./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:23:06,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:23:06,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:23:07,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:23:07,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:23:07,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:23:07,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:23:07,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:23:07,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:23:07,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:23:07,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:23:07,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:23:07,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:23:07,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:23:07,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:23:07,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:23:07,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:23:07,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:23:07,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:23:07,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:23:07,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:23:07,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:23:07,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:23:07,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:23:07,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:23:07,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:23:07,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:23:07,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:23:07,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:23:07,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:23:07,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:23:07,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:23:07,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:23:07,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:23:07,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:23:07,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:23:07,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:23:07,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:23:07,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:23:07,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:23:07,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:23:07,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:23:07,134 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:23:07,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:23:07,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:23:07,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:23:07,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:23:07,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:23:07,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:23:07,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:23:07,138 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:23:07,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:23:07,139 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:23:07,139 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:23:07,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:23:07,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:23:07,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:23:07,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:23:07,140 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:23:07,141 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:23:07,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:23:07,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:23:07,141 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:23:07,141 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:23:07,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:23:07,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:23:07,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:23:07,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:07,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:23:07,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:23:07,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:23:07,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:23:07,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:23:07,143 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:23:07,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:23:07,144 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:23:07,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:23:07,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:23:07,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:23:07,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:23:07,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:23:07,521 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:23:07,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 00:23:08,724 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:23:08,927 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:23:08,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 00:23:08,933 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6d80783/b65aa6c221ee49f38afeef1ec3472bc9/FLAG7df07ca11 [2023-08-30 00:23:08,944 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6d80783/b65aa6c221ee49f38afeef1ec3472bc9 [2023-08-30 00:23:08,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:23:08,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:23:08,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:08,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:23:08,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:23:08,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:08" (1/1) ... [2023-08-30 00:23:08,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6099f0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:08, skipping insertion in model container [2023-08-30 00:23:08,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:08" (1/1) ... [2023-08-30 00:23:08,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:23:08,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:09,140 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 00:23:09,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:09,175 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:23:09,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34bbb7fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:09, skipping insertion in model container [2023-08-30 00:23:09,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:09,178 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:23:09,180 INFO L158 Benchmark]: Toolchain (without parser) took 230.08ms. Allocated memory is still 67.1MB. Free memory was 41.3MB in the beginning and 31.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:23:09,180 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 67.1MB. Free memory is still 45.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:23:09,181 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.63ms. Allocated memory is still 67.1MB. Free memory was 41.1MB in the beginning and 31.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:23:09,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 67.1MB. Free memory is still 45.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.63ms. Allocated memory is still 67.1MB. Free memory was 41.1MB in the beginning and 31.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:23:10,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:23:10,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:23:10,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:23:10,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:23:10,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:23:10,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:23:10,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:23:10,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:23:10,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:23:10,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:23:10,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:23:10,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:23:10,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:23:10,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:23:11,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:23:11,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:23:11,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:23:11,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:23:11,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:23:11,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:23:11,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:23:11,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:23:11,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:23:11,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:23:11,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:23:11,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:23:11,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:23:11,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:23:11,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:23:11,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:23:11,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:23:11,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:23:11,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:23:11,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:23:11,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:23:11,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:23:11,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:23:11,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:23:11,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:23:11,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:23:11,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:23:11,072 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:23:11,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:23:11,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:23:11,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:23:11,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:23:11,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:23:11,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:23:11,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:23:11,074 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:23:11,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:23:11,074 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:23:11,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:23:11,075 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:23:11,076 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:23:11,076 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:23:11,076 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:23:11,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:23:11,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:23:11,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:23:11,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:11,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:23:11,077 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:23:11,078 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:23:11,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:23:11,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:23:11,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:23:11,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:23:11,425 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:23:11,425 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:23:11,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 00:23:12,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:23:12,937 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:23:12,938 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 00:23:12,944 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6cfecfb0/e73f964f547043c3a6891fc8a0c6faef/FLAG3b2d00de6 [2023-08-30 00:23:12,967 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6cfecfb0/e73f964f547043c3a6891fc8a0c6faef [2023-08-30 00:23:12,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:23:12,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:23:12,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:12,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:23:12,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:23:12,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:12" (1/1) ... [2023-08-30 00:23:12,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0f53b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:12, skipping insertion in model container [2023-08-30 00:23:12,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:12" (1/1) ... [2023-08-30 00:23:12,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:23:13,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:13,205 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 00:23:13,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:13,237 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:23:13,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:13,272 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 00:23:13,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:13,288 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:23:13,327 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 00:23:13,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:13,346 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:23:13,347 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:23:13,353 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:23:13,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13 WrapperNode [2023-08-30 00:23:13,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:13,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:23:13,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:23:13,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:23:13,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,400 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2023-08-30 00:23:13,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:23:13,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:23:13,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:23:13,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:23:13,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,429 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:23:13,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:23:13,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:23:13,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:23:13,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (1/1) ... [2023-08-30 00:23:13,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:23:13,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:23:13,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:23:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:23:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:23:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:23:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:23:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:23:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:23:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:23:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:23:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:23:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:23:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:23:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:23:13,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:23:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:23:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:23:13,519 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:23:13,642 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:23:13,644 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:23:14,252 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:23:14,388 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:23:14,389 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:23:14,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:23:14 BoogieIcfgContainer [2023-08-30 00:23:14,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:23:14,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:23:14,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:23:14,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:23:14,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:23:12" (1/3) ... [2023-08-30 00:23:14,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fca1ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:23:14, skipping insertion in model container [2023-08-30 00:23:14,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:13" (2/3) ... [2023-08-30 00:23:14,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fca1ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:23:14, skipping insertion in model container [2023-08-30 00:23:14,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:23:14" (3/3) ... [2023-08-30 00:23:14,398 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-08-30 00:23:14,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:23:14,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 00:23:14,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:23:14,507 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:23:14,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 418 flow [2023-08-30 00:23:14,617 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-08-30 00:23:14,618 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:23:14,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-08-30 00:23:14,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 418 flow [2023-08-30 00:23:14,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:14,633 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:23:14,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:14,651 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:14,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:14,689 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-08-30 00:23:14,689 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:23:14,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 195 events. 15/195 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 218 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-08-30 00:23:14,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2023-08-30 00:23:33,036 INFO L134 LiptonReduction]: Checked pairs total: 3331 [2023-08-30 00:23:33,036 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-30 00:23:33,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:23:33,053 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;@e63ddec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:23:33,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-30 00:23:33,056 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:23:33,057 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:33,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:33,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:33,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:33,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash 26589, now seen corresponding path program 1 times [2023-08-30 00:23:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567984990] [2023-08-30 00:23:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:33,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:33,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:33,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:23:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:23:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:33,282 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:33,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:23:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:33,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:33,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567984990] [2023-08-30 00:23:33,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567984990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:33,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:33,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950152618] [2023-08-30 00:23:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:33,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:33,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:33,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:33,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:33,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:33,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:34,021 INFO L130 PetriNetUnfolder]: 436/746 cut-off events. [2023-08-30 00:23:34,021 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 00:23:34,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 746 events. 436/746 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4120 event pairs, 378 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 1382. Up to 726 conditions per place. [2023-08-30 00:23:34,034 INFO L137 encePairwiseOnDemand]: 401/413 looper letters, 46 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-30 00:23:34,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 216 flow [2023-08-30 00:23:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-30 00:23:34,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45117029862792574 [2023-08-30 00:23:34,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-30 00:23:34,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-30 00:23:34,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:34,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-30 00:23:34,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,080 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 108 flow. Second operand 3 states and 559 transitions. [2023-08-30 00:23:34,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 216 flow [2023-08-30 00:23:34,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:23:34,087 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 132 flow [2023-08-30 00:23:34,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-30 00:23:34,094 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-30 00:23:34,095 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 132 flow [2023-08-30 00:23:34,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:34,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:34,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:34,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:34,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:34,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash 26588, now seen corresponding path program 1 times [2023-08-30 00:23:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:34,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058315649] [2023-08-30 00:23:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:34,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:34,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:23:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:34,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:23:34,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:34,411 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:23:34,411 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 [2023-08-30 00:23:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:34,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:34,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:34,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058315649] [2023-08-30 00:23:34,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058315649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:34,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:34,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909650241] [2023-08-30 00:23:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:34,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:34,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:34,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:34,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:34,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:34,802 INFO L130 PetriNetUnfolder]: 436/740 cut-off events. [2023-08-30 00:23:34,803 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:34,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 740 events. 436/740 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4122 event pairs, 378 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 1467. Up to 726 conditions per place. [2023-08-30 00:23:34,807 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 00:23:34,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 212 flow [2023-08-30 00:23:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-30 00:23:34,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390637610976594 [2023-08-30 00:23:34,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-30 00:23:34,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-30 00:23:34,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:34,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-30 00:23:34,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,815 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 132 flow. Second operand 3 states and 544 transitions. [2023-08-30 00:23:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 212 flow [2023-08-30 00:23:34,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:34,817 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 120 flow [2023-08-30 00:23:34,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 00:23:34,817 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 00:23:34,818 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 120 flow [2023-08-30 00:23:34,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:34,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:34,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:34,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:35,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:35,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:35,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash 827133, now seen corresponding path program 1 times [2023-08-30 00:23:35,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:35,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014870895] [2023-08-30 00:23:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:35,030 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 [2023-08-30 00:23:35,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:35,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:35,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:23:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:23:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:35,129 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 8 treesize of output 7 [2023-08-30 00:23:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:35,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:35,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:35,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014870895] [2023-08-30 00:23:35,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014870895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:35,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:35,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:35,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375833844] [2023-08-30 00:23:35,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:35,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:35,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:35,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:35,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:35,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:35,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:35,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:35,570 INFO L130 PetriNetUnfolder]: 436/738 cut-off events. [2023-08-30 00:23:35,570 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:35,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 738 events. 436/738 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4090 event pairs, 378 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 1483. Up to 720 conditions per place. [2023-08-30 00:23:35,574 INFO L137 encePairwiseOnDemand]: 411/413 looper letters, 40 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 00:23:35,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 202 flow [2023-08-30 00:23:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 00:23:35,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43664245359160614 [2023-08-30 00:23:35,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 00:23:35,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 00:23:35,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:35,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 00:23:35,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:35,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:35,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:35,582 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 120 flow. Second operand 3 states and 541 transitions. [2023-08-30 00:23:35,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 202 flow [2023-08-30 00:23:35,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:35,584 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 121 flow [2023-08-30 00:23:35,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-30 00:23:35,585 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 00:23:35,585 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 121 flow [2023-08-30 00:23:35,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:35,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:35,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:35,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:35,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:35,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 826017, now seen corresponding path program 1 times [2023-08-30 00:23:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84224751] [2023-08-30 00:23:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:35,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:35,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:35,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:35,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:23:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:23:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:35,910 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:35,910 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 [2023-08-30 00:23:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:35,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:36,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:36,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84224751] [2023-08-30 00:23:36,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84224751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:36,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:36,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:23:36,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043914203] [2023-08-30 00:23:36,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:36,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:23:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:23:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:23:36,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 00:23:36,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:36,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:36,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 00:23:36,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:37,999 INFO L130 PetriNetUnfolder]: 878/1482 cut-off events. [2023-08-30 00:23:37,999 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1482 events. 878/1482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 9383 event pairs, 756 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 2992. Up to 723 conditions per place. [2023-08-30 00:23:38,007 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 71 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2023-08-30 00:23:38,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 443 flow [2023-08-30 00:23:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:23:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:23:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-08-30 00:23:38,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188861985472155 [2023-08-30 00:23:38,012 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-08-30 00:23:38,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-08-30 00:23:38,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:38,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-08-30 00:23:38,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:38,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:38,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:38,022 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 121 flow. Second operand 6 states and 1038 transitions. [2023-08-30 00:23:38,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 443 flow [2023-08-30 00:23:38,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:38,024 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 279 flow [2023-08-30 00:23:38,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2023-08-30 00:23:38,025 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-30 00:23:38,026 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 279 flow [2023-08-30 00:23:38,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:38,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:38,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:38,039 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 [2023-08-30 00:23:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:38,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:38,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 25640801, now seen corresponding path program 1 times [2023-08-30 00:23:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976854250] [2023-08-30 00:23:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:38,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:38,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:38,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:23:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:23:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:38,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,365 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 00:23:38,366 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 [2023-08-30 00:23:38,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 00:23:38,570 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:23:38,571 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 [2023-08-30 00:23:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:38,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:38,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976854250] [2023-08-30 00:23:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976854250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:38,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:38,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96880689] [2023-08-30 00:23:38,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:38,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:38,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:39,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:39,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:39,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:39,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:39,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:39,577 INFO L130 PetriNetUnfolder]: 876/1478 cut-off events. [2023-08-30 00:23:39,577 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:23:39,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 1478 events. 876/1478 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 9370 event pairs, 756 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 3026. Up to 1443 conditions per place. [2023-08-30 00:23:39,586 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 48 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-30 00:23:39,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 363 flow [2023-08-30 00:23:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:23:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:23:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-30 00:23:39,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279661016949153 [2023-08-30 00:23:39,588 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-30 00:23:39,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-30 00:23:39,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:39,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-30 00:23:39,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:39,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:39,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:39,595 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 279 flow. Second operand 4 states and 707 transitions. [2023-08-30 00:23:39,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 363 flow [2023-08-30 00:23:39,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 348 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:39,598 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 252 flow [2023-08-30 00:23:39,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-08-30 00:23:39,599 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 00:23:39,599 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 252 flow [2023-08-30 00:23:39,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:39,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:39,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:39,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:39,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:39,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash 25640802, now seen corresponding path program 1 times [2023-08-30 00:23:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:39,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472989409] [2023-08-30 00:23:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:39,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:39,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:39,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:23:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:23:39,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:39,955 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 00:23:39,956 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 00:23:39,995 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:23:39,996 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 [2023-08-30 00:23:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:40,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:40,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:40,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472989409] [2023-08-30 00:23:40,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472989409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:40,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:40,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:40,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739326867] [2023-08-30 00:23:40,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:40,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:40,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:40,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 413 [2023-08-30 00:23:40,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:40,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:40,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 413 [2023-08-30 00:23:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:40,404 INFO L130 PetriNetUnfolder]: 666/1156 cut-off events. [2023-08-30 00:23:40,404 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:23:40,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1156 events. 666/1156 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 7070 event pairs, 568 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 2368. Up to 1128 conditions per place. [2023-08-30 00:23:40,411 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 49 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 00:23:40,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 328 flow [2023-08-30 00:23:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-30 00:23:40,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44229217110573044 [2023-08-30 00:23:40,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-30 00:23:40,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-30 00:23:40,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:40,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-30 00:23:40,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:40,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:40,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:40,418 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 252 flow. Second operand 3 states and 548 transitions. [2023-08-30 00:23:40,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 328 flow [2023-08-30 00:23:40,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:40,424 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 223 flow [2023-08-30 00:23:40,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-30 00:23:40,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-30 00:23:40,427 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 223 flow [2023-08-30 00:23:40,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:40,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:40,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:23:40,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:40,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:40,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1160185635, now seen corresponding path program 2 times [2023-08-30 00:23:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478511143] [2023-08-30 00:23:40,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:23:40,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:40,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:40,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:23:40,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:23:40,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:23:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:23:40,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:40,789 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:40,790 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 [2023-08-30 00:23:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:40,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:41,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478511143] [2023-08-30 00:23:41,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478511143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:41,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:41,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:23:41,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443867497] [2023-08-30 00:23:41,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:23:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:23:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:23:44,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:23:44,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:44,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:44,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:23:44,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:47,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:49,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:51,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:54,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:56,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:59,416 INFO L130 PetriNetUnfolder]: 2646/4583 cut-off events. [2023-08-30 00:23:59,416 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 00:23:59,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 4583 events. 2646/4583 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33496 event pairs, 2272 based on Foata normal form. 11/1781 useless extension candidates. Maximal degree in co-relation 9280. Up to 557 conditions per place. [2023-08-30 00:23:59,465 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 244 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2023-08-30 00:23:59,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 281 transitions, 1401 flow [2023-08-30 00:23:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:23:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:23:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2675 transitions. [2023-08-30 00:23:59,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317998385794996 [2023-08-30 00:23:59,474 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2675 transitions. [2023-08-30 00:23:59,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2675 transitions. [2023-08-30 00:23:59,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:59,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2675 transitions. [2023-08-30 00:23:59,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.33333333333334) internal successors, (2675), 15 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,491 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,491 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 223 flow. Second operand 15 states and 2675 transitions. [2023-08-30 00:23:59,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 281 transitions, 1401 flow [2023-08-30 00:23:59,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 281 transitions, 1400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:59,497 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 526 flow [2023-08-30 00:23:59,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=526, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-30 00:23:59,499 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2023-08-30 00:23:59,499 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 526 flow [2023-08-30 00:23:59,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:59,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:59,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:59,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:59,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:59,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971168, now seen corresponding path program 1 times [2023-08-30 00:23:59,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:59,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439057797] [2023-08-30 00:23:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:59,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:59,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:23:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:59,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:23:59,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:59,859 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 00:23:59,859 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 [2023-08-30 00:23:59,869 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 42 treesize of output 38 [2023-08-30 00:23:59,924 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:23:59,925 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 [2023-08-30 00:24:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:00,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:00,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:00,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439057797] [2023-08-30 00:24:00,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439057797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:00,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:00,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-08-30 00:24:00,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818347540] [2023-08-30 00:24:00,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:00,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 00:24:00,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 00:24:00,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-08-30 00:24:01,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-08-30 00:24:01,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 526 flow. Second operand has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:01,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:01,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-08-30 00:24:01,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:02,936 INFO L130 PetriNetUnfolder]: 2518/4327 cut-off events. [2023-08-30 00:24:02,948 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 00:24:02,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4327 events. 2518/4327 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31554 event pairs, 2160 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 8842. Up to 3668 conditions per place. [2023-08-30 00:24:02,978 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 83 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2023-08-30 00:24:02,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 788 flow [2023-08-30 00:24:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:24:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:24:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1312 transitions. [2023-08-30 00:24:02,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39709443099273606 [2023-08-30 00:24:02,985 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1312 transitions. [2023-08-30 00:24:02,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1312 transitions. [2023-08-30 00:24:02,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:02,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1312 transitions. [2023-08-30 00:24:02,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:02,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:02,994 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:02,994 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 526 flow. Second operand 8 states and 1312 transitions. [2023-08-30 00:24:02,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 788 flow [2023-08-30 00:24:02,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 702 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 00:24:02,999 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 483 flow [2023-08-30 00:24:02,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=483, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-30 00:24:03,002 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-08-30 00:24:03,002 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 483 flow [2023-08-30 00:24:03,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:03,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:03,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:03,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:03,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:03,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:03,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971167, now seen corresponding path program 1 times [2023-08-30 00:24:03,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:03,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217180726] [2023-08-30 00:24:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:03,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:03,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:03,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:03,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:24:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:24:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:03,330 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 00:24:03,330 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 00:24:03,354 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:24:03,355 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 [2023-08-30 00:24:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:03,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:03,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217180726] [2023-08-30 00:24:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217180726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:03,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:03,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:24:03,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886164298] [2023-08-30 00:24:03,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:03,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:24:03,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:24:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:24:03,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-08-30 00:24:03,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 483 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:03,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:03,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-08-30 00:24:03,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:03,991 INFO L130 PetriNetUnfolder]: 2390/4071 cut-off events. [2023-08-30 00:24:03,991 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2023-08-30 00:24:04,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8325 conditions, 4071 events. 2390/4071 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 29081 event pairs, 2048 based on Foata normal form. 0/1679 useless extension candidates. Maximal degree in co-relation 8300. Up to 3959 conditions per place. [2023-08-30 00:24:04,015 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 70 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-30 00:24:04,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 621 flow [2023-08-30 00:24:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:24:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:24:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-30 00:24:04,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43422114608555284 [2023-08-30 00:24:04,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-30 00:24:04,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-30 00:24:04,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:04,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-30 00:24:04,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,023 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 483 flow. Second operand 3 states and 538 transitions. [2023-08-30 00:24:04,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 621 flow [2023-08-30 00:24:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 584 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:04,030 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 444 flow [2023-08-30 00:24:04,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-08-30 00:24:04,032 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-08-30 00:24:04,032 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 444 flow [2023-08-30 00:24:04,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:04,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:04,047 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 (10)] Ended with exit code 0 [2023-08-30 00:24:04,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:04,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:04,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:04,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971283, now seen corresponding path program 1 times [2023-08-30 00:24:04,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:04,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506510400] [2023-08-30 00:24:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:04,244 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:04,247 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 (11)] Waiting until timeout for monitored process [2023-08-30 00:24:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:24:04,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:04,325 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 [2023-08-30 00:24:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:04,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:04,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506510400] [2023-08-30 00:24:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506510400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:04,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:24:04,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749833116] [2023-08-30 00:24:04,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:04,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:04,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:04,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:24:04,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 444 flow. Second operand has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:04,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:24:04,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:04,970 INFO L130 PetriNetUnfolder]: 1998/3399 cut-off events. [2023-08-30 00:24:04,971 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-30 00:24:04,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 3399 events. 1998/3399 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23269 event pairs, 1664 based on Foata normal form. 0/1511 useless extension candidates. Maximal degree in co-relation 6935. Up to 3266 conditions per place. [2023-08-30 00:24:04,986 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 58 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2023-08-30 00:24:04,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 578 flow [2023-08-30 00:24:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-08-30 00:24:04,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043583535108959 [2023-08-30 00:24:04,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-08-30 00:24:04,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-08-30 00:24:04,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:04,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-08-30 00:24:04,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,994 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 444 flow. Second operand 4 states and 668 transitions. [2023-08-30 00:24:04,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 578 flow [2023-08-30 00:24:04,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:04,998 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 461 flow [2023-08-30 00:24:04,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-30 00:24:04,998 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-08-30 00:24:04,999 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 461 flow [2023-08-30 00:24:04,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:04,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:04,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:05,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:05,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:05,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:05,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:05,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971282, now seen corresponding path program 1 times [2023-08-30 00:24:05,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:05,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265960323] [2023-08-30 00:24:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:05,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:05,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:05,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:24:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:24:05,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:05,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:05,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265960323] [2023-08-30 00:24:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265960323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:05,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:05,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:24:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106968280] [2023-08-30 00:24:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:24:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:24:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:24:05,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-30 00:24:05,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:05,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:05,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-30 00:24:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:06,289 INFO L130 PetriNetUnfolder]: 3534/5975 cut-off events. [2023-08-30 00:24:06,289 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 00:24:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 5975 events. 3534/5975 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 44824 event pairs, 1280 based on Foata normal form. 0/2719 useless extension candidates. Maximal degree in co-relation 12169. Up to 3521 conditions per place. [2023-08-30 00:24:06,313 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 76 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2023-08-30 00:24:06,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 682 flow [2023-08-30 00:24:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-08-30 00:24:06,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43099273607748184 [2023-08-30 00:24:06,316 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-08-30 00:24:06,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-08-30 00:24:06,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:06,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-08-30 00:24:06,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:06,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:06,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:06,321 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 461 flow. Second operand 4 states and 712 transitions. [2023-08-30 00:24:06,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 682 flow [2023-08-30 00:24:06,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 670 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:06,325 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 499 flow [2023-08-30 00:24:06,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2023-08-30 00:24:06,326 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-08-30 00:24:06,326 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 499 flow [2023-08-30 00:24:06,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:06,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:06,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:06,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:06,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:06,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971162, now seen corresponding path program 1 times [2023-08-30 00:24:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:06,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416271177] [2023-08-30 00:24:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:06,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:06,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:06,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:24:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:24:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:06,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:06,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416271177] [2023-08-30 00:24:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416271177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:06,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:06,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665700315] [2023-08-30 00:24:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:06,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:24:06,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 499 flow. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:06,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:06,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:24:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:07,490 INFO L130 PetriNetUnfolder]: 4080/7110 cut-off events. [2023-08-30 00:24:07,490 INFO L131 PetriNetUnfolder]: For 751/751 co-relation queries the response was YES. [2023-08-30 00:24:07,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15949 conditions, 7110 events. 4080/7110 cut-off events. For 751/751 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 56541 event pairs, 3552 based on Foata normal form. 128/4150 useless extension candidates. Maximal degree in co-relation 15922. Up to 5894 conditions per place. [2023-08-30 00:24:07,528 INFO L137 encePairwiseOnDemand]: 403/413 looper letters, 105 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-30 00:24:07,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 967 flow [2023-08-30 00:24:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-08-30 00:24:07,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43825665859564167 [2023-08-30 00:24:07,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-08-30 00:24:07,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-08-30 00:24:07,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:07,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-08-30 00:24:07,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,539 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 499 flow. Second operand 4 states and 724 transitions. [2023-08-30 00:24:07,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 967 flow [2023-08-30 00:24:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 942 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:07,545 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 506 flow [2023-08-30 00:24:07,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-08-30 00:24:07,546 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-08-30 00:24:07,546 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 506 flow [2023-08-30 00:24:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:07,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:07,576 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 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:07,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:07,769 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:07,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800086, now seen corresponding path program 1 times [2023-08-30 00:24:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079274956] [2023-08-30 00:24:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:07,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:07,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:07,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:24:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:24:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:07,932 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:24:07,932 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 [2023-08-30 00:24:07,963 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:24:07,964 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 [2023-08-30 00:24:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:24:07,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:07,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:07,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079274956] [2023-08-30 00:24:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079274956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:07,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:07,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:07,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058939603] [2023-08-30 00:24:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:07,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:08,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-30 00:24:08,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:08,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:08,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-30 00:24:08,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:08,749 INFO L130 PetriNetUnfolder]: 3048/5430 cut-off events. [2023-08-30 00:24:08,749 INFO L131 PetriNetUnfolder]: For 1495/1519 co-relation queries the response was YES. [2023-08-30 00:24:08,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13408 conditions, 5430 events. 3048/5430 cut-off events. For 1495/1519 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 41967 event pairs, 2600 based on Foata normal form. 0/4110 useless extension candidates. Maximal degree in co-relation 13380. Up to 5329 conditions per place. [2023-08-30 00:24:08,820 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 57 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2023-08-30 00:24:08,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 636 flow [2023-08-30 00:24:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 690 transitions. [2023-08-30 00:24:08,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41767554479418884 [2023-08-30 00:24:08,824 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 690 transitions. [2023-08-30 00:24:08,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 690 transitions. [2023-08-30 00:24:08,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:08,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 690 transitions. [2023-08-30 00:24:08,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:08,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:08,828 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:08,828 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 506 flow. Second operand 4 states and 690 transitions. [2023-08-30 00:24:08,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 636 flow [2023-08-30 00:24:08,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 631 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:08,834 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 517 flow [2023-08-30 00:24:08,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=517, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-30 00:24:08,835 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-08-30 00:24:08,835 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 517 flow [2023-08-30 00:24:08,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:08,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:08,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:08,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:09,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:09,046 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:09,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800085, now seen corresponding path program 1 times [2023-08-30 00:24:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:09,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666724335] [2023-08-30 00:24:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:09,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:09,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:09,048 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:09,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:24:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:24:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:09,244 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:24:09,244 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 [2023-08-30 00:24:09,297 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:24:09,297 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 [2023-08-30 00:24:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:09,400 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 14 treesize of output 16 [2023-08-30 00:24:09,413 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:24:09,414 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 [2023-08-30 00:24:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:09,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:10,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:10,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666724335] [2023-08-30 00:24:10,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666724335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:10,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:10,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:24:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501400693] [2023-08-30 00:24:10,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:24:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:24:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:24:13,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:24:22,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 413 [2023-08-30 00:24:22,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:22,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:22,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 413 [2023-08-30 00:24:22,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:28,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:24:35,330 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:24:46,702 INFO L130 PetriNetUnfolder]: 6284/11124 cut-off events. [2023-08-30 00:24:46,702 INFO L131 PetriNetUnfolder]: For 3443/3443 co-relation queries the response was YES. [2023-08-30 00:24:46,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 11124 events. 6284/11124 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 92991 event pairs, 5256 based on Foata normal form. 352/9267 useless extension candidates. Maximal degree in co-relation 27292. Up to 4194 conditions per place. [2023-08-30 00:24:46,783 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 125 selfloop transitions, 48 changer transitions 0/175 dead transitions. [2023-08-30 00:24:46,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 175 transitions, 1452 flow [2023-08-30 00:24:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:24:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:24:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2339 transitions. [2023-08-30 00:24:46,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37756255044390635 [2023-08-30 00:24:46,791 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2339 transitions. [2023-08-30 00:24:46,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2339 transitions. [2023-08-30 00:24:46,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:46,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2339 transitions. [2023-08-30 00:24:46,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.93333333333334) internal successors, (2339), 15 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:46,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:46,898 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:46,898 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 517 flow. Second operand 15 states and 2339 transitions. [2023-08-30 00:24:46,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 175 transitions, 1452 flow [2023-08-30 00:24:46,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 175 transitions, 1439 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:46,913 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 937 flow [2023-08-30 00:24:46,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=937, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-08-30 00:24:46,914 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2023-08-30 00:24:46,915 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 937 flow [2023-08-30 00:24:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:46,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:46,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:46,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:47,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:47,126 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:47,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:47,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1685451407, now seen corresponding path program 1 times [2023-08-30 00:24:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:47,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655000739] [2023-08-30 00:24:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:47,128 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:47,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:24:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:47,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:24:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:47,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:47,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:47,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655000739] [2023-08-30 00:24:47,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655000739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:47,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:47,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421753845] [2023-08-30 00:24:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:47,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-08-30 00:24:47,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 937 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:47,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:47,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-08-30 00:24:47,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:48,392 INFO L130 PetriNetUnfolder]: 4204/7900 cut-off events. [2023-08-30 00:24:48,392 INFO L131 PetriNetUnfolder]: For 4476/4572 co-relation queries the response was YES. [2023-08-30 00:24:48,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20553 conditions, 7900 events. 4204/7900 cut-off events. For 4476/4572 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 67144 event pairs, 3440 based on Foata normal form. 0/7268 useless extension candidates. Maximal degree in co-relation 20519. Up to 7669 conditions per place. [2023-08-30 00:24:48,429 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 52 selfloop transitions, 43 changer transitions 0/97 dead transitions. [2023-08-30 00:24:48,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 1125 flow [2023-08-30 00:24:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 700 transitions. [2023-08-30 00:24:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423728813559322 [2023-08-30 00:24:48,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 700 transitions. [2023-08-30 00:24:48,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 700 transitions. [2023-08-30 00:24:48,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:48,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 700 transitions. [2023-08-30 00:24:48,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:48,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:48,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:48,436 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 937 flow. Second operand 4 states and 700 transitions. [2023-08-30 00:24:48,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 1125 flow [2023-08-30 00:24:48,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 97 transitions, 1105 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:48,450 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 1001 flow [2023-08-30 00:24:48,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1001, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-08-30 00:24:48,450 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2023-08-30 00:24:48,451 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 1001 flow [2023-08-30 00:24:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:48,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:48,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:48,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-30 00:24:48,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:48,661 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:48,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:48,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1685344759, now seen corresponding path program 1 times [2023-08-30 00:24:48,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:48,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205830367] [2023-08-30 00:24:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:48,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:48,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:48,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:24:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:24:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:48,780 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 8 treesize of output 7 [2023-08-30 00:24:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:49,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:49,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205830367] [2023-08-30 00:24:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205830367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:49,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:49,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:24:49,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098898594] [2023-08-30 00:24:49,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:24:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:24:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:24:52,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 00:24:52,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 1001 flow. Second operand has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:52,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:52,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 00:24:52,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:55,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:24:57,194 INFO L130 PetriNetUnfolder]: 8420/15284 cut-off events. [2023-08-30 00:24:57,194 INFO L131 PetriNetUnfolder]: For 6726/6822 co-relation queries the response was YES. [2023-08-30 00:24:57,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40042 conditions, 15284 events. 8420/15284 cut-off events. For 6726/6822 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 136541 event pairs, 928 based on Foata normal form. 768/14972 useless extension candidates. Maximal degree in co-relation 40007. Up to 4336 conditions per place. [2023-08-30 00:24:57,262 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 96 selfloop transitions, 54 changer transitions 0/152 dead transitions. [2023-08-30 00:24:57,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 1497 flow [2023-08-30 00:24:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:24:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:24:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-30 00:24:57,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067796610169492 [2023-08-30 00:24:57,267 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-30 00:24:57,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-30 00:24:57,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:57,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-30 00:24:57,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,274 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 1001 flow. Second operand 8 states and 1344 transitions. [2023-08-30 00:24:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 1497 flow [2023-08-30 00:24:57,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1411 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:57,294 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 1119 flow [2023-08-30 00:24:57,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2023-08-30 00:24:57,294 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2023-08-30 00:24:57,294 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 1119 flow [2023-08-30 00:24:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:57,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:57,308 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 [2023-08-30 00:24:57,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:57,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:57,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1188910439, now seen corresponding path program 2 times [2023-08-30 00:24:57,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:57,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407873907] [2023-08-30 00:24:57,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:24:57,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:57,506 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:24:57,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:24:57,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:24:57,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:24:57,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:57,703 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:24:57,704 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 [2023-08-30 00:24:57,787 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:24:57,787 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 [2023-08-30 00:24:57,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,911 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 14 treesize of output 16 [2023-08-30 00:24:57,931 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:24:57,931 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 [2023-08-30 00:24:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 00:24:57,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:57,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:57,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407873907] [2023-08-30 00:24:57,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407873907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:57,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:57,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433029914] [2023-08-30 00:24:57,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:57,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:57,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:58,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 413 [2023-08-30 00:24:58,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 1119 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:58,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:58,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 413 [2023-08-30 00:24:58,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:59,981 INFO L130 PetriNetUnfolder]: 7300/13476 cut-off events. [2023-08-30 00:24:59,981 INFO L131 PetriNetUnfolder]: For 15415/15543 co-relation queries the response was YES. [2023-08-30 00:25:00,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40767 conditions, 13476 events. 7300/13476 cut-off events. For 15415/15543 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 120907 event pairs, 5936 based on Foata normal form. 728/13812 useless extension candidates. Maximal degree in co-relation 40727. Up to 13239 conditions per place. [2023-08-30 00:25:00,063 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 87 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-08-30 00:25:00,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 1287 flow [2023-08-30 00:25:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:25:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:25:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 671 transitions. [2023-08-30 00:25:00,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40617433414043586 [2023-08-30 00:25:00,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 671 transitions. [2023-08-30 00:25:00,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 671 transitions. [2023-08-30 00:25:00,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:00,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 671 transitions. [2023-08-30 00:25:00,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:00,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:00,069 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:00,069 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 1119 flow. Second operand 4 states and 671 transitions. [2023-08-30 00:25:00,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 1287 flow [2023-08-30 00:25:00,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 1180 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 00:25:00,118 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 1006 flow [2023-08-30 00:25:00,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1006, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2023-08-30 00:25:00,119 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2023-08-30 00:25:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 1006 flow [2023-08-30 00:25:00,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:00,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:00,120 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:00,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:00,329 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:25:00,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -944515027, now seen corresponding path program 1 times [2023-08-30 00:25:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469398883] [2023-08-30 00:25:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:00,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:00,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:00,331 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:00,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:25:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:25:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:25:00,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:00,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-08-30 00:25:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:25:00,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469398883] [2023-08-30 00:25:00,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469398883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:00,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:00,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:25:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173923777] [2023-08-30 00:25:00,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:25:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:25:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:25:02,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 413 [2023-08-30 00:25:02,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 1006 flow. Second operand has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:02,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:02,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 413 [2023-08-30 00:25:02,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:05,263 INFO L130 PetriNetUnfolder]: 6740/12756 cut-off events. [2023-08-30 00:25:05,263 INFO L131 PetriNetUnfolder]: For 7985/8057 co-relation queries the response was YES. [2023-08-30 00:25:05,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38158 conditions, 12756 events. 6740/12756 cut-off events. For 7985/8057 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 114831 event pairs, 752 based on Foata normal form. 576/13044 useless extension candidates. Maximal degree in co-relation 38119. Up to 2161 conditions per place. [2023-08-30 00:25:05,347 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 112 selfloop transitions, 44 changer transitions 0/158 dead transitions. [2023-08-30 00:25:05,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 158 transitions, 1475 flow [2023-08-30 00:25:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:25:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:25:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1693 transitions. [2023-08-30 00:25:05,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099273607748184 [2023-08-30 00:25:05,352 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1693 transitions. [2023-08-30 00:25:05,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1693 transitions. [2023-08-30 00:25:05,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:05,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1693 transitions. [2023-08-30 00:25:05,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,360 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,360 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 1006 flow. Second operand 10 states and 1693 transitions. [2023-08-30 00:25:05,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 158 transitions, 1475 flow [2023-08-30 00:25:05,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1450 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 00:25:05,427 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 1077 flow [2023-08-30 00:25:05,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1077, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2023-08-30 00:25:05,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2023-08-30 00:25:05,428 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 1077 flow [2023-08-30 00:25:05,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:05,428 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-08-30 00:25:05,441 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 [2023-08-30 00:25:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:05,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:25:05,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1765179930, now seen corresponding path program 1 times [2023-08-30 00:25:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285849254] [2023-08-30 00:25:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:05,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:05,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:05,641 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:05,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:25:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:25:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:05,760 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 8 treesize of output 7 [2023-08-30 00:25:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:06,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:08,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285849254] [2023-08-30 00:25:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285849254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:08,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 00:25:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026081639] [2023-08-30 00:25:08,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:08,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:25:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:25:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:25:25,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:25:25,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 1077 flow. Second operand has 20 states, 20 states have (on average 160.05) internal successors, (3201), 20 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:25,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:25,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:25:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:29,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:31,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:33,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:35,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:37,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:38,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:40,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:42,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:44,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:46,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:47,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:51,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:53,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:56,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:26:06,461 INFO L130 PetriNetUnfolder]: 13513/25580 cut-off events. [2023-08-30 00:26:06,461 INFO L131 PetriNetUnfolder]: For 20830/20836 co-relation queries the response was YES. [2023-08-30 00:26:06,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79389 conditions, 25580 events. 13513/25580 cut-off events. For 20830/20836 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 243573 event pairs, 11328 based on Foata normal form. 39/25599 useless extension candidates. Maximal degree in co-relation 79350. Up to 4321 conditions per place. [2023-08-30 00:26:06,628 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 506 selfloop transitions, 59 changer transitions 0/567 dead transitions. [2023-08-30 00:26:06,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 567 transitions, 5105 flow [2023-08-30 00:26:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:26:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:26:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4174 transitions. [2023-08-30 00:26:06,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42110573042776434 [2023-08-30 00:26:06,636 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4174 transitions. [2023-08-30 00:26:06,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4174 transitions. [2023-08-30 00:26:06,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:06,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4174 transitions. [2023-08-30 00:26:06,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 173.91666666666666) internal successors, (4174), 24 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:06,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:06,656 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:06,656 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 1077 flow. Second operand 24 states and 4174 transitions. [2023-08-30 00:26:06,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 567 transitions, 5105 flow [2023-08-30 00:26:06,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 567 transitions, 4647 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-08-30 00:26:06,891 INFO L231 Difference]: Finished difference. Result has 132 places, 127 transitions, 1456 flow [2023-08-30 00:26:06,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1456, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2023-08-30 00:26:06,892 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2023-08-30 00:26:06,892 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 1456 flow [2023-08-30 00:26:06,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 160.05) internal successors, (3201), 20 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:06,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:06,893 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1] [2023-08-30 00:26:06,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:07,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:07,094 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:26:07,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1790483165, now seen corresponding path program 3 times [2023-08-30 00:26:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:07,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313875663] [2023-08-30 00:26:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:26:07,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:07,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:07,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:26:07,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 00:26:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:26:07,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:26:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:07,366 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:26:07,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:26:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:08,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:11,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313875663] [2023-08-30 00:26:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313875663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:11,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:11,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-08-30 00:26:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20262413] [2023-08-30 00:26:11,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:11,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:26:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:26:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:26:45,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:26:45,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 1456 flow. Second operand has 28 states, 28 states have (on average 160.0) internal successors, (4480), 28 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:45,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:45,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:26:45,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:59,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:01,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:03,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:04,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:06,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:08,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:10,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:12,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:14,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:16,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:18,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:20,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:40,920 INFO L130 PetriNetUnfolder]: 13524/25600 cut-off events. [2023-08-30 00:27:40,921 INFO L131 PetriNetUnfolder]: For 13867/13867 co-relation queries the response was YES. [2023-08-30 00:27:41,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74823 conditions, 25600 events. 13524/25600 cut-off events. For 13867/13867 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 242421 event pairs, 11328 based on Foata normal form. 13/25119 useless extension candidates. Maximal degree in co-relation 74772. Up to 4719 conditions per place. [2023-08-30 00:27:41,217 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 442 selfloop transitions, 84 changer transitions 0/528 dead transitions. [2023-08-30 00:27:41,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 528 transitions, 4764 flow [2023-08-30 00:27:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 00:27:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 00:27:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4791 transitions. [2023-08-30 00:27:41,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41430300933932895 [2023-08-30 00:27:41,223 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4791 transitions. [2023-08-30 00:27:41,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4791 transitions. [2023-08-30 00:27:41,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:41,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4791 transitions. [2023-08-30 00:27:41,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 171.10714285714286) internal successors, (4791), 28 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:41,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 413.0) internal successors, (11977), 29 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:41,234 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 413.0) internal successors, (11977), 29 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:41,234 INFO L175 Difference]: Start difference. First operand has 132 places, 127 transitions, 1456 flow. Second operand 28 states and 4791 transitions. [2023-08-30 00:27:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 528 transitions, 4764 flow [2023-08-30 00:27:41,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 528 transitions, 4623 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-08-30 00:27:41,469 INFO L231 Difference]: Finished difference. Result has 164 places, 155 transitions, 1969 flow [2023-08-30 00:27:41,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1969, PETRI_PLACES=164, PETRI_TRANSITIONS=155} [2023-08-30 00:27:41,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 114 predicate places. [2023-08-30 00:27:41,470 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 155 transitions, 1969 flow [2023-08-30 00:27:41,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.0) internal successors, (4480), 28 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:41,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:41,471 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:27:41,479 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 [2023-08-30 00:27:41,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:41,671 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:27:41,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1635547502, now seen corresponding path program 2 times [2023-08-30 00:27:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:41,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346512013] [2023-08-30 00:27:41,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:27:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:41,674 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:41,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:27:41,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:27:41,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:27:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:27:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:41,818 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 8 treesize of output 7 [2023-08-30 00:27:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:42,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:44,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:44,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346512013] [2023-08-30 00:27:44,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346512013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:44,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:44,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-30 00:27:44,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394460624] [2023-08-30 00:27:44,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:44,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:27:44,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:44,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:27:44,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:27:56,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 413 [2023-08-30 00:27:56,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 155 transitions, 1969 flow. Second operand has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:56,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:56,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 413 [2023-08-30 00:27:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:09,911 INFO L130 PetriNetUnfolder]: 13222/25036 cut-off events. [2023-08-30 00:28:09,911 INFO L131 PetriNetUnfolder]: For 11037/11037 co-relation queries the response was YES. [2023-08-30 00:28:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73425 conditions, 25036 events. 13222/25036 cut-off events. For 11037/11037 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 237603 event pairs, 1504 based on Foata normal form. 90/24616 useless extension candidates. Maximal degree in co-relation 73359. Up to 8900 conditions per place. [2023-08-30 00:28:10,170 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 169 selfloop transitions, 111 changer transitions 0/282 dead transitions. [2023-08-30 00:28:10,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 282 transitions, 2937 flow [2023-08-30 00:28:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:28:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:28:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3174 transitions. [2023-08-30 00:28:10,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842615012106538 [2023-08-30 00:28:10,174 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3174 transitions. [2023-08-30 00:28:10,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3174 transitions. [2023-08-30 00:28:10,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:10,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3174 transitions. [2023-08-30 00:28:10,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 158.7) internal successors, (3174), 20 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,181 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,181 INFO L175 Difference]: Start difference. First operand has 164 places, 155 transitions, 1969 flow. Second operand 20 states and 3174 transitions. [2023-08-30 00:28:10,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 282 transitions, 2937 flow [2023-08-30 00:28:10,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 282 transitions, 2759 flow, removed 38 selfloop flow, removed 14 redundant places. [2023-08-30 00:28:10,425 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 2124 flow [2023-08-30 00:28:10,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2124, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2023-08-30 00:28:10,425 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 121 predicate places. [2023-08-30 00:28:10,425 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 2124 flow [2023-08-30 00:28:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:10,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:10,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:10,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:10,626 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:28:10,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1883482390, now seen corresponding path program 1 times [2023-08-30 00:28:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898617182] [2023-08-30 00:28:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:10,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:10,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:10,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:28:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:28:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:10,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:10,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:10,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898617182] [2023-08-30 00:28:10,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898617182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:10,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:10,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:28:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902849330] [2023-08-30 00:28:10,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:10,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:28:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:28:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:28:10,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 413 [2023-08-30 00:28:10,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 2124 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:10,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 413 [2023-08-30 00:28:10,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:18,035 INFO L130 PetriNetUnfolder]: 27870/47826 cut-off events. [2023-08-30 00:28:18,035 INFO L131 PetriNetUnfolder]: For 42480/42480 co-relation queries the response was YES. [2023-08-30 00:28:18,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149654 conditions, 47826 events. 27870/47826 cut-off events. For 42480/42480 co-relation queries the response was YES. Maximal size of possible extension queue 1355. Compared 405909 event pairs, 7232 based on Foata normal form. 2892/50718 useless extension candidates. Maximal degree in co-relation 149585. Up to 19485 conditions per place. [2023-08-30 00:28:18,710 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 157 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2023-08-30 00:28:18,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 215 transitions, 2853 flow [2023-08-30 00:28:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:28:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:28:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2023-08-30 00:28:18,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43341404358353514 [2023-08-30 00:28:18,712 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2023-08-30 00:28:18,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2023-08-30 00:28:18,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:18,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2023-08-30 00:28:18,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:18,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:18,715 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:18,715 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 2124 flow. Second operand 5 states and 895 transitions. [2023-08-30 00:28:18,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 215 transitions, 2853 flow [2023-08-30 00:28:20,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 215 transitions, 2587 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-08-30 00:28:20,370 INFO L231 Difference]: Finished difference. Result has 167 places, 199 transitions, 2321 flow [2023-08-30 00:28:20,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2321, PETRI_PLACES=167, PETRI_TRANSITIONS=199} [2023-08-30 00:28:20,370 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2023-08-30 00:28:20,371 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 199 transitions, 2321 flow [2023-08-30 00:28:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:20,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:20,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 00:28:20,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:20,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:20,573 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:28:20,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1796854613, now seen corresponding path program 3 times [2023-08-30 00:28:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:20,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148807291] [2023-08-30 00:28:20,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:28:20,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:20,575 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:20,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:28:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:28:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:28:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:20,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:28:20,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 00:28:21,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2023-08-30 00:28:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-30 00:28:21,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:21,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:21,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148807291] [2023-08-30 00:28:21,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148807291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:21,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:21,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:28:21,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265794383] [2023-08-30 00:28:21,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:21,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:28:21,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:28:21,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:28:22,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 00:28:22,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 199 transitions, 2321 flow. Second operand has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:22,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:22,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 00:28:22,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:28,826 INFO L130 PetriNetUnfolder]: 20758/38486 cut-off events. [2023-08-30 00:28:28,826 INFO L131 PetriNetUnfolder]: For 72944/73520 co-relation queries the response was YES. [2023-08-30 00:28:29,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148468 conditions, 38486 events. 20758/38486 cut-off events. For 72944/73520 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 351888 event pairs, 1994 based on Foata normal form. 1026/39212 useless extension candidates. Maximal degree in co-relation 148401. Up to 30534 conditions per place. [2023-08-30 00:28:29,369 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 148 selfloop transitions, 64 changer transitions 0/217 dead transitions. [2023-08-30 00:28:29,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 217 transitions, 2829 flow [2023-08-30 00:28:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:28:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:28:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2023-08-30 00:28:29,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983050847457627 [2023-08-30 00:28:29,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2023-08-30 00:28:29,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2023-08-30 00:28:29,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:29,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2023-08-30 00:28:29,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:29,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:29,374 INFO L175 Difference]: Start difference. First operand has 167 places, 199 transitions, 2321 flow. Second operand 6 states and 987 transitions. [2023-08-30 00:28:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 217 transitions, 2829 flow [2023-08-30 00:28:30,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 217 transitions, 2827 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 00:28:30,809 INFO L231 Difference]: Finished difference. Result has 175 places, 207 transitions, 2561 flow [2023-08-30 00:28:30,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2561, PETRI_PLACES=175, PETRI_TRANSITIONS=207} [2023-08-30 00:28:30,809 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2023-08-30 00:28:30,809 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 207 transitions, 2561 flow [2023-08-30 00:28:30,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:30,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:30,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:30,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:31,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:31,011 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:28:31,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:31,011 INFO L85 PathProgramCache]: Analyzing trace with hash 177946782, now seen corresponding path program 2 times [2023-08-30 00:28:31,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:31,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989775331] [2023-08-30 00:28:31,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:28:31,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:31,012 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:31,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:28:31,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:28:31,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:31,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:28:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:28:31,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:31,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989775331] [2023-08-30 00:28:31,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989775331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:31,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:31,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:28:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920099229] [2023-08-30 00:28:31,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:28:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:28:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:28:31,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 413 [2023-08-30 00:28:31,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 207 transitions, 2561 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:31,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:31,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 413 [2023-08-30 00:28:31,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:40,009 INFO L130 PetriNetUnfolder]: 31516/55966 cut-off events. [2023-08-30 00:28:40,010 INFO L131 PetriNetUnfolder]: For 166806/167412 co-relation queries the response was YES. [2023-08-30 00:28:40,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224442 conditions, 55966 events. 31516/55966 cut-off events. For 166806/167412 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 510713 event pairs, 9015 based on Foata normal form. 838/56549 useless extension candidates. Maximal degree in co-relation 224370. Up to 26980 conditions per place. [2023-08-30 00:28:40,894 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 264 selfloop transitions, 2 changer transitions 2/273 dead transitions. [2023-08-30 00:28:40,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 273 transitions, 3825 flow [2023-08-30 00:28:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:28:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:28:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 00:28:40,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519774011299435 [2023-08-30 00:28:40,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 00:28:40,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 00:28:40,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:40,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 00:28:40,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:40,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:40,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:40,898 INFO L175 Difference]: Start difference. First operand has 175 places, 207 transitions, 2561 flow. Second operand 3 states and 560 transitions. [2023-08-30 00:28:40,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 273 transitions, 3825 flow [2023-08-30 00:28:43,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 273 transitions, 3823 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 00:28:43,238 INFO L231 Difference]: Finished difference. Result has 178 places, 207 transitions, 2558 flow [2023-08-30 00:28:43,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2558, PETRI_PLACES=178, PETRI_TRANSITIONS=207} [2023-08-30 00:28:43,238 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 128 predicate places. [2023-08-30 00:28:43,239 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 207 transitions, 2558 flow [2023-08-30 00:28:43,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:43,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:43,239 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:43,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:43,439 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:28:43,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash -111170933, now seen corresponding path program 1 times [2023-08-30 00:28:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793227505] [2023-08-30 00:28:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:43,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:43,442 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:43,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:28:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:28:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:43,613 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 8 treesize of output 7 [2023-08-30 00:28:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:28:44,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:46,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793227505] [2023-08-30 00:28:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793227505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:46,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:46,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2023-08-30 00:28:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633799346] [2023-08-30 00:28:46,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:46,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:28:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:28:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:29:01,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 413 [2023-08-30 00:29:01,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 207 transitions, 2558 flow. Second operand has 21 states, 21 states have (on average 149.66666666666666) internal successors, (3143), 21 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:01,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:01,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 413 [2023-08-30 00:29:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:10,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:29:26,170 INFO L130 PetriNetUnfolder]: 32072/57073 cut-off events. [2023-08-30 00:29:26,170 INFO L131 PetriNetUnfolder]: For 152875/154460 co-relation queries the response was YES. [2023-08-30 00:29:26,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244044 conditions, 57073 events. 32072/57073 cut-off events. For 152875/154460 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 520489 event pairs, 4089 based on Foata normal form. 1459/58180 useless extension candidates. Maximal degree in co-relation 243969. Up to 20333 conditions per place. [2023-08-30 00:29:27,272 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 260 selfloop transitions, 155 changer transitions 0/420 dead transitions. [2023-08-30 00:29:27,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 420 transitions, 4515 flow [2023-08-30 00:29:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:29:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:29:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4083 transitions. [2023-08-30 00:29:27,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38023840566213446 [2023-08-30 00:29:27,278 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4083 transitions. [2023-08-30 00:29:27,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4083 transitions. [2023-08-30 00:29:27,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:29:27,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4083 transitions. [2023-08-30 00:29:27,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 157.03846153846155) internal successors, (4083), 26 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:27,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:27,292 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:27,292 INFO L175 Difference]: Start difference. First operand has 178 places, 207 transitions, 2558 flow. Second operand 26 states and 4083 transitions. [2023-08-30 00:29:27,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 420 transitions, 4515 flow [2023-08-30 00:29:29,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 420 transitions, 4494 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:29:29,951 INFO L231 Difference]: Finished difference. Result has 204 places, 224 transitions, 3121 flow [2023-08-30 00:29:29,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3121, PETRI_PLACES=204, PETRI_TRANSITIONS=224} [2023-08-30 00:29:29,952 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2023-08-30 00:29:29,952 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 224 transitions, 3121 flow [2023-08-30 00:29:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.66666666666666) internal successors, (3143), 21 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:29,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:29:29,952 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:29:29,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:29:30,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:30,153 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:29:30,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:29:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1152749730, now seen corresponding path program 2 times [2023-08-30 00:29:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:29:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583068127] [2023-08-30 00:29:30,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:29:30,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:29:30,155 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:29:30,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 00:29:30,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:29:30,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:29:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:29:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:29:30,325 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 8 treesize of output 7 [2023-08-30 00:29:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:29:31,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:29:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:29:33,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:29:33,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583068127] [2023-08-30 00:29:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583068127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:29:33,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:29:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:29:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644753557] [2023-08-30 00:29:33,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:29:33,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:29:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:29:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:29:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:29:50,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 413 [2023-08-30 00:29:50,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 224 transitions, 3121 flow. Second operand has 24 states, 24 states have (on average 150.5) internal successors, (3612), 24 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:50,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:50,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 413 [2023-08-30 00:29:50,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:58,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:30:00,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:30:02,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:30:06,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:30:07,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:30:11,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:30:17,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:30:19,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:30:22,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:30:39,544 INFO L130 PetriNetUnfolder]: 68492/117685 cut-off events. [2023-08-30 00:30:39,544 INFO L131 PetriNetUnfolder]: For 442041/445378 co-relation queries the response was YES. [2023-08-30 00:30:41,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559601 conditions, 117685 events. 68492/117685 cut-off events. For 442041/445378 co-relation queries the response was YES. Maximal size of possible extension queue 2387. Compared 1077383 event pairs, 5841 based on Foata normal form. 11218/128557 useless extension candidates. Maximal degree in co-relation 559523. Up to 26092 conditions per place. [2023-08-30 00:30:41,822 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 283 selfloop transitions, 170 changer transitions 0/458 dead transitions. [2023-08-30 00:30:41,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 458 transitions, 5700 flow [2023-08-30 00:30:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:30:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:30:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3963 transitions. [2023-08-30 00:30:41,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838256658595642 [2023-08-30 00:30:41,830 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3963 transitions. [2023-08-30 00:30:41,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3963 transitions. [2023-08-30 00:30:41,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:41,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3963 transitions. [2023-08-30 00:30:41,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 158.52) internal successors, (3963), 25 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:41,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 413.0) internal successors, (10738), 26 states have internal predecessors, (10738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:41,843 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 413.0) internal successors, (10738), 26 states have internal predecessors, (10738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:41,844 INFO L175 Difference]: Start difference. First operand has 204 places, 224 transitions, 3121 flow. Second operand 25 states and 3963 transitions. [2023-08-30 00:30:41,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 458 transitions, 5700 flow [2023-08-30 00:30:48,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 458 transitions, 5419 flow, removed 4 selfloop flow, removed 16 redundant places. [2023-08-30 00:30:48,318 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3969 flow [2023-08-30 00:30:48,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3969, PETRI_PLACES=223, PETRI_TRANSITIONS=262} [2023-08-30 00:30:48,319 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2023-08-30 00:30:48,319 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3969 flow [2023-08-30 00:30:48,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 150.5) internal successors, (3612), 24 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:48,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:30:48,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:30:48,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:30:48,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:30:48,521 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:30:48,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:30:48,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1110539665, now seen corresponding path program 1 times [2023-08-30 00:30:48,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:30:48,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283447004] [2023-08-30 00:30:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:30:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:30:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:30:48,522 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:30:48,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 00:30:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:30:48,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:30:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:30:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:30:48,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:30:48,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:30:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283447004] [2023-08-30 00:30:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283447004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:30:48,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:30:48,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:30:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680301906] [2023-08-30 00:30:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:30:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:30:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:30:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:30:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:30:48,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 413 [2023-08-30 00:30:48,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 262 transitions, 3969 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:48,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:30:48,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 413 [2023-08-30 00:30:48,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:31:17,019 INFO L130 PetriNetUnfolder]: 79160/140007 cut-off events. [2023-08-30 00:31:17,019 INFO L131 PetriNetUnfolder]: For 675117/678771 co-relation queries the response was YES. [2023-08-30 00:31:19,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750585 conditions, 140007 events. 79160/140007 cut-off events. For 675117/678771 co-relation queries the response was YES. Maximal size of possible extension queue 3209. Compared 1375974 event pairs, 26023 based on Foata normal form. 7896/147693 useless extension candidates. Maximal degree in co-relation 750496. Up to 100663 conditions per place. [2023-08-30 00:31:19,979 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 312 selfloop transitions, 4 changer transitions 5/326 dead transitions. [2023-08-30 00:31:19,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 326 transitions, 5573 flow [2023-08-30 00:31:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:31:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:31:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-30 00:31:19,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487489911218725 [2023-08-30 00:31:19,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-30 00:31:19,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-30 00:31:19,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:31:19,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-30 00:31:19,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:19,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:19,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:19,982 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3969 flow. Second operand 3 states and 556 transitions. [2023-08-30 00:31:19,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 326 transitions, 5573 flow [2023-08-30 00:31:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 326 transitions, 5307 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-08-30 00:31:34,022 INFO L231 Difference]: Finished difference. Result has 215 places, 261 transitions, 3734 flow [2023-08-30 00:31:34,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3734, PETRI_PLACES=215, PETRI_TRANSITIONS=261} [2023-08-30 00:31:34,023 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2023-08-30 00:31:34,023 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 261 transitions, 3734 flow [2023-08-30 00:31:34,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:34,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:31:34,023 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 00:31:34,032 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 00:31:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:34,230 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:31:34,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:31:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1173020621, now seen corresponding path program 3 times [2023-08-30 00:31:34,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:31:34,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374461324] [2023-08-30 00:31:34,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:31:34,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:34,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:31:34,231 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:31:34,232 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 (29)] Waiting until timeout for monitored process [2023-08-30 00:31:34,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:31:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:31:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:31:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:31:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:31:34,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 00:31:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:31:34,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 00:31:34,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2023-08-30 00:31:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 00:31:34,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:31:34,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:31:34,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374461324] [2023-08-30 00:31:34,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374461324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:31:34,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:31:34,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 00:31:34,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146610801] [2023-08-30 00:31:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:31:34,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:31:34,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:31:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:31:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:31:36,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-08-30 00:31:36,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 261 transitions, 3734 flow. Second operand has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:36,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:31:36,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-08-30 00:31:36,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:31:59,714 INFO L130 PetriNetUnfolder]: 62313/106392 cut-off events. [2023-08-30 00:31:59,714 INFO L131 PetriNetUnfolder]: For 537818/541022 co-relation queries the response was YES. [2023-08-30 00:32:01,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563979 conditions, 106392 events. 62313/106392 cut-off events. For 537818/541022 co-relation queries the response was YES. Maximal size of possible extension queue 2193. Compared 952464 event pairs, 15531 based on Foata normal form. 3474/109503 useless extension candidates. Maximal degree in co-relation 563889. Up to 95836 conditions per place. [2023-08-30 00:32:01,931 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 199 selfloop transitions, 60 changer transitions 0/264 dead transitions. [2023-08-30 00:32:01,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 264 transitions, 4207 flow [2023-08-30 00:32:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:32:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:32:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 813 transitions. [2023-08-30 00:32:01,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3937046004842615 [2023-08-30 00:32:01,934 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 813 transitions. [2023-08-30 00:32:01,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 813 transitions. [2023-08-30 00:32:01,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:32:01,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 813 transitions. [2023-08-30 00:32:01,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:01,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:01,938 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:01,938 INFO L175 Difference]: Start difference. First operand has 215 places, 261 transitions, 3734 flow. Second operand 5 states and 813 transitions. [2023-08-30 00:32:01,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 264 transitions, 4207 flow [2023-08-30 00:32:10,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 264 transitions, 4199 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:32:10,601 INFO L231 Difference]: Finished difference. Result has 218 places, 255 transitions, 3763 flow [2023-08-30 00:32:10,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=3643, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3763, PETRI_PLACES=218, PETRI_TRANSITIONS=255} [2023-08-30 00:32:10,606 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2023-08-30 00:32:10,607 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 255 transitions, 3763 flow [2023-08-30 00:32:10,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:10,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:32:10,607 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 1, 1, 1] [2023-08-30 00:32:10,616 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:32:10,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:10,814 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:32:10,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:32:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -60607878, now seen corresponding path program 2 times [2023-08-30 00:32:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:32:10,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663395797] [2023-08-30 00:32:10,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:32:10,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:32:10,816 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:32:10,816 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 (30)] Waiting until timeout for monitored process [2023-08-30 00:32:10,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:32:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:32:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 00:32:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:32:10,994 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 8 treesize of output 7 [2023-08-30 00:32:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:32:12,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:32:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:32:20,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:32:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663395797] [2023-08-30 00:32:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663395797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:32:20,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:32:20,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-08-30 00:32:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147035919] [2023-08-30 00:32:20,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:32:20,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 00:32:20,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:32:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 00:32:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 00:33:43,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:33:43,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 255 transitions, 3763 flow. Second operand has 40 states, 40 states have (on average 160.025) internal successors, (6401), 40 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:43,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:43,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:33:43,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:06,442 WARN L222 SmtUtils]: Spent 11.82s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:34:09,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:11,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:13,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:15,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:17,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:19,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:21,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:23,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:25,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:27,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:29,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:31,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:33,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:35,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:37,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:39,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:41,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:43,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:34:52,299 WARN L222 SmtUtils]: Spent 7.76s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:35:01,175 WARN L222 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:35:08,624 WARN L222 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15