./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-4.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/unroll-4.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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --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 01:20:59,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:20:59,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:20:59,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:20:59,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:20:59,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:20:59,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:20:59,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:20:59,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:20:59,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:20:59,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:20:59,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:20:59,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:20:59,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:20:59,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:20:59,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:20:59,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:20:59,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:20:59,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:20:59,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:20:59,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:20:59,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:20:59,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:20:59,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:20:59,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:20:59,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:20:59,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:20:59,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:20:59,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:20:59,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:20:59,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:20:59,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:20:59,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:20:59,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:20:59,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:20:59,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:20:59,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:20:59,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:20:59,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:20:59,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:20:59,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:20:59,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:20:59,275 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:20:59,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:20:59,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:20:59,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:20:59,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:20:59,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:20:59,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:20:59,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:20:59,277 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:20:59,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:20:59,278 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:20:59,278 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:20:59,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:20:59,279 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:20:59,280 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:20:59,280 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:20:59,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:20:59,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:20:59,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:20:59,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:20:59,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:20:59,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:20:59,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:20:59,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:20:59,281 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:20:59,281 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:20:59,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:20:59,282 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:20:59,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:20:59,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:20:59,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:20:59,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:20:59,523 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:20:59,523 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:20:59,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-30 01:21:00,519 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:21:00,666 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:21:00,667 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-30 01:21:00,677 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae958ab7/fad2d4abc2c14a0b8bb0854c65eb93b8/FLAGe1cb57091 [2023-08-30 01:21:00,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae958ab7/fad2d4abc2c14a0b8bb0854c65eb93b8 [2023-08-30 01:21:00,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:21:00,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:21:00,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:00,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:21:00,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:21:00,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:00" (1/1) ... [2023-08-30 01:21:00,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b793c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:00, skipping insertion in model container [2023-08-30 01:21:00,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:00" (1/1) ... [2023-08-30 01:21:00,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:21:00,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:21:00,867 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/unroll-4.wvr.c[2572,2585] [2023-08-30 01:21:00,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:00,885 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 01:21:00,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6450a4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:00, skipping insertion in model container [2023-08-30 01:21:00,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:00,887 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:21:00,888 INFO L158 Benchmark]: Toolchain (without parser) took 188.50ms. Allocated memory is still 71.3MB. Free memory was 45.4MB in the beginning and 35.7MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:21:00,888 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 71.3MB. Free memory is still 49.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:21:00,889 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.07ms. Allocated memory is still 71.3MB. Free memory was 45.2MB in the beginning and 35.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:21:00,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 71.3MB. Free memory is still 49.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.07ms. Allocated memory is still 71.3MB. Free memory was 45.2MB in the beginning and 35.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: 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/unroll-4.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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --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 01:21:02,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:21:02,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:21:02,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:21:02,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:21:02,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:21:02,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:21:02,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:21:02,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:21:02,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:21:02,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:21:02,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:21:02,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:21:02,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:21:02,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:21:02,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:21:02,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:21:02,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:21:02,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:21:02,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:21:02,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:21:02,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:21:02,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:21:02,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:21:02,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:21:02,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:21:02,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:21:02,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:21:02,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:21:02,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:21:02,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:21:02,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:21:02,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:21:02,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:21:02,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:21:02,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:21:02,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:21:02,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:21:02,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:21:02,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:21:02,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:21:02,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:21:02,250 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:21:02,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:21:02,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:21:02,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:21:02,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:21:02,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:21:02,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:21:02,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:21:02,252 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:21:02,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:21:02,253 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:21:02,253 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:21:02,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:21:02,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:21:02,254 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:21:02,255 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:21:02,255 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:21:02,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:21:02,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:21:02,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:21:02,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:21:02,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:21:02,256 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:21:02,257 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:21:02,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:21:02,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:21:02,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:21:02,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:21:02,496 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:21:02,497 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:21:02,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-30 01:21:03,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:21:03,614 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:21:03,615 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-30 01:21:03,622 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f96aa872/199dfd31dea74947819d8090691c704d/FLAGcb7fb0c81 [2023-08-30 01:21:03,640 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f96aa872/199dfd31dea74947819d8090691c704d [2023-08-30 01:21:03,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:21:03,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:21:03,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:03,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:21:03,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:21:03,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a83e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03, skipping insertion in model container [2023-08-30 01:21:03,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:21:03,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:21:03,763 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/unroll-4.wvr.c[2572,2585] [2023-08-30 01:21:03,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:03,776 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:21:03,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:21:03,786 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/unroll-4.wvr.c[2572,2585] [2023-08-30 01:21:03,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:03,795 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:21:03,814 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/unroll-4.wvr.c[2572,2585] [2023-08-30 01:21:03,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:03,831 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:21:03,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03 WrapperNode [2023-08-30 01:21:03,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:03,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:21:03,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:21:03,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:21:03,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,866 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2023-08-30 01:21:03,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:21:03,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:21:03,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:21:03,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:21:03,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:21:03,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:21:03,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:21:03,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:21:03,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (1/1) ... [2023-08-30 01:21:03,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:21:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:21:03,944 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 01:21:03,968 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 01:21:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:21:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:21:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:21:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:21:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:21:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:21:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:21:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:21:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:21:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:21:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:21:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:21:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:21:03,979 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 01:21:04,131 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:21:04,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:21:04,443 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:21:04,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:21:04,450 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 01:21:04,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:21:04 BoogieIcfgContainer [2023-08-30 01:21:04,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:21:04,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:21:04,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:21:04,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:21:04,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:21:03" (1/3) ... [2023-08-30 01:21:04,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b7ad80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:21:04, skipping insertion in model container [2023-08-30 01:21:04,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:03" (2/3) ... [2023-08-30 01:21:04,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b7ad80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:21:04, skipping insertion in model container [2023-08-30 01:21:04,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:21:04" (3/3) ... [2023-08-30 01:21:04,456 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-08-30 01:21:04,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:21:04,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 01:21:04,477 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:21:04,572 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:21:04,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 205 transitions, 426 flow [2023-08-30 01:21:04,682 INFO L130 PetriNetUnfolder]: 16/203 cut-off events. [2023-08-30 01:21:04,682 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:21:04,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 203 events. 16/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 264 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 01:21:04,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 205 transitions, 426 flow [2023-08-30 01:21:04,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 199 transitions, 410 flow [2023-08-30 01:21:04,700 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:21:04,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 199 transitions, 410 flow [2023-08-30 01:21:04,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 199 transitions, 410 flow [2023-08-30 01:21:04,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 410 flow [2023-08-30 01:21:04,738 INFO L130 PetriNetUnfolder]: 16/199 cut-off events. [2023-08-30 01:21:04,738 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:21:04,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 16/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 249 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 01:21:04,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 4638 [2023-08-30 01:21:20,799 INFO L134 LiptonReduction]: Checked pairs total: 4495 [2023-08-30 01:21:20,799 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-08-30 01:21:20,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:21:20,821 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;@52ca4e20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:21:20,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-08-30 01:21:20,823 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:21:20,824 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:21:20,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:20,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:21:20,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:20,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash 26440, now seen corresponding path program 1 times [2023-08-30 01:21:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844928369] [2023-08-30 01:21:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:20,835 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 01:21:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:20,838 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 01:21:20,839 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 01:21:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:21:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:21,036 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:21,037 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 01:21:21,067 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 01:21:21,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:21,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844928369] [2023-08-30 01:21:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844928369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:21,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:21,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166967722] [2023-08-30 01:21:21,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:21,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:21,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:21,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 437 [2023-08-30 01:21:21,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:21,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 437 [2023-08-30 01:21:21,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:21,548 INFO L130 PetriNetUnfolder]: 527/749 cut-off events. [2023-08-30 01:21:21,548 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 01:21:21,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 749 events. 527/749 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3114 event pairs, 251 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 1302. Up to 742 conditions per place. [2023-08-30 01:21:21,555 INFO L137 encePairwiseOnDemand]: 427/437 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-30 01:21:21,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 152 flow [2023-08-30 01:21:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-08-30 01:21:21,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416475972540046 [2023-08-30 01:21:21,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-08-30 01:21:21,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-08-30 01:21:21,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:21,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-08-30 01:21:21,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,587 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 88 flow. Second operand 3 states and 579 transitions. [2023-08-30 01:21:21,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 152 flow [2023-08-30 01:21:21,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:21:21,594 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 90 flow [2023-08-30 01:21:21,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-30 01:21:21,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-30 01:21:21,598 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 90 flow [2023-08-30 01:21:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:21,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:21:21,611 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 01:21:21,806 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 01:21:21,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:21,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash 26439, now seen corresponding path program 1 times [2023-08-30 01:21:21,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:21,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319880700] [2023-08-30 01:21:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:21,809 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 01:21:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:21,810 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 01:21:21,812 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 (3)] Waiting until timeout for monitored process [2023-08-30 01:21:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:21:21,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:21,921 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:21:21,922 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 01:21:21,960 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 01:21:21,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:21,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319880700] [2023-08-30 01:21:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319880700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:21,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906813162] [2023-08-30 01:21:21,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:21,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:21,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:22,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 437 [2023-08-30 01:21:22,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:22,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 437 [2023-08-30 01:21:22,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:22,232 INFO L130 PetriNetUnfolder]: 527/747 cut-off events. [2023-08-30 01:21:22,232 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:21:22,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 747 events. 527/747 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3187 event pairs, 251 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 1495. Up to 741 conditions per place. [2023-08-30 01:21:22,235 INFO L137 encePairwiseOnDemand]: 435/437 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 01:21:22,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 152 flow [2023-08-30 01:21:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-30 01:21:22,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2023-08-30 01:21:22,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-30 01:21:22,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-30 01:21:22,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:22,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-30 01:21:22,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,241 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 90 flow. Second operand 3 states and 575 transitions. [2023-08-30 01:21:22,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 152 flow [2023-08-30 01:21:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 148 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:22,243 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 86 flow [2023-08-30 01:21:22,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-30 01:21:22,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-30 01:21:22,244 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 86 flow [2023-08-30 01:21:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:22,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:21:22,255 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 01:21:22,451 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 01:21:22,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:22,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash 822027, now seen corresponding path program 1 times [2023-08-30 01:21:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318809292] [2023-08-30 01:21:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:22,453 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 01:21:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:22,454 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 01:21:22,457 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 01:21:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:22,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:21:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:22,532 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:21:22,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-30 01:21:22,585 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 01:21:22,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:22,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318809292] [2023-08-30 01:21:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318809292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:22,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:22,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:22,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721432626] [2023-08-30 01:21:22,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:22,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:22,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:22,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:22,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 437 [2023-08-30 01:21:22,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:22,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 437 [2023-08-30 01:21:22,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:22,875 INFO L130 PetriNetUnfolder]: 398/577 cut-off events. [2023-08-30 01:21:22,875 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:21:22,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 577 events. 398/577 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 2390 event pairs, 189 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 1156. Up to 571 conditions per place. [2023-08-30 01:21:22,877 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 01:21:22,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 140 flow [2023-08-30 01:21:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2023-08-30 01:21:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43783371472158655 [2023-08-30 01:21:22,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2023-08-30 01:21:22,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2023-08-30 01:21:22,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:22,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2023-08-30 01:21:22,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,883 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 86 flow. Second operand 3 states and 574 transitions. [2023-08-30 01:21:22,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 140 flow [2023-08-30 01:21:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:22,884 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 81 flow [2023-08-30 01:21:22,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-30 01:21:22,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-30 01:21:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 81 flow [2023-08-30 01:21:22,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:22,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:21:22,894 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 01:21:23,091 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 01:21:23,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:23,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash 822026, now seen corresponding path program 1 times [2023-08-30 01:21:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:23,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558166218] [2023-08-30 01:21:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:23,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:23,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:23,094 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 01:21:23,096 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 01:21:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:21:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:21:23,194 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 01:21:23,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 01:21:23,203 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 01:21:23,273 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 01:21:23,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:23,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558166218] [2023-08-30 01:21:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558166218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:23,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301782200] [2023-08-30 01:21:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:23,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:23,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:23,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 437 [2023-08-30 01:21:23,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:23,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:23,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 437 [2023-08-30 01:21:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:23,548 INFO L130 PetriNetUnfolder]: 269/407 cut-off events. [2023-08-30 01:21:23,549 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:21:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 407 events. 269/407 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1629 event pairs, 127 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 815. Up to 401 conditions per place. [2023-08-30 01:21:23,551 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 01:21:23,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 131 flow [2023-08-30 01:21:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-08-30 01:21:23,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43630816170861936 [2023-08-30 01:21:23,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-08-30 01:21:23,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-08-30 01:21:23,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:23,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-08-30 01:21:23,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:23,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:23,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:23,556 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 81 flow. Second operand 3 states and 572 transitions. [2023-08-30 01:21:23,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 131 flow [2023-08-30 01:21:23,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:23,558 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2023-08-30 01:21:23,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 01:21:23,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-30 01:21:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2023-08-30 01:21:23,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:23,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:23,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:21:23,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:23,767 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 01:21:23,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:23,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash 821931, now seen corresponding path program 1 times [2023-08-30 01:21:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363654755] [2023-08-30 01:21:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:23,768 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 01:21:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:23,769 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 01:21:23,770 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 01:21:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:21:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:23,857 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:23,858 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 01:21:23,909 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 01:21:23,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:24,043 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 01:21:24,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:24,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363654755] [2023-08-30 01:21:24,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363654755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:24,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:24,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:21:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581470846] [2023-08-30 01:21:24,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:24,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:21:24,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:21:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:21:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2023-08-30 01:21:24,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:24,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:24,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2023-08-30 01:21:24,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:25,070 INFO L130 PetriNetUnfolder]: 539/815 cut-off events. [2023-08-30 01:21:25,070 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:21:25,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 815 events. 539/815 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3880 event pairs, 254 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 1637. Up to 400 conditions per place. [2023-08-30 01:21:25,073 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 50 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2023-08-30 01:21:25,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 264 flow [2023-08-30 01:21:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:21:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:21:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1116 transitions. [2023-08-30 01:21:25,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425629290617849 [2023-08-30 01:21:25,076 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1116 transitions. [2023-08-30 01:21:25,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1116 transitions. [2023-08-30 01:21:25,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:25,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1116 transitions. [2023-08-30 01:21:25,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,082 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 1116 transitions. [2023-08-30 01:21:25,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 264 flow [2023-08-30 01:21:25,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:25,084 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 133 flow [2023-08-30 01:21:25,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-30 01:21:25,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-30 01:21:25,085 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 133 flow [2023-08-30 01:21:25,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:25,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:21:25,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 01:21:25,292 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 01:21:25,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:25,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 789987107, now seen corresponding path program 1 times [2023-08-30 01:21:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:25,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690207258] [2023-08-30 01:21:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:25,293 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 01:21:25,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:25,294 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 01:21:25,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 01:21:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:21:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:25,410 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:25,410 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 01:21:25,538 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 01:21:25,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:25,668 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 01:21:25,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690207258] [2023-08-30 01:21:25,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690207258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:25,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:25,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:21:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042778751] [2023-08-30 01:21:25,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:25,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:21:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:21:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:21:26,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 437 [2023-08-30 01:21:26,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 133 flow. Second operand has 8 states, 8 states have (on average 173.25) internal successors, (1386), 8 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:26,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:26,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 437 [2023-08-30 01:21:26,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:26,661 INFO L130 PetriNetUnfolder]: 497/747 cut-off events. [2023-08-30 01:21:26,661 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 01:21:26,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 747 events. 497/747 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3428 event pairs, 234 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 1520. Up to 370 conditions per place. [2023-08-30 01:21:26,665 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 50 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-30 01:21:26,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 289 flow [2023-08-30 01:21:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:21:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:21:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 913 transitions. [2023-08-30 01:21:26,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41784897025171625 [2023-08-30 01:21:26,672 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 913 transitions. [2023-08-30 01:21:26,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 913 transitions. [2023-08-30 01:21:26,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:26,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 913 transitions. [2023-08-30 01:21:26,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:26,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:26,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:26,680 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 133 flow. Second operand 5 states and 913 transitions. [2023-08-30 01:21:26,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 289 flow [2023-08-30 01:21:26,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 281 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:26,683 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 127 flow [2023-08-30 01:21:26,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-30 01:21:26,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-30 01:21:26,686 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 127 flow [2023-08-30 01:21:26,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.25) internal successors, (1386), 8 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:26,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:26,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:21:26,695 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 01:21:26,892 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 01:21:26,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:26,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash 789987106, now seen corresponding path program 1 times [2023-08-30 01:21:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:26,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761789516] [2023-08-30 01:21:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:26,894 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 01:21:26,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:26,895 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 01:21:26,897 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 01:21:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:21:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:26,980 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 01:21:26,980 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 29 [2023-08-30 01:21:26,994 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 01:21:26,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:26,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:26,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761789516] [2023-08-30 01:21:26,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761789516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:26,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:26,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44278568] [2023-08-30 01:21:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:26,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:26,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2023-08-30 01:21:27,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:27,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:27,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2023-08-30 01:21:27,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:27,252 INFO L130 PetriNetUnfolder]: 455/679 cut-off events. [2023-08-30 01:21:27,252 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 01:21:27,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 679 events. 455/679 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3081 event pairs, 214 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 1383. Up to 667 conditions per place. [2023-08-30 01:21:27,255 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 01:21:27,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 31 transitions, 181 flow [2023-08-30 01:21:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-30 01:21:27,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263920671243326 [2023-08-30 01:21:27,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-30 01:21:27,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-30 01:21:27,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:27,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-30 01:21:27,258 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 01:21:27,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:27,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:27,260 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 127 flow. Second operand 3 states and 559 transitions. [2023-08-30 01:21:27,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 31 transitions, 181 flow [2023-08-30 01:21:27,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 01:21:27,263 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 120 flow [2023-08-30 01:21:27,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-30 01:21:27,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-30 01:21:27,264 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 120 flow [2023-08-30 01:21:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:27,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:27,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:21:27,273 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 01:21:27,471 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 01:21:27,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:27,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1280210086, now seen corresponding path program 1 times [2023-08-30 01:21:27,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:27,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173924063] [2023-08-30 01:21:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:27,472 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 01:21:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:27,473 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 01:21:27,475 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 01:21:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:21:27,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:27,566 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 01:21:27,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:27,665 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 35 treesize of output 31 [2023-08-30 01:21:27,731 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 01:21:27,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173924063] [2023-08-30 01:21:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173924063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:27,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:27,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:21:27,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416288247] [2023-08-30 01:21:27,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:27,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:21:27,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:21:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:21:28,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 437 [2023-08-30 01:21:28,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 174.25) internal successors, (1394), 8 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:28,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:28,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 437 [2023-08-30 01:21:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:29,355 INFO L130 PetriNetUnfolder]: 601/935 cut-off events. [2023-08-30 01:21:29,355 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 01:21:29,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 935 events. 601/935 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4901 event pairs, 134 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1902. Up to 575 conditions per place. [2023-08-30 01:21:29,358 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 56 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2023-08-30 01:21:29,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 67 transitions, 335 flow [2023-08-30 01:21:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:21:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:21:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1274 transitions. [2023-08-30 01:21:29,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41647597254004576 [2023-08-30 01:21:29,362 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1274 transitions. [2023-08-30 01:21:29,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1274 transitions. [2023-08-30 01:21:29,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:29,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1274 transitions. [2023-08-30 01:21:29,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:29,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:29,368 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:29,368 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 120 flow. Second operand 7 states and 1274 transitions. [2023-08-30 01:21:29,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 67 transitions, 335 flow [2023-08-30 01:21:29,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:29,369 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 161 flow [2023-08-30 01:21:29,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-30 01:21:29,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-08-30 01:21:29,370 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 161 flow [2023-08-30 01:21:29,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 174.25) internal successors, (1394), 8 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:29,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:29,370 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:21:29,377 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 (9)] Ended with exit code 0 [2023-08-30 01:21:29,577 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 01:21:29,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:29,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1281382392, now seen corresponding path program 2 times [2023-08-30 01:21:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636165541] [2023-08-30 01:21:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:21:29,579 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 01:21:29,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:29,580 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 01:21:29,584 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 01:21:29,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:21:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 01:21:29,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:29,690 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:29,691 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 01:21:29,808 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 01:21:29,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:30,215 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 01:21:30,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636165541] [2023-08-30 01:21:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636165541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:30,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:21:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824264111] [2023-08-30 01:21:30,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:30,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:21:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:21:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:21:33,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2023-08-30 01:21:33,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:33,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:33,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2023-08-30 01:21:33,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:36,389 INFO L130 PetriNetUnfolder]: 2468/3956 cut-off events. [2023-08-30 01:21:36,389 INFO L131 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2023-08-30 01:21:36,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 3956 events. 2468/3956 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25310 event pairs, 1503 based on Foata normal form. 6/2035 useless extension candidates. Maximal degree in co-relation 8752. Up to 450 conditions per place. [2023-08-30 01:21:36,402 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 191 selfloop transitions, 12 changer transitions 0/205 dead transitions. [2023-08-30 01:21:36,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 205 transitions, 1088 flow [2023-08-30 01:21:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:21:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:21:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2312 transitions. [2023-08-30 01:21:36,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440884820747521 [2023-08-30 01:21:36,417 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2312 transitions. [2023-08-30 01:21:36,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2312 transitions. [2023-08-30 01:21:36,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:36,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2312 transitions. [2023-08-30 01:21:36,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.66666666666666) internal successors, (2312), 12 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:36,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:36,428 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:36,428 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 161 flow. Second operand 12 states and 2312 transitions. [2023-08-30 01:21:36,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 205 transitions, 1088 flow [2023-08-30 01:21:36,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 205 transitions, 1074 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 01:21:36,433 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 250 flow [2023-08-30 01:21:36,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-30 01:21:36,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2023-08-30 01:21:36,434 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 250 flow [2023-08-30 01:21:36,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:36,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:36,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:21:36,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:36,642 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 01:21:36,642 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:36,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1280210087, now seen corresponding path program 1 times [2023-08-30 01:21:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:36,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146799833] [2023-08-30 01:21:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:36,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:36,644 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 01:21:36,647 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 01:21:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:36,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:21:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:36,726 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:21:36,726 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 01:21:36,739 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 01:21:36,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:36,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146799833] [2023-08-30 01:21:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146799833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:36,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:36,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:21:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161046363] [2023-08-30 01:21:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:21:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:21:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:21:36,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 437 [2023-08-30 01:21:36,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:36,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:36,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 437 [2023-08-30 01:21:36,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:37,293 INFO L130 PetriNetUnfolder]: 1667/2705 cut-off events. [2023-08-30 01:21:37,293 INFO L131 PetriNetUnfolder]: For 752/752 co-relation queries the response was YES. [2023-08-30 01:21:37,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 2705 events. 1667/2705 cut-off events. For 752/752 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16767 event pairs, 954 based on Foata normal form. 0/1616 useless extension candidates. Maximal degree in co-relation 6185. Up to 2647 conditions per place. [2023-08-30 01:21:37,305 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 31 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2023-08-30 01:21:37,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 320 flow [2023-08-30 01:21:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:21:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:21:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-08-30 01:21:37,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998855835240275 [2023-08-30 01:21:37,308 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-08-30 01:21:37,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-08-30 01:21:37,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:37,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-08-30 01:21:37,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:37,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:37,312 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:37,312 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 250 flow. Second operand 4 states and 699 transitions. [2023-08-30 01:21:37,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 320 flow [2023-08-30 01:21:37,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 39 transitions, 307 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 01:21:37,314 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 245 flow [2023-08-30 01:21:37,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-30 01:21:37,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2023-08-30 01:21:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 245 flow [2023-08-30 01:21:37,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:37,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:37,325 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 01:21:37,523 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 01:21:37,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:37,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1031806189, now seen corresponding path program 1 times [2023-08-30 01:21:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843145657] [2023-08-30 01:21:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:37,524 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 01:21:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:37,525 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 01:21:37,527 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 01:21:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:37,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:21:37,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:37,667 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:37,667 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 01:21:37,762 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 01:21:37,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:38,163 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 01:21:38,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843145657] [2023-08-30 01:21:38,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843145657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:38,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:38,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:21:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154691179] [2023-08-30 01:21:38,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:38,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:21:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:21:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:21:44,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 437 [2023-08-30 01:21:44,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:44,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:44,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 437 [2023-08-30 01:21:44,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:47,685 INFO L130 PetriNetUnfolder]: 1283/2129 cut-off events. [2023-08-30 01:21:47,685 INFO L131 PetriNetUnfolder]: For 670/670 co-relation queries the response was YES. [2023-08-30 01:21:47,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 2129 events. 1283/2129 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12386 event pairs, 726 based on Foata normal form. 21/1370 useless extension candidates. Maximal degree in co-relation 4866. Up to 1765 conditions per place. [2023-08-30 01:21:47,692 INFO L137 encePairwiseOnDemand]: 428/437 looper letters, 51 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-08-30 01:21:47,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 434 flow [2023-08-30 01:21:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:21:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:21:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1610 transitions. [2023-08-30 01:21:47,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2023-08-30 01:21:47,697 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1610 transitions. [2023-08-30 01:21:47,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1610 transitions. [2023-08-30 01:21:47,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:47,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1610 transitions. [2023-08-30 01:21:47,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.88888888888889) internal successors, (1610), 9 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:47,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 437.0) internal successors, (4370), 10 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:47,722 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 437.0) internal successors, (4370), 10 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:47,722 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 245 flow. Second operand 9 states and 1610 transitions. [2023-08-30 01:21:47,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 434 flow [2023-08-30 01:21:47,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 427 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:21:47,724 INFO L231 Difference]: Finished difference. Result has 69 places, 39 transitions, 283 flow [2023-08-30 01:21:47,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=69, PETRI_TRANSITIONS=39} [2023-08-30 01:21:47,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-08-30 01:21:47,725 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 39 transitions, 283 flow [2023-08-30 01:21:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:47,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:47,726 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:47,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 01:21:47,932 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 01:21:47,933 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:47,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 307956208, now seen corresponding path program 2 times [2023-08-30 01:21:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:47,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133559822] [2023-08-30 01:21:47,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:21:47,934 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 01:21:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:47,934 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 01:21:47,935 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 01:21:47,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:21:47,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:21:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:48,040 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:48,041 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 01:21:48,137 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 01:21:48,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:48,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:48,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133559822] [2023-08-30 01:21:48,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133559822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:48,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:21:48,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119100862] [2023-08-30 01:21:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:21:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:48,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:21:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:21:48,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2023-08-30 01:21:48,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 39 transitions, 283 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:48,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:48,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2023-08-30 01:21:48,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:48,602 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-08-30 01:21:48,602 INFO L131 PetriNetUnfolder]: For 960/960 co-relation queries the response was YES. [2023-08-30 01:21:48,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 977 events. 515/977 cut-off events. For 960/960 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5443 event pairs, 270 based on Foata normal form. 162/959 useless extension candidates. Maximal degree in co-relation 2247. Up to 919 conditions per place. [2023-08-30 01:21:48,605 INFO L137 encePairwiseOnDemand]: 430/437 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 01:21:48,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 313 flow [2023-08-30 01:21:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:21:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:21:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2023-08-30 01:21:48,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4193363844393593 [2023-08-30 01:21:48,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2023-08-30 01:21:48,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2023-08-30 01:21:48,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:48,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2023-08-30 01:21:48,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:48,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:48,611 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:48,611 INFO L175 Difference]: Start difference. First operand has 69 places, 39 transitions, 283 flow. Second operand 4 states and 733 transitions. [2023-08-30 01:21:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 313 flow [2023-08-30 01:21:48,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 34 transitions, 262 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-08-30 01:21:48,613 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 210 flow [2023-08-30 01:21:48,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-08-30 01:21:48,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-30 01:21:48,613 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 210 flow [2023-08-30 01:21:48,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:48,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:48,614 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:21:48,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-30 01:21:48,820 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 01:21:48,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:21:48,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash -969763544, now seen corresponding path program 3 times [2023-08-30 01:21:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781578848] [2023-08-30 01:21:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:21:48,821 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 01:21:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:48,822 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 01:21:48,823 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 01:21:48,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:21:48,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 01:21:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:49,005 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:49,005 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 01:21:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:21:49,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:21:51,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:51,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781578848] [2023-08-30 01:21:51,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781578848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:51,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:51,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:21:51,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747871562] [2023-08-30 01:21:51,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:51,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:21:51,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:51,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:21:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:22:05,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2023-08-30 01:22:05,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 210 flow. Second operand has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:05,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:05,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2023-08-30 01:22:05,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:19,341 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-08-30 01:22:19,341 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-08-30 01:22:19,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5062 conditions, 2273 events. 1199/2273 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13394 event pairs, 630 based on Foata normal form. 12/1865 useless extension candidates. Maximal degree in co-relation 5039. Up to 504 conditions per place. [2023-08-30 01:22:19,348 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-08-30 01:22:19,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 322 transitions, 1860 flow [2023-08-30 01:22:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 01:22:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 01:22:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4535 transitions. [2023-08-30 01:22:19,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43239893211289093 [2023-08-30 01:22:19,368 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4535 transitions. [2023-08-30 01:22:19,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4535 transitions. [2023-08-30 01:22:19,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:19,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4535 transitions. [2023-08-30 01:22:19,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 188.95833333333334) internal successors, (4535), 24 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 437.0) internal successors, (10925), 25 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,385 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 437.0) internal successors, (10925), 25 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,385 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 210 flow. Second operand 24 states and 4535 transitions. [2023-08-30 01:22:19,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 322 transitions, 1860 flow [2023-08-30 01:22:19,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 322 transitions, 1836 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:22:19,391 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 394 flow [2023-08-30 01:22:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=394, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2023-08-30 01:22:19,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2023-08-30 01:22:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 394 flow [2023-08-30 01:22:19,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:19,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:19,402 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 01:22:19,602 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 01:22:19,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:19,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:19,602 INFO L85 PathProgramCache]: Analyzing trace with hash -129771674, now seen corresponding path program 1 times [2023-08-30 01:22:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:19,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520137425] [2023-08-30 01:22:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:19,603 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 01:22:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:19,604 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 01:22:19,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 01:22:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:22:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:19,746 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 01:22:19,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:19,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520137425] [2023-08-30 01:22:19,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520137425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:19,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:19,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:22:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004320912] [2023-08-30 01:22:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:19,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:22:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:22:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:22:19,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 437 [2023-08-30 01:22:19,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 394 flow. Second operand has 3 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 01:22:19,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:19,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 437 [2023-08-30 01:22:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:20,161 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-08-30 01:22:20,161 INFO L131 PetriNetUnfolder]: For 613/613 co-relation queries the response was YES. [2023-08-30 01:22:20,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6228 conditions, 2756 events. 1493/2756 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16676 event pairs, 273 based on Foata normal form. 21/2273 useless extension candidates. Maximal degree in co-relation 6192. Up to 2101 conditions per place. [2023-08-30 01:22:20,168 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-08-30 01:22:20,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 58 transitions, 535 flow [2023-08-30 01:22:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:22:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:22:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-30 01:22:20,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43707093821510296 [2023-08-30 01:22:20,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-30 01:22:20,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-30 01:22:20,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:20,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-30 01:22:20,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,173 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 394 flow. Second operand 3 states and 573 transitions. [2023-08-30 01:22:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 58 transitions, 535 flow [2023-08-30 01:22:20,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 58 transitions, 511 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 01:22:20,177 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 400 flow [2023-08-30 01:22:20,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2023-08-30 01:22:20,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2023-08-30 01:22:20,178 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 400 flow [2023-08-30 01:22:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 01:22:20,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:20,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:20,185 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 01:22:20,385 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 01:22:20,385 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:20,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1813199920, now seen corresponding path program 1 times [2023-08-30 01:22:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:20,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921167842] [2023-08-30 01:22:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:20,386 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 01:22:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:20,387 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 01:22:20,387 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 01:22:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:20,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:22:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:20,510 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 01:22:20,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:20,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921167842] [2023-08-30 01:22:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921167842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:20,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:22:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525734587] [2023-08-30 01:22:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:22:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 437 [2023-08-30 01:22:20,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:20,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 437 [2023-08-30 01:22:20,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:20,939 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-08-30 01:22:20,939 INFO L131 PetriNetUnfolder]: For 1098/1098 co-relation queries the response was YES. [2023-08-30 01:22:20,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7169 conditions, 2827 events. 1463/2827 cut-off events. For 1098/1098 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 18108 event pairs, 420 based on Foata normal form. 160/2947 useless extension candidates. Maximal degree in co-relation 7131. Up to 1608 conditions per place. [2023-08-30 01:22:20,947 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 56 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2023-08-30 01:22:20,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 65 transitions, 569 flow [2023-08-30 01:22:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2023-08-30 01:22:20,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077803203661325 [2023-08-30 01:22:20,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2023-08-30 01:22:20,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2023-08-30 01:22:20,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:20,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2023-08-30 01:22:20,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,953 INFO L175 Difference]: Start difference. First operand has 82 places, 50 transitions, 400 flow. Second operand 4 states and 753 transitions. [2023-08-30 01:22:20,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 65 transitions, 569 flow [2023-08-30 01:22:20,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 65 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:20,958 INFO L231 Difference]: Finished difference. Result has 86 places, 51 transitions, 423 flow [2023-08-30 01:22:20,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=86, PETRI_TRANSITIONS=51} [2023-08-30 01:22:20,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-08-30 01:22:20,958 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 51 transitions, 423 flow [2023-08-30 01:22:20,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:20,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:20,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:20,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:22:21,166 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 01:22:21,166 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:21,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1087389879, now seen corresponding path program 1 times [2023-08-30 01:22:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681857853] [2023-08-30 01:22:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:21,167 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 01:22:21,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:21,168 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 01:22:21,169 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 01:22:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:22:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:21,278 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 01:22:21,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:21,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:21,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681857853] [2023-08-30 01:22:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681857853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:21,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:21,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:22:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837035749] [2023-08-30 01:22:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:22:21,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-08-30 01:22:21,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 51 transitions, 423 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:21,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:21,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-08-30 01:22:21,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:21,722 INFO L130 PetriNetUnfolder]: 1463/2867 cut-off events. [2023-08-30 01:22:21,723 INFO L131 PetriNetUnfolder]: For 2698/2898 co-relation queries the response was YES. [2023-08-30 01:22:21,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8631 conditions, 2867 events. 1463/2867 cut-off events. For 2698/2898 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17321 event pairs, 380 based on Foata normal form. 320/3147 useless extension candidates. Maximal degree in co-relation 8591. Up to 1760 conditions per place. [2023-08-30 01:22:21,732 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 56 selfloop transitions, 5 changer transitions 4/66 dead transitions. [2023-08-30 01:22:21,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 66 transitions, 599 flow [2023-08-30 01:22:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-08-30 01:22:21,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42505720823798626 [2023-08-30 01:22:21,734 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-08-30 01:22:21,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-08-30 01:22:21,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:21,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-08-30 01:22:21,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:21,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:21,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:21,738 INFO L175 Difference]: Start difference. First operand has 86 places, 51 transitions, 423 flow. Second operand 4 states and 743 transitions. [2023-08-30 01:22:21,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 66 transitions, 599 flow [2023-08-30 01:22:21,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 66 transitions, 586 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:21,742 INFO L231 Difference]: Finished difference. Result has 90 places, 53 transitions, 441 flow [2023-08-30 01:22:21,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=90, PETRI_TRANSITIONS=53} [2023-08-30 01:22:21,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-08-30 01:22:21,743 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 441 flow [2023-08-30 01:22:21,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:21,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:21,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:21,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:22:21,950 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 01:22:21,951 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:21,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash -984691997, now seen corresponding path program 2 times [2023-08-30 01:22:21,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:21,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528528902] [2023-08-30 01:22:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:22:21,951 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 01:22:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:21,952 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 01:22:21,953 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 01:22:22,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:22:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:22:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:22,052 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 01:22:22,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:22,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528528902] [2023-08-30 01:22:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528528902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:22,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:22:22,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591952856] [2023-08-30 01:22:22,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:22:22,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-08-30 01:22:22,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 53 transitions, 441 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:22,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:22,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-08-30 01:22:22,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:22,575 INFO L130 PetriNetUnfolder]: 1703/3387 cut-off events. [2023-08-30 01:22:22,575 INFO L131 PetriNetUnfolder]: For 4798/5018 co-relation queries the response was YES. [2023-08-30 01:22:22,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11013 conditions, 3387 events. 1703/3387 cut-off events. For 4798/5018 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 21960 event pairs, 580 based on Foata normal form. 300/3687 useless extension candidates. Maximal degree in co-relation 10971. Up to 2108 conditions per place. [2023-08-30 01:22:22,586 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 61 selfloop transitions, 6 changer transitions 2/70 dead transitions. [2023-08-30 01:22:22,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 70 transitions, 654 flow [2023-08-30 01:22:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-08-30 01:22:22,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276887871853547 [2023-08-30 01:22:22,588 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-08-30 01:22:22,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-08-30 01:22:22,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:22,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-08-30 01:22:22,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:22,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:22,591 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:22,591 INFO L175 Difference]: Start difference. First operand has 90 places, 53 transitions, 441 flow. Second operand 4 states and 739 transitions. [2023-08-30 01:22:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 70 transitions, 654 flow [2023-08-30 01:22:22,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 70 transitions, 643 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:22,607 INFO L231 Difference]: Finished difference. Result has 94 places, 55 transitions, 473 flow [2023-08-30 01:22:22,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=473, PETRI_PLACES=94, PETRI_TRANSITIONS=55} [2023-08-30 01:22:22,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2023-08-30 01:22:22,607 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 55 transitions, 473 flow [2023-08-30 01:22:22,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:22,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:22,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:22,615 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 01:22:22,815 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 01:22:22,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:22,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1632320708, now seen corresponding path program 2 times [2023-08-30 01:22:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:22,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635873098] [2023-08-30 01:22:22,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:22:22,816 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 01:22:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:22,816 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 01:22:22,817 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 01:22:22,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:22:22,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:22:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:22,947 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 01:22:22,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:22,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:22,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635873098] [2023-08-30 01:22:22,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635873098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:22,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:22,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:22:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073577987] [2023-08-30 01:22:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:22,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:22:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:22:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:22:22,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-08-30 01:22:22,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 55 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:22,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:22,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-08-30 01:22:22,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:23,646 INFO L130 PetriNetUnfolder]: 2363/4607 cut-off events. [2023-08-30 01:22:23,646 INFO L131 PetriNetUnfolder]: For 9918/9918 co-relation queries the response was YES. [2023-08-30 01:22:23,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 4607 events. 2363/4607 cut-off events. For 9918/9918 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 30179 event pairs, 720 based on Foata normal form. 80/4687 useless extension candidates. Maximal degree in co-relation 17271. Up to 2608 conditions per place. [2023-08-30 01:22:23,662 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 63 selfloop transitions, 12 changer transitions 6/81 dead transitions. [2023-08-30 01:22:23,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 81 transitions, 781 flow [2023-08-30 01:22:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:22:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:22:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 928 transitions. [2023-08-30 01:22:23,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247139588100686 [2023-08-30 01:22:23,664 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 928 transitions. [2023-08-30 01:22:23,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 928 transitions. [2023-08-30 01:22:23,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:23,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 928 transitions. [2023-08-30 01:22:23,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.6) internal successors, (928), 5 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:23,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:23,668 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:23,668 INFO L175 Difference]: Start difference. First operand has 94 places, 55 transitions, 473 flow. Second operand 5 states and 928 transitions. [2023-08-30 01:22:23,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 81 transitions, 781 flow [2023-08-30 01:22:23,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 81 transitions, 753 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:23,695 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 561 flow [2023-08-30 01:22:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=561, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2023-08-30 01:22:23,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2023-08-30 01:22:23,696 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 561 flow [2023-08-30 01:22:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:23,704 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 01:22:23,904 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 01:22:23,904 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:23,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1244738460, now seen corresponding path program 3 times [2023-08-30 01:22:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512786178] [2023-08-30 01:22:23,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:22:23,905 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 01:22:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:23,906 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 01:22:23,909 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 01:22:23,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:22:23,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:22:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:24,042 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 01:22:24,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:24,071 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 01:22:24,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:24,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512786178] [2023-08-30 01:22:24,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512786178] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:22:24,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:22:24,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-08-30 01:22:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742068533] [2023-08-30 01:22:24,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:24,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:24,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:22:24,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 437 [2023-08-30 01:22:24,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 561 flow. Second operand has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:24,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:24,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 437 [2023-08-30 01:22:24,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:24,796 INFO L130 PetriNetUnfolder]: 2183/4327 cut-off events. [2023-08-30 01:22:24,796 INFO L131 PetriNetUnfolder]: For 11878/12118 co-relation queries the response was YES. [2023-08-30 01:22:24,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 4327 events. 2183/4327 cut-off events. For 11878/12118 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 28761 event pairs, 780 based on Foata normal form. 300/4487 useless extension candidates. Maximal degree in co-relation 17031. Up to 2800 conditions per place. [2023-08-30 01:22:24,816 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 59 selfloop transitions, 9 changer transitions 5/76 dead transitions. [2023-08-30 01:22:24,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 779 flow [2023-08-30 01:22:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2023-08-30 01:22:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077803203661325 [2023-08-30 01:22:24,818 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2023-08-30 01:22:24,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2023-08-30 01:22:24,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:24,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2023-08-30 01:22:24,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:24,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:24,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:24,821 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 561 flow. Second operand 4 states and 753 transitions. [2023-08-30 01:22:24,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 779 flow [2023-08-30 01:22:24,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 76 transitions, 759 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:24,846 INFO L231 Difference]: Finished difference. Result has 104 places, 65 transitions, 604 flow [2023-08-30 01:22:24,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=604, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2023-08-30 01:22:24,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2023-08-30 01:22:24,847 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 604 flow [2023-08-30 01:22:24,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:24,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:24,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:24,855 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 01:22:25,055 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 01:22:25,055 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:25,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2028978141, now seen corresponding path program 3 times [2023-08-30 01:22:25,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:25,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207313692] [2023-08-30 01:22:25,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:22:25,056 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 01:22:25,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:25,057 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 01:22:25,057 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 01:22:25,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:22:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:25,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:22:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:25,169 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 01:22:25,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:25,206 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 01:22:25,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207313692] [2023-08-30 01:22:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207313692] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:25,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:25,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 01:22:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294572919] [2023-08-30 01:22:25,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:25,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:22:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:22:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:22:25,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 437 [2023-08-30 01:22:25,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 604 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:25,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:25,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 437 [2023-08-30 01:22:25,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:26,321 INFO L130 PetriNetUnfolder]: 3083/5847 cut-off events. [2023-08-30 01:22:26,321 INFO L131 PetriNetUnfolder]: For 19238/19918 co-relation queries the response was YES. [2023-08-30 01:22:26,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23720 conditions, 5847 events. 3083/5847 cut-off events. For 19238/19918 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 39772 event pairs, 580 based on Foata normal form. 1340/7107 useless extension candidates. Maximal degree in co-relation 23671. Up to 2148 conditions per place. [2023-08-30 01:22:26,341 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 76 selfloop transitions, 20 changer transitions 8/107 dead transitions. [2023-08-30 01:22:26,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 1049 flow [2023-08-30 01:22:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:22:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:22:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2023-08-30 01:22:26,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42922523700555737 [2023-08-30 01:22:26,343 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2023-08-30 01:22:26,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2023-08-30 01:22:26,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:26,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2023-08-30 01:22:26,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:26,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:26,347 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:26,347 INFO L175 Difference]: Start difference. First operand has 104 places, 65 transitions, 604 flow. Second operand 7 states and 1313 transitions. [2023-08-30 01:22:26,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 1049 flow [2023-08-30 01:22:26,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 1022 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:26,378 INFO L231 Difference]: Finished difference. Result has 113 places, 71 transitions, 726 flow [2023-08-30 01:22:26,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=113, PETRI_TRANSITIONS=71} [2023-08-30 01:22:26,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2023-08-30 01:22:26,379 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 71 transitions, 726 flow [2023-08-30 01:22:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:26,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:26,379 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:26,388 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 01:22:26,586 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 01:22:26,586 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:26,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1592113014, now seen corresponding path program 4 times [2023-08-30 01:22:26,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:26,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144044522] [2023-08-30 01:22:26,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:22:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:22:26,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:26,587 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 01:22:26,588 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 01:22:26,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:22:26,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:22:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:22:26,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:26,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:26,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144044522] [2023-08-30 01:22:26,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144044522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:26,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:26,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:22:26,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464066737] [2023-08-30 01:22:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:26,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:26,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:26,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:26,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:22:26,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-08-30 01:22:26,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 71 transitions, 726 flow. Second operand has 4 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 01:22:26,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:26,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-08-30 01:22:26,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:27,496 INFO L130 PetriNetUnfolder]: 3063/5387 cut-off events. [2023-08-30 01:22:27,497 INFO L131 PetriNetUnfolder]: For 26521/26721 co-relation queries the response was YES. [2023-08-30 01:22:27,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25204 conditions, 5387 events. 3063/5387 cut-off events. For 26521/26721 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 31755 event pairs, 1060 based on Foata normal form. 380/5727 useless extension candidates. Maximal degree in co-relation 25151. Up to 3788 conditions per place. [2023-08-30 01:22:27,521 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 70 selfloop transitions, 17 changer transitions 1/90 dead transitions. [2023-08-30 01:22:27,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 90 transitions, 1052 flow [2023-08-30 01:22:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-08-30 01:22:27,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276887871853547 [2023-08-30 01:22:27,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-08-30 01:22:27,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-08-30 01:22:27,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:27,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-08-30 01:22:27,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:27,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:27,525 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:27,525 INFO L175 Difference]: Start difference. First operand has 113 places, 71 transitions, 726 flow. Second operand 4 states and 739 transitions. [2023-08-30 01:22:27,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 90 transitions, 1052 flow [2023-08-30 01:22:27,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 90 transitions, 964 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-30 01:22:27,569 INFO L231 Difference]: Finished difference. Result has 114 places, 77 transitions, 790 flow [2023-08-30 01:22:27,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=790, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2023-08-30 01:22:27,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2023-08-30 01:22:27,569 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 790 flow [2023-08-30 01:22:27,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 01:22:27,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:27,569 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:27,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-08-30 01:22:27,770 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 01:22:27,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 01:22:27,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash -143240644, now seen corresponding path program 1 times [2023-08-30 01:22:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:27,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752950667] [2023-08-30 01:22:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:27,770 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 01:22:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:27,771 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 01:22:27,772 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 01:22:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 01:22:27,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:28,443 INFO L321 Elim1Store]: treesize reduction 568, result has 4.2 percent of original size [2023-08-30 01:22:28,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 838 treesize of output 152 [2023-08-30 01:22:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:28,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:58,678 WARN L222 SmtUtils]: Spent 29.56s on a formula simplification. DAG size of input: 1527 DAG size of output: 354 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 01:22:58,681 INFO L321 Elim1Store]: treesize reduction 2999, result has 20.6 percent of original size [2023-08-30 01:22:58,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 28 select indices, 28 select index equivalence classes, 0 disjoint index pairs (out of 378 index pairs), introduced 48 new quantified variables, introduced 378 case distinctions, treesize of input 4440 treesize of output 1108 [2023-08-30 01:26:50,035 WARN L222 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 5715 DAG size of output: 5752 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:28:47,025 WARN L222 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 5687 DAG size of output: 5791 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:28:56,520 WARN L222 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 5638 DAG size of output: 5751 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:29:05,622 WARN L222 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 5565 DAG size of output: 5641 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:30:30,220 WARN L222 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 5365 DAG size of output: 5386 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15