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 02:37:34,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:36,827 WARN L539 Checker$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 02:37:40,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:42,687 WARN L539 Checker$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 02:37:45,625 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 02:37:45,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 607 [2023-09-01 02:37:45,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 251 transitions, 2866 flow. Second operand has 18 states, 18 states have (on average 201.33333333333334) internal successors, (3624), 18 states have internal predecessors, (3624), 0 states have call successors, (0), 0 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 02:37:45,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:37:45,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 607 [2023-09-01 02:37:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:38:20,996 INFO L130 PetriNetUnfolder]: 122669/171399 cut-off events. [2023-09-01 02:38:20,996 INFO L131 PetriNetUnfolder]: For 434957/435051 co-relation queries the response was YES. [2023-09-01 02:38:22,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540945 conditions, 171399 events. 122669/171399 cut-off events. For 434957/435051 co-relation queries the response was YES. Maximal size of possible extension queue 4143. Compared 1169545 event pairs, 52152 based on Foata normal form. 2019/142098 useless extension candidates. Maximal degree in co-relation 540882. Up to 54083 conditions per place. [2023-09-01 02:38:23,661 INFO L137 encePairwiseOnDemand]: 589/607 looper letters, 711 selfloop transitions, 113 changer transitions 0/835 dead transitions. [2023-09-01 02:38:23,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 835 transitions, 7493 flow [2023-09-01 02:38:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:38:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:38:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3394 transitions. [2023-09-01 02:38:23,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39938809131560365 [2023-09-01 02:38:23,667 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3394 transitions. [2023-09-01 02:38:23,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3394 transitions. [2023-09-01 02:38:23,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:38:23,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3394 transitions. [2023-09-01 02:38:23,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 242.42857142857142) internal successors, (3394), 14 states have internal predecessors, (3394), 0 states have call successors, (0), 0 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 02:38:23,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 0 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 02:38:23,676 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 0 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 02:38:23,676 INFO L175 Difference]: Start difference. First operand has 194 places, 251 transitions, 2866 flow. Second operand 14 states and 3394 transitions. [2023-09-01 02:38:23,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 835 transitions, 7493 flow [2023-09-01 02:38:25,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 835 transitions, 7398 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-09-01 02:38:25,874 INFO L231 Difference]: Finished difference. Result has 207 places, 300 transitions, 3818 flow [2023-09-01 02:38:25,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3818, PETRI_PLACES=207, PETRI_TRANSITIONS=300} [2023-09-01 02:38:25,875 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 101 predicate places. [2023-09-01 02:38:25,875 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 300 transitions, 3818 flow [2023-09-01 02:38:25,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 201.33333333333334) internal successors, (3624), 18 states have internal predecessors, (3624), 0 states have call successors, (0), 0 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 02:38:25,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:38:25,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:38:25,885 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 02:38:26,076 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 02:38:26,077 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread5Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:38:26,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:38:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1481131628, now seen corresponding path program 1 times [2023-09-01 02:38:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:38:26,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370198867] [2023-09-01 02:38:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:38:26,078 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 02:38:26,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:38:26,079 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 02:38:26,081 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 02:38:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:38:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:38:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:38:26,433 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 02:38:26,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:38:26,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:38:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370198867] [2023-09-01 02:38:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370198867] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:38:26,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:38:26,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:38:26,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51471876] [2023-09-01 02:38:26,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:38:26,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:38:26,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:38:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:38:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:38:26,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-09-01 02:38:26,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 300 transitions, 3818 flow. Second operand has 4 states, 4 states have (on average 279.75) internal successors, (1119), 4 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:26,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:38:26,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-09-01 02:38:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:38:41,832 INFO L130 PetriNetUnfolder]: 74678/112214 cut-off events. [2023-09-01 02:38:41,833 INFO L131 PetriNetUnfolder]: For 368708/369205 co-relation queries the response was YES. [2023-09-01 02:38:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368817 conditions, 112214 events. 74678/112214 cut-off events. For 368708/369205 co-relation queries the response was YES. Maximal size of possible extension queue 3548. Compared 855802 event pairs, 50057 based on Foata normal form. 443/91021 useless extension candidates. Maximal degree in co-relation 368750. Up to 98121 conditions per place. [2023-09-01 02:38:43,531 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 214 selfloop transitions, 3 changer transitions 0/321 dead transitions. [2023-09-01 02:38:43,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 321 transitions, 4254 flow [2023-09-01 02:38:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:38:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:38:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1195 transitions. [2023-09-01 02:38:43,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492174629324547 [2023-09-01 02:38:43,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1195 transitions. [2023-09-01 02:38:43,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1195 transitions. [2023-09-01 02:38:43,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:38:43,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1195 transitions. [2023-09-01 02:38:43,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.75) internal successors, (1195), 4 states have internal predecessors, (1195), 0 states have call successors, (0), 0 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 02:38:43,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 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 02:38:43,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 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 02:38:43,537 INFO L175 Difference]: Start difference. First operand has 207 places, 300 transitions, 3818 flow. Second operand 4 states and 1195 transitions. [2023-09-01 02:38:43,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 321 transitions, 4254 flow [2023-09-01 02:38:45,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 321 transitions, 4054 flow, removed 76 selfloop flow, removed 2 redundant places. [2023-09-01 02:38:45,566 INFO L231 Difference]: Finished difference. Result has 209 places, 297 transitions, 3569 flow [2023-09-01 02:38:45,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3569, PETRI_PLACES=209, PETRI_TRANSITIONS=297} [2023-09-01 02:38:45,567 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 103 predicate places. [2023-09-01 02:38:45,567 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 297 transitions, 3569 flow [2023-09-01 02:38:45,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 279.75) internal successors, (1119), 4 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:45,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:38:45,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:38:45,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 02:38:45,767 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 02:38:45,768 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread5Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:38:45,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:38:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1590850601, now seen corresponding path program 1 times [2023-09-01 02:38:45,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:38:45,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613554182] [2023-09-01 02:38:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:38:45,769 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 02:38:45,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:38:45,770 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 02:38:45,773 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 02:38:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:38:45,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:38:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:38:46,081 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 02:38:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:38:46,230 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 02:38:46,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:38:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613554182] [2023-09-01 02:38:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613554182] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:38:46,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:38:46,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:38:46,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720557185] [2023-09-01 02:38:46,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:38:46,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:38:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:38:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:38:46,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:38:46,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-09-01 02:38:46,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 297 transitions, 3569 flow. Second operand has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 0 states have call successors, (0), 0 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 02:38:46,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:38:46,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-09-01 02:38:46,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:00,598 INFO L130 PetriNetUnfolder]: 67298/100941 cut-off events. [2023-09-01 02:39:00,599 INFO L131 PetriNetUnfolder]: For 315855/316329 co-relation queries the response was YES. [2023-09-01 02:39:01,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339147 conditions, 100941 events. 67298/100941 cut-off events. For 315855/316329 co-relation queries the response was YES. Maximal size of possible extension queue 3288. Compared 755404 event pairs, 41626 based on Foata normal form. 1736/91616 useless extension candidates. Maximal degree in co-relation 339078. Up to 66404 conditions per place. [2023-09-01 02:39:02,357 INFO L137 encePairwiseOnDemand]: 596/607 looper letters, 240 selfloop transitions, 36 changer transitions 0/380 dead transitions. [2023-09-01 02:39:02,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 380 transitions, 4388 flow [2023-09-01 02:39:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:39:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:39:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2609 transitions. [2023-09-01 02:39:02,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775764232106901 [2023-09-01 02:39:02,360 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2609 transitions. [2023-09-01 02:39:02,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2609 transitions. [2023-09-01 02:39:02,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:02,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2609 transitions. [2023-09-01 02:39:02,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 289.8888888888889) internal successors, (2609), 9 states have internal predecessors, (2609), 0 states have call successors, (0), 0 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 02:39:02,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 0 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 02:39:02,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 0 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 02:39:02,366 INFO L175 Difference]: Start difference. First operand has 209 places, 297 transitions, 3569 flow. Second operand 9 states and 2609 transitions. [2023-09-01 02:39:02,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 380 transitions, 4388 flow [2023-09-01 02:39:02,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 380 transitions, 4326 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:39:02,728 INFO L231 Difference]: Finished difference. Result has 213 places, 292 transitions, 3526 flow [2023-09-01 02:39:02,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3526, PETRI_PLACES=213, PETRI_TRANSITIONS=292} [2023-09-01 02:39:02,729 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 107 predicate places. [2023-09-01 02:39:02,729 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 292 transitions, 3526 flow [2023-09-01 02:39:02,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 0 states have call successors, (0), 0 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 02:39:02,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:02,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:39:02,737 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 02:39:02,931 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 02:39:02,931 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:39:02,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash -251564554, now seen corresponding path program 3 times [2023-09-01 02:39:02,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:02,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319122922] [2023-09-01 02:39:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:39:02,932 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 02:39:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:02,933 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 02:39:02,936 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