./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:14:19,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:14:19,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:14:19,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:14:19,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:14:19,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:14:19,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:14:19,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:14:19,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:14:19,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:14:19,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:14:19,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:14:19,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:14:19,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:14:19,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:14:19,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:14:19,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:14:19,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:14:19,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:14:19,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:14:19,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:14:19,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:14:19,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:14:19,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:14:19,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:14:19,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:14:19,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:14:19,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:14:19,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:14:19,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:14:19,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:14:19,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:14:19,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:14:19,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:14:19,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:14:19,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:14:19,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:14:19,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:14:19,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:14:19,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:14:19,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:14:19,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:14:19,211 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:14:19,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:14:19,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:14:19,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:14:19,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:14:19,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:14:19,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:14:19,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:14:19,215 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:14:19,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:14:19,216 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:14:19,216 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:14:19,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:14:19,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:14:19,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:14:19,217 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:14:19,217 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:14:19,217 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:14:19,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:14:19,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:14:19,217 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:14:19,218 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:14:19,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:14:19,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:14:19,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:14:19,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:14:19,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:14:19,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:14:19,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:14:19,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:14:19,219 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:14:19,219 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:14:19,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:14:19,220 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:14:19,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:14:19,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:14:19,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:14:19,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:14:19,549 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:14:19,549 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:14:19,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-09-01 04:14:20,698 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:14:20,888 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:14:20,889 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-09-01 04:14:20,894 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30d17919/d9c08dfbade34c5ba08f53be71850ae3/FLAG9c2b70804 [2023-09-01 04:14:20,912 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30d17919/d9c08dfbade34c5ba08f53be71850ae3 [2023-09-01 04:14:20,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:14:20,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:14:20,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:14:20,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:14:20,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:14:20,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:14:20" (1/1) ... [2023-09-01 04:14:20,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1f320f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:20, skipping insertion in model container [2023-09-01 04:14:20,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:14:20" (1/1) ... [2023-09-01 04:14:20,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:14:20,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:14:21,148 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-5.wvr.c[2644,2657] [2023-09-01 04:14:21,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:14:21,176 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 04:14:21,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@71c4c43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:21, skipping insertion in model container [2023-09-01 04:14:21,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:14:21,179 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:14:21,180 INFO L158 Benchmark]: Toolchain (without parser) took 265.06ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 34.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:14:21,181 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:14:21,182 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.43ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 34.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:14:21,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.43ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 34.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: 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-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:14:22,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:14:22,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:14:22,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:14:22,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:14:22,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:14:22,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:14:22,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:14:22,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:14:22,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:14:22,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:14:22,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:14:22,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:14:22,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:14:22,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:14:22,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:14:22,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:14:22,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:14:22,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:14:22,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:14:22,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:14:23,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:14:23,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:14:23,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:14:23,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:14:23,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:14:23,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:14:23,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:14:23,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:14:23,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:14:23,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:14:23,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:14:23,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:14:23,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:14:23,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:14:23,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:14:23,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:14:23,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:14:23,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:14:23,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:14:23,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:14:23,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:14:23,051 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:14:23,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:14:23,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:14:23,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:14:23,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:14:23,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:14:23,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:14:23,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:14:23,055 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:14:23,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:14:23,055 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:14:23,056 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:14:23,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:14:23,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:14:23,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:14:23,056 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:14:23,057 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:14:23,057 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:14:23,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:14:23,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:14:23,057 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:14:23,057 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:14:23,058 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:14:23,058 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:14:23,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:14:23,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:14:23,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:14:23,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:14:23,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:14:23,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:14:23,059 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:14:23,059 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:14:23,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:14:23,060 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:14:23,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:14:23,060 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:14:23,060 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:14:23,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:14:23,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:14:23,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:14:23,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:14:23,391 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:14:23,392 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:14:23,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-09-01 04:14:24,656 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:14:24,839 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:14:24,840 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-09-01 04:14:24,848 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacc8e314/d5a1cd3af7ab4cb4a8cbb8bf4462a68a/FLAGdbe5c31cd [2023-09-01 04:14:24,860 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacc8e314/d5a1cd3af7ab4cb4a8cbb8bf4462a68a [2023-09-01 04:14:24,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:14:24,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:14:24,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:14:24,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:14:24,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:14:24,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:14:24" (1/1) ... [2023-09-01 04:14:24,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e03bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:24, skipping insertion in model container [2023-09-01 04:14:24,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:14:24" (1/1) ... [2023-09-01 04:14:24,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:14:24,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:14:25,040 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-5.wvr.c[2644,2657] [2023-09-01 04:14:25,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:14:25,059 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:14:25,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:14:25,076 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-5.wvr.c[2644,2657] [2023-09-01 04:14:25,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:14:25,089 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:14:25,109 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-5.wvr.c[2644,2657] [2023-09-01 04:14:25,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:14:25,125 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:14:25,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25 WrapperNode [2023-09-01 04:14:25,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:14:25,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:14:25,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:14:25,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:14:25,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,163 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 165 [2023-09-01 04:14:25,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:14:25,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:14:25,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:14:25,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:14:25,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,208 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:14:25,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:14:25,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:14:25,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:14:25,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (1/1) ... [2023-09-01 04:14:25,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:14:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:14:25,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:14:25,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:14:25,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:14:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:14:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:14:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:14:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:14:25,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:14:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:14:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:14:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:14:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:14:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:14:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:14:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:14:25,299 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:14:25,393 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:14:25,399 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:14:25,938 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:14:25,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:14:25,946 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:14:25,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:14:25 BoogieIcfgContainer [2023-09-01 04:14:25,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:14:25,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:14:25,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:14:25,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:14:25,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:14:24" (1/3) ... [2023-09-01 04:14:25,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60958d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:14:25, skipping insertion in model container [2023-09-01 04:14:25,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:14:25" (2/3) ... [2023-09-01 04:14:25,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60958d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:14:25, skipping insertion in model container [2023-09-01 04:14:25,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:14:25" (3/3) ... [2023-09-01 04:14:25,955 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-09-01 04:14:25,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:14:25,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-09-01 04:14:25,975 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:14:26,120 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:14:26,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2023-09-01 04:14:26,277 INFO L130 PetriNetUnfolder]: 17/218 cut-off events. [2023-09-01 04:14:26,278 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:14:26,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 275 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-09-01 04:14:26,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2023-09-01 04:14:26,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 214 transitions, 440 flow [2023-09-01 04:14:26,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:14:26,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 214 transitions, 440 flow [2023-09-01 04:14:26,314 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 214 transitions, 440 flow [2023-09-01 04:14:26,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 214 transitions, 440 flow [2023-09-01 04:14:26,361 INFO L130 PetriNetUnfolder]: 17/214 cut-off events. [2023-09-01 04:14:26,362 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:14:26,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 17/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-09-01 04:14:26,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 5568 [2023-09-01 04:14:53,341 INFO L134 LiptonReduction]: Checked pairs total: 5474 [2023-09-01 04:14:53,342 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-09-01 04:14:53,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:14:53,359 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;@5eea815f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:14:53,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-09-01 04:14:53,362 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:14:53,362 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:14:53,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:53,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:14:53,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:14:53,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:53,367 INFO L85 PathProgramCache]: Analyzing trace with hash 28433, now seen corresponding path program 1 times [2023-09-01 04:14:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:53,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664824133] [2023-09-01 04:14:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:53,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:53,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 04:14:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:14:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:53,539 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:14:53,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:14:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:53,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:53,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664824133] [2023-09-01 04:14:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664824133] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:53,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:53,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585133650] [2023-09-01 04:14:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:53,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:53,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:53,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:53,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-09-01 04:14:53,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:53,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:53,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-09-01 04:14:53,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:54,171 INFO L130 PetriNetUnfolder]: 597/840 cut-off events. [2023-09-01 04:14:54,171 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 04:14:54,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 840 events. 597/840 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3621 event pairs, 286 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 1466. Up to 834 conditions per place. [2023-09-01 04:14:54,177 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-09-01 04:14:54,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 144 flow [2023-09-01 04:14:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-09-01 04:14:54,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390415785764623 [2023-09-01 04:14:54,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-09-01 04:14:54,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-09-01 04:14:54,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:54,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-09-01 04:14:54,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,208 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 3 states and 623 transitions. [2023-09-01 04:14:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 144 flow [2023-09-01 04:14:54,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:14:54,242 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 74 flow [2023-09-01 04:14:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, 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=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-09-01 04:14:54,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-09-01 04:14:54,262 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 74 flow [2023-09-01 04:14:54,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:54,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:14:54,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:54,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:54,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:14:54,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 28551, now seen corresponding path program 1 times [2023-09-01 04:14:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865185256] [2023-09-01 04:14:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:54,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:54,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:54,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 04:14:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:14:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:54,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:54,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865185256] [2023-09-01 04:14:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865185256] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895746286] [2023-09-01 04:14:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:54,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 473 [2023-09-01 04:14:54,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:54,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 473 [2023-09-01 04:14:54,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:54,978 INFO L130 PetriNetUnfolder]: 597/842 cut-off events. [2023-09-01 04:14:54,978 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:14:54,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 842 events. 597/842 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3618 event pairs, 286 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 1682. Up to 835 conditions per place. [2023-09-01 04:14:54,983 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-09-01 04:14:54,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 146 flow [2023-09-01 04:14:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-09-01 04:14:54,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44256518675123324 [2023-09-01 04:14:54,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-09-01 04:14:54,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-09-01 04:14:54,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:54,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-09-01 04:14:54,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,994 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 74 flow. Second operand 3 states and 628 transitions. [2023-09-01 04:14:54,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 146 flow [2023-09-01 04:14:54,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:54,996 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 89 flow [2023-09-01 04:14:54,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=73, 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=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-09-01 04:14:54,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-09-01 04:14:54,997 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 89 flow [2023-09-01 04:14:54,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:54,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:54,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:14:55,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:55,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:55,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:14:55,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash 28434, now seen corresponding path program 1 times [2023-09-01 04:14:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:55,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504696652] [2023-09-01 04:14:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:55,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:55,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:55,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 04:14:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:14:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:55,358 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:55,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:55,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:55,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504696652] [2023-09-01 04:14:55,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504696652] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:55,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:55,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077326892] [2023-09-01 04:14:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:55,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:55,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 473 [2023-09-01 04:14:55,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:55,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:55,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 473 [2023-09-01 04:14:55,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:56,029 INFO L130 PetriNetUnfolder]: 597/841 cut-off events. [2023-09-01 04:14:56,030 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:14:56,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 841 events. 597/841 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3611 event pairs, 286 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 1686. Up to 835 conditions per place. [2023-09-01 04:14:56,034 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-09-01 04:14:56,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 155 flow [2023-09-01 04:14:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:56,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-09-01 04:14:56,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383368569415081 [2023-09-01 04:14:56,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-09-01 04:14:56,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-09-01 04:14:56,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:56,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-09-01 04:14:56,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:56,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:56,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:56,044 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 89 flow. Second operand 3 states and 622 transitions. [2023-09-01 04:14:56,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 155 flow [2023-09-01 04:14:56,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:56,046 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 93 flow [2023-09-01 04:14:56,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-09-01 04:14:56,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-09-01 04:14:56,047 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 93 flow [2023-09-01 04:14:56,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:56,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:56,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:14:56,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:56,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:14:56,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 885243, now seen corresponding path program 1 times [2023-09-01 04:14:56,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:56,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793737657] [2023-09-01 04:14:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:56,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:56,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 04:14:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:56,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:14:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:56,387 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:56,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:56,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:56,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:56,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793737657] [2023-09-01 04:14:56,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793737657] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:56,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:56,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:14:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897638734] [2023-09-01 04:14:56,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:56,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:14:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:14:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:14:57,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 473 [2023-09-01 04:14:57,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:57,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:57,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 473 [2023-09-01 04:14:57,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:58,532 INFO L130 PetriNetUnfolder]: 1199/1687 cut-off events. [2023-09-01 04:14:58,533 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:14:58,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3401 conditions, 1687 events. 1199/1687 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 8220 event pairs, 572 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 3391. Up to 838 conditions per place. [2023-09-01 04:14:58,541 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 60 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-09-01 04:14:58,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 339 flow [2023-09-01 04:14:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:14:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:14:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2023-09-01 04:14:58,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277660324171952 [2023-09-01 04:14:58,546 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2023-09-01 04:14:58,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2023-09-01 04:14:58,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:58,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2023-09-01 04:14:58,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:58,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:58,555 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:58,555 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 93 flow. Second operand 6 states and 1214 transitions. [2023-09-01 04:14:58,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 339 flow [2023-09-01 04:14:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 73 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:14:58,557 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 187 flow [2023-09-01 04:14:58,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-09-01 04:14:58,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-09-01 04:14:58,559 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 187 flow [2023-09-01 04:14:58,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:58,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:58,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:14:58,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:58,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:58,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:14:58,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash 885360, now seen corresponding path program 1 times [2023-09-01 04:14:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:58,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100128810] [2023-09-01 04:14:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:58,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:58,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:58,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 04:14:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:14:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:58,882 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-09-01 04:14:58,887 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 33 [2023-09-01 04:14:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:58,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:58,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100128810] [2023-09-01 04:14:58,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100128810] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:58,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:58,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000511729] [2023-09-01 04:14:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:58,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:59,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-09-01 04:14:59,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 187 flow. Second operand has 3 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) [2023-09-01 04:14:59,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:59,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-09-01 04:14:59,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:59,436 INFO L130 PetriNetUnfolder]: 903/1299 cut-off events. [2023-09-01 04:14:59,436 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 04:14:59,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 1299 events. 903/1299 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 6297 event pairs, 430 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 2637. Up to 1287 conditions per place. [2023-09-01 04:14:59,442 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 04:14:59,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 237 flow [2023-09-01 04:14:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-09-01 04:14:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284707540521494 [2023-09-01 04:14:59,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-09-01 04:14:59,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-09-01 04:14:59,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:59,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-09-01 04:14:59,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:59,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:59,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:59,450 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 187 flow. Second operand 3 states and 608 transitions. [2023-09-01 04:14:59,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 237 flow [2023-09-01 04:14:59,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 221 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:59,454 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 147 flow [2023-09-01 04:14:59,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-09-01 04:14:59,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-09-01 04:14:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 147 flow [2023-09-01 04:14:59,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-09-01 04:14:59,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:59,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:14:59,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:59,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:14:59,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 885361, now seen corresponding path program 1 times [2023-09-01 04:14:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:59,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721209751] [2023-09-01 04:14:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:59,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:59,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:59,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 04:14:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:59,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:14:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:14:59,821 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-09-01 04:14:59,822 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 [2023-09-01 04:14:59,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 04:14:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:59,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:59,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721209751] [2023-09-01 04:14:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721209751] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:59,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:59,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900571917] [2023-09-01 04:14:59,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:59,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:59,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:15:00,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-09-01 04:15:00,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:00,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:00,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-09-01 04:15:00,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:00,438 INFO L130 PetriNetUnfolder]: 607/911 cut-off events. [2023-09-01 04:15:00,439 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:15:00,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 911 events. 607/911 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 4345 event pairs, 288 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1844. Up to 899 conditions per place. [2023-09-01 04:15:00,443 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-09-01 04:15:00,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 193 flow [2023-09-01 04:15:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:15:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:15:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-09-01 04:15:00,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334038054968288 [2023-09-01 04:15:00,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-09-01 04:15:00,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-09-01 04:15:00,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-09-01 04:15:00,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:00,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:00,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:00,451 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 147 flow. Second operand 3 states and 615 transitions. [2023-09-01 04:15:00,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 193 flow [2023-09-01 04:15:00,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:00,452 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 126 flow [2023-09-01 04:15:00,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-09-01 04:15:00,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-09-01 04:15:00,453 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 126 flow [2023-09-01 04:15:00,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:00,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:00,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:15:00,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:00,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:00,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:00,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 850849787, now seen corresponding path program 1 times [2023-09-01 04:15:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:00,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235690125] [2023-09-01 04:15:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:00,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:00,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:00,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 04:15:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:00,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:15:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:00,776 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 04:15:00,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-09-01 04:15:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:00,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:00,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:00,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235690125] [2023-09-01 04:15:00,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235690125] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:00,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:00,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:15:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615947585] [2023-09-01 04:15:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:15:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:15:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:15:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-09-01 04:15:00,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:00,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:00,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-09-01 04:15:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:01,248 INFO L130 PetriNetUnfolder]: 561/837 cut-off events. [2023-09-01 04:15:01,249 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:15:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 837 events. 561/837 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3902 event pairs, 266 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 1696. Up to 825 conditions per place. [2023-09-01 04:15:01,253 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-09-01 04:15:01,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 186 flow [2023-09-01 04:15:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:15:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:15:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-09-01 04:15:01,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42565186751233264 [2023-09-01 04:15:01,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-09-01 04:15:01,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-09-01 04:15:01,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:01,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-09-01 04:15:01,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,260 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 126 flow. Second operand 3 states and 604 transitions. [2023-09-01 04:15:01,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 186 flow [2023-09-01 04:15:01,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:01,261 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 123 flow [2023-09-01 04:15:01,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=123, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-09-01 04:15:01,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-09-01 04:15:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 123 flow [2023-09-01 04:15:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:01,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:15:01,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:01,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:01,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:01,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:01,475 INFO L85 PathProgramCache]: Analyzing trace with hash 850849788, now seen corresponding path program 1 times [2023-09-01 04:15:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:01,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964350368] [2023-09-01 04:15:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:01,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:01,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:01,477 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:01,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 04:15:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 04:15:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:01,612 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:15:01,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:15:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:01,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:01,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964350368] [2023-09-01 04:15:01,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964350368] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:01,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:01,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:15:01,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681930736] [2023-09-01 04:15:01,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:01,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:15:01,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:15:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:15:02,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-09-01 04:15:02,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 187.25) internal successors, (1498), 8 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:02,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-09-01 04:15:02,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:03,480 INFO L130 PetriNetUnfolder]: 515/763 cut-off events. [2023-09-01 04:15:03,480 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:15:03,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 763 events. 515/763 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3442 event pairs, 244 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 1548. Up to 378 conditions per place. [2023-09-01 04:15:03,484 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 48 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-09-01 04:15:03,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 273 flow [2023-09-01 04:15:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:15:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:15:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 981 transitions. [2023-09-01 04:15:03,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147991543340381 [2023-09-01 04:15:03,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 981 transitions. [2023-09-01 04:15:03,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 981 transitions. [2023-09-01 04:15:03,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:03,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 981 transitions. [2023-09-01 04:15:03,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,496 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,496 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 123 flow. Second operand 5 states and 981 transitions. [2023-09-01 04:15:03,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 273 flow [2023-09-01 04:15:03,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:03,498 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 124 flow [2023-09-01 04:15:03,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-09-01 04:15:03,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-09-01 04:15:03,500 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 124 flow [2023-09-01 04:15:03,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.25) internal successors, (1498), 8 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:03,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:15:03,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:03,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:03,711 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:03,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 606531938, now seen corresponding path program 1 times [2023-09-01 04:15:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:03,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794871984] [2023-09-01 04:15:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:03,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:03,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 04:15:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:15:03,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:03,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:04,003 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 [2023-09-01 04:15:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:04,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794871984] [2023-09-01 04:15:04,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794871984] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:04,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:04,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:15:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151509245] [2023-09-01 04:15:04,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:04,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:15:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:15:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:15:05,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-09-01 04:15:05,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 188.25) internal successors, (1506), 8 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:05,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:05,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-09-01 04:15:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:06,538 INFO L130 PetriNetUnfolder]: 681/1051 cut-off events. [2023-09-01 04:15:06,538 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 04:15:06,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 1051 events. 681/1051 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5388 event pairs, 213 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 2134. Up to 647 conditions per place. [2023-09-01 04:15:06,544 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 59 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2023-09-01 04:15:06,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 349 flow [2023-09-01 04:15:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:15:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:15:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1375 transitions. [2023-09-01 04:15:06,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2023-09-01 04:15:06,550 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1375 transitions. [2023-09-01 04:15:06,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1375 transitions. [2023-09-01 04:15:06,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:06,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1375 transitions. [2023-09-01 04:15:06,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.42857142857142) internal successors, (1375), 7 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,573 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 124 flow. Second operand 7 states and 1375 transitions. [2023-09-01 04:15:06,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 349 flow [2023-09-01 04:15:06,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:15:06,574 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 161 flow [2023-09-01 04:15:06,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-09-01 04:15:06,575 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-09-01 04:15:06,575 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 161 flow [2023-09-01 04:15:06,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.25) internal successors, (1506), 8 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:06,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:15:06,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:06,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:06,788 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:06,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash 606531937, now seen corresponding path program 1 times [2023-09-01 04:15:06,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997557720] [2023-09-01 04:15:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:06,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:06,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:06,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:06,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 04:15:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:15:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:06,867 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:15:06,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:15:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:06,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:06,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997557720] [2023-09-01 04:15:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997557720] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:06,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:15:06,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342524145] [2023-09-01 04:15:06,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:06,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:15:07,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 473 [2023-09-01 04:15:07,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:07,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 473 [2023-09-01 04:15:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:07,324 INFO L130 PetriNetUnfolder]: 431/693 cut-off events. [2023-09-01 04:15:07,324 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 04:15:07,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 693 events. 431/693 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 3469 event pairs, 246 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 1587. Up to 676 conditions per place. [2023-09-01 04:15:07,328 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 26 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-09-01 04:15:07,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 33 transitions, 219 flow [2023-09-01 04:15:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-09-01 04:15:07,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2023-09-01 04:15:07,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-09-01 04:15:07,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-09-01 04:15:07,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:07,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-09-01 04:15:07,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,336 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,336 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 161 flow. Second operand 4 states and 748 transitions. [2023-09-01 04:15:07,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 33 transitions, 219 flow [2023-09-01 04:15:07,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 33 transitions, 205 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 04:15:07,340 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 153 flow [2023-09-01 04:15:07,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-09-01 04:15:07,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-09-01 04:15:07,341 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 153 flow [2023-09-01 04:15:07,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:07,342 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:15:07,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:07,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:07,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:07,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash 606232914, now seen corresponding path program 2 times [2023-09-01 04:15:07,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:07,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350981270] [2023-09-01 04:15:07,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:15:07,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:07,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:07,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:07,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 04:15:07,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:15:07,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:15:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:07,673 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:15:07,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:15:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:07,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:08,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:08,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350981270] [2023-09-01 04:15:08,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350981270] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:08,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:08,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:15:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826762783] [2023-09-01 04:15:08,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:08,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:15:08,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:08,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:15:08,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:15:11,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 473 [2023-09-01 04:15:11,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 153 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:11,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:11,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 473 [2023-09-01 04:15:11,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:15,541 INFO L130 PetriNetUnfolder]: 1928/3092 cut-off events. [2023-09-01 04:15:15,541 INFO L131 PetriNetUnfolder]: For 859/859 co-relation queries the response was YES. [2023-09-01 04:15:15,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7036 conditions, 3092 events. 1928/3092 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18848 event pairs, 1107 based on Foata normal form. 6/1801 useless extension candidates. Maximal degree in co-relation 7015. Up to 339 conditions per place. [2023-09-01 04:15:15,553 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-09-01 04:15:15,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 196 transitions, 1034 flow [2023-09-01 04:15:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:15:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:15:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2483 transitions. [2023-09-01 04:15:15,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745595489781536 [2023-09-01 04:15:15,561 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2483 transitions. [2023-09-01 04:15:15,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2483 transitions. [2023-09-01 04:15:15,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:15,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2483 transitions. [2023-09-01 04:15:15,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.91666666666666) internal successors, (2483), 12 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:15,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:15,575 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:15,576 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 153 flow. Second operand 12 states and 2483 transitions. [2023-09-01 04:15:15,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 196 transitions, 1034 flow [2023-09-01 04:15:15,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 196 transitions, 1022 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:15:15,580 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 237 flow [2023-09-01 04:15:15,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-09-01 04:15:15,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-09-01 04:15:15,581 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 237 flow [2023-09-01 04:15:15,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:15,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:15,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:15,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:15,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:15,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:15,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1622621674, now seen corresponding path program 1 times [2023-09-01 04:15:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:15,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977520465] [2023-09-01 04:15:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:15,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:15,795 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:15,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:15:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:15:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:15,922 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:15:15,922 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 14 treesize of output 29 [2023-09-01 04:15:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:16,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:16,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:16,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977520465] [2023-09-01 04:15:16,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977520465] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:16,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:15:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967499835] [2023-09-01 04:15:16,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:16,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:15:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:15:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:15:24,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-09-01 04:15:24,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:24,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:24,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-09-01 04:15:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:27,761 INFO L130 PetriNetUnfolder]: 1457/2387 cut-off events. [2023-09-01 04:15:27,762 INFO L131 PetriNetUnfolder]: For 693/693 co-relation queries the response was YES. [2023-09-01 04:15:27,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5469 conditions, 2387 events. 1457/2387 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14162 event pairs, 828 based on Foata normal form. 21/1484 useless extension candidates. Maximal degree in co-relation 5441. Up to 2023 conditions per place. [2023-09-01 04:15:27,770 INFO L137 encePairwiseOnDemand]: 463/473 looper letters, 52 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-09-01 04:15:27,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 428 flow [2023-09-01 04:15:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:15:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:15:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1739 transitions. [2023-09-01 04:15:27,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085036410617806 [2023-09-01 04:15:27,776 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1739 transitions. [2023-09-01 04:15:27,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1739 transitions. [2023-09-01 04:15:27,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:27,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1739 transitions. [2023-09-01 04:15:27,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.22222222222223) internal successors, (1739), 9 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:27,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:27,786 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:27,786 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 237 flow. Second operand 9 states and 1739 transitions. [2023-09-01 04:15:27,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 428 flow [2023-09-01 04:15:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 415 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 04:15:27,790 INFO L231 Difference]: Finished difference. Result has 71 places, 40 transitions, 273 flow [2023-09-01 04:15:27,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=273, PETRI_PLACES=71, PETRI_TRANSITIONS=40} [2023-09-01 04:15:27,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2023-09-01 04:15:27,790 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 40 transitions, 273 flow [2023-09-01 04:15:27,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:27,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:27,792 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:27,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:28,002 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:28,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1508992575, now seen corresponding path program 2 times [2023-09-01 04:15:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877617939] [2023-09-01 04:15:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:15:28,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:28,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:28,004 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:28,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:15:28,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:15:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:28,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 04:15:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:28,146 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:15:28,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:15:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 04:15:28,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:28,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877617939] [2023-09-01 04:15:28,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877617939] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:28,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:28,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:15:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270519029] [2023-09-01 04:15:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:28,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:28,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:28,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:15:28,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-09-01 04:15:28,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 40 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:28,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:28,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-09-01 04:15:28,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:28,787 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-09-01 04:15:28,787 INFO L131 PetriNetUnfolder]: For 962/962 co-relation queries the response was YES. [2023-09-01 04:15:28,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 977 events. 515/977 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5395 event pairs, 270 based on Foata normal form. 162/959 useless extension candidates. Maximal degree in co-relation 2234. Up to 919 conditions per place. [2023-09-01 04:15:28,791 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-09-01 04:15:28,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-09-01 04:15:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 790 transitions. [2023-09-01 04:15:28,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175475687103594 [2023-09-01 04:15:28,794 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 790 transitions. [2023-09-01 04:15:28,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 790 transitions. [2023-09-01 04:15:28,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:28,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 790 transitions. [2023-09-01 04:15:28,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.5) internal successors, (790), 4 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:28,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:28,799 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:28,799 INFO L175 Difference]: Start difference. First operand has 71 places, 40 transitions, 273 flow. Second operand 4 states and 790 transitions. [2023-09-01 04:15:28,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-09-01 04:15:28,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-09-01 04:15:28,801 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-09-01 04:15:28,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-09-01 04:15:28,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-09-01 04:15:28,803 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-09-01 04:15:28,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:28,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:28,804 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 04:15:28,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:29,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:29,013 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:15:29,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1241804978, now seen corresponding path program 3 times [2023-09-01 04:15:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:29,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777835987] [2023-09-01 04:15:29,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:15:29,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:29,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:29,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:29,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:15:29,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 04:15:29,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:15:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:29,220 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:15:29,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:15:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:29,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:31,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:31,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777835987] [2023-09-01 04:15:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777835987] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:31,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:15:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259286364] [2023-09-01 04:15:31,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:31,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:15:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:15:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:15:48,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 473 [2023-09-01 04:15:48,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 192.0) internal successors, (4608), 24 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:48,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:48,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 473 [2023-09-01 04:15:48,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:03,256 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-09-01 04:16:03,256 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-09-01 04:16:03,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5021 conditions, 2273 events. 1199/2273 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 13399 event pairs, 630 based on Foata normal form. 12/1865 useless extension candidates. Maximal degree in co-relation 4999. Up to 504 conditions per place. [2023-09-01 04:16:03,264 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-09-01 04:16:03,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-09-01 04:16:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:16:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:16:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4895 transitions. [2023-09-01 04:16:03,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312015503875969 [2023-09-01 04:16:03,274 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4895 transitions. [2023-09-01 04:16:03,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4895 transitions. [2023-09-01 04:16:03,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:03,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4895 transitions. [2023-09-01 04:16:03,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 203.95833333333334) internal successors, (4895), 24 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:03,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:03,309 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:03,309 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 4895 transitions. [2023-09-01 04:16:03,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-09-01 04:16:03,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:16:03,315 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-09-01 04:16:03,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, 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=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-09-01 04:16:03,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-09-01 04:16:03,316 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-09-01 04:16:03,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 192.0) internal successors, (4608), 24 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:03,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:03,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:03,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-09-01 04:16:03,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:03,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:03,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash -902556325, now seen corresponding path program 1 times [2023-09-01 04:16:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190121109] [2023-09-01 04:16:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:16:03,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:03,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 04:16:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:16:03,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:16:03,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:03,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:16:03,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:03,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190121109] [2023-09-01 04:16:03,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190121109] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:16:03,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:16:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:16:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370911531] [2023-09-01 04:16:03,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:16:03,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:16:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:03,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:16:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:16:03,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-09-01 04:16:03,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:03,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:03,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-09-01 04:16:03,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:04,096 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-09-01 04:16:04,096 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-09-01 04:16:04,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 16670 event pairs, 273 based on Foata normal form. 21/2273 useless extension candidates. Maximal degree in co-relation 6152. Up to 2101 conditions per place. [2023-09-01 04:16:04,116 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-09-01 04:16:04,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-09-01 04:16:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:16:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:16:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-09-01 04:16:04,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2023-09-01 04:16:04,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-09-01 04:16:04,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-09-01 04:16:04,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:04,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-09-01 04:16:04,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:04,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:04,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:04,123 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 612 transitions. [2023-09-01 04:16:04,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-09-01 04:16:04,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-09-01 04:16:04,128 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-09-01 04:16:04,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, 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=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-09-01 04:16:04,128 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-09-01 04:16:04,128 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-09-01 04:16:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:04,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:04,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:04,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:04,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:04,338 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:04,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2011352495, now seen corresponding path program 1 times [2023-09-01 04:16:04,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:04,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413099408] [2023-09-01 04:16:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:16:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:04,340 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:04,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 04:16:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:16:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:16:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:04,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:16:04,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:04,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413099408] [2023-09-01 04:16:04,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413099408] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:16:04,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:16:04,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 04:16:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514408768] [2023-09-01 04:16:04,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:16:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:16:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:16:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:16:04,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 473 [2023-09-01 04:16:04,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:04,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:04,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 473 [2023-09-01 04:16:04,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:05,214 INFO L130 PetriNetUnfolder]: 1683/3367 cut-off events. [2023-09-01 04:16:05,214 INFO L131 PetriNetUnfolder]: For 1073/1073 co-relation queries the response was YES. [2023-09-01 04:16:05,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 3367 events. 1683/3367 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 21439 event pairs, 520 based on Foata normal form. 240/3607 useless extension candidates. Maximal degree in co-relation 8251. Up to 1662 conditions per place. [2023-09-01 04:16:05,228 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 52 selfloop transitions, 12 changer transitions 8/72 dead transitions. [2023-09-01 04:16:05,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 72 transitions, 553 flow [2023-09-01 04:16:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:16:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:16:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1170 transitions. [2023-09-01 04:16:05,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2023-09-01 04:16:05,233 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1170 transitions. [2023-09-01 04:16:05,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1170 transitions. [2023-09-01 04:16:05,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:05,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1170 transitions. [2023-09-01 04:16:05,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:05,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:05,240 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:05,240 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 6 states and 1170 transitions. [2023-09-01 04:16:05,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 72 transitions, 553 flow [2023-09-01 04:16:05,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 72 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:16:05,246 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 391 flow [2023-09-01 04:16:05,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2023-09-01 04:16:05,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-09-01 04:16:05,247 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 391 flow [2023-09-01 04:16:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:05,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:05,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:05,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:05,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:05,457 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:05,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 662331537, now seen corresponding path program 2 times [2023-09-01 04:16:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682915699] [2023-09-01 04:16:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:16:05,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:05,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:05,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 04:16:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:16:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:16:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:16:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:05,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:16:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:05,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:05,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682915699] [2023-09-01 04:16:05,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682915699] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:16:05,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:16:05,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-09-01 04:16:05,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961507961] [2023-09-01 04:16:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:16:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:16:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:16:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:16:05,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-09-01 04:16:05,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:05,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:05,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-09-01 04:16:05,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:06,361 INFO L130 PetriNetUnfolder]: 1683/3227 cut-off events. [2023-09-01 04:16:06,361 INFO L131 PetriNetUnfolder]: For 3619/3783 co-relation queries the response was YES. [2023-09-01 04:16:06,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9953 conditions, 3227 events. 1683/3227 cut-off events. For 3619/3783 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19785 event pairs, 480 based on Foata normal form. 83/3290 useless extension candidates. Maximal degree in co-relation 9913. Up to 2080 conditions per place. [2023-09-01 04:16:06,378 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-09-01 04:16:06,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 65 transitions, 575 flow [2023-09-01 04:16:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:16:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:16:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 809 transitions. [2023-09-01 04:16:06,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275898520084567 [2023-09-01 04:16:06,383 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 809 transitions. [2023-09-01 04:16:06,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 809 transitions. [2023-09-01 04:16:06,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:06,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 809 transitions. [2023-09-01 04:16:06,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:06,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:06,388 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:06,388 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 391 flow. Second operand 4 states and 809 transitions. [2023-09-01 04:16:06,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 65 transitions, 575 flow [2023-09-01 04:16:06,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 65 transitions, 541 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 04:16:06,396 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 409 flow [2023-09-01 04:16:06,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=409, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-09-01 04:16:06,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2023-09-01 04:16:06,396 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 409 flow [2023-09-01 04:16:06,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:06,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:06,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:06,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:06,608 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:06,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash 570017975, now seen corresponding path program 1 times [2023-09-01 04:16:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607030998] [2023-09-01 04:16:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:16:06,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:06,609 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:06,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 04:16:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:16:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:16:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:06,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:16:06,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:06,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607030998] [2023-09-01 04:16:06,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607030998] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:16:06,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:16:06,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 04:16:06,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842749131] [2023-09-01 04:16:06,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:16:06,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:16:06,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:06,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:16:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:16:06,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-09-01 04:16:06,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:06,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:06,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-09-01 04:16:06,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:07,469 INFO L130 PetriNetUnfolder]: 1883/3727 cut-off events. [2023-09-01 04:16:07,469 INFO L131 PetriNetUnfolder]: For 5153/5153 co-relation queries the response was YES. [2023-09-01 04:16:07,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11892 conditions, 3727 events. 1883/3727 cut-off events. For 5153/5153 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 23469 event pairs, 520 based on Foata normal form. 40/3767 useless extension candidates. Maximal degree in co-relation 11851. Up to 1782 conditions per place. [2023-09-01 04:16:07,490 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 52 selfloop transitions, 19 changer transitions 10/81 dead transitions. [2023-09-01 04:16:07,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 81 transitions, 679 flow [2023-09-01 04:16:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:16:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:16:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1355 transitions. [2023-09-01 04:16:07,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40924192086982786 [2023-09-01 04:16:07,495 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1355 transitions. [2023-09-01 04:16:07,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1355 transitions. [2023-09-01 04:16:07,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:07,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1355 transitions. [2023-09-01 04:16:07,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.57142857142858) internal successors, (1355), 7 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:07,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:07,502 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:07,502 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 409 flow. Second operand 7 states and 1355 transitions. [2023-09-01 04:16:07,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 81 transitions, 679 flow [2023-09-01 04:16:07,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 81 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:16:07,516 INFO L231 Difference]: Finished difference. Result has 96 places, 58 transitions, 493 flow [2023-09-01 04:16:07,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=96, PETRI_TRANSITIONS=58} [2023-09-01 04:16:07,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2023-09-01 04:16:07,517 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 58 transitions, 493 flow [2023-09-01 04:16:07,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:07,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:07,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:07,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:07,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:07,728 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:07,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:07,729 INFO L85 PathProgramCache]: Analyzing trace with hash 286698499, now seen corresponding path program 3 times [2023-09-01 04:16:07,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:07,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817263908] [2023-09-01 04:16:07,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:16:07,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:07,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:07,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 04:16:07,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:16:07,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:16:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:16:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:07,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:16:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:08,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817263908] [2023-09-01 04:16:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817263908] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:16:08,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:16:08,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-09-01 04:16:08,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648088608] [2023-09-01 04:16:08,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:16:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:16:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:16:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:16:08,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-09-01 04:16:08,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 58 transitions, 493 flow. Second operand has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:08,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:08,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-09-01 04:16:08,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:09,632 INFO L130 PetriNetUnfolder]: 3043/5947 cut-off events. [2023-09-01 04:16:09,632 INFO L131 PetriNetUnfolder]: For 12297/12297 co-relation queries the response was YES. [2023-09-01 04:16:09,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22376 conditions, 5947 events. 3043/5947 cut-off events. For 12297/12297 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 40136 event pairs, 360 based on Foata normal form. 480/6427 useless extension candidates. Maximal degree in co-relation 22333. Up to 2302 conditions per place. [2023-09-01 04:16:09,663 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 79 selfloop transitions, 52 changer transitions 4/135 dead transitions. [2023-09-01 04:16:09,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 135 transitions, 1222 flow [2023-09-01 04:16:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 04:16:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 04:16:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2517 transitions. [2023-09-01 04:16:09,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093348511953163 [2023-09-01 04:16:09,668 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2517 transitions. [2023-09-01 04:16:09,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2517 transitions. [2023-09-01 04:16:09,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:09,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2517 transitions. [2023-09-01 04:16:09,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.6153846153846) internal successors, (2517), 13 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,679 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,679 INFO L175 Difference]: Start difference. First operand has 96 places, 58 transitions, 493 flow. Second operand 13 states and 2517 transitions. [2023-09-01 04:16:09,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 135 transitions, 1222 flow [2023-09-01 04:16:09,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1141 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 04:16:09,708 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 976 flow [2023-09-01 04:16:09,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=976, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2023-09-01 04:16:09,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2023-09-01 04:16:09,709 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 976 flow [2023-09-01 04:16:09,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:09,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:09,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:09,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:09,920 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:09,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1748527785, now seen corresponding path program 2 times [2023-09-01 04:16:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:09,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253668475] [2023-09-01 04:16:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:16:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:09,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:09,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:09,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 04:16:10,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:16:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:16:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:16:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:10,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:16:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:10,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253668475] [2023-09-01 04:16:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253668475] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:16:10,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:16:10,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-09-01 04:16:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921507307] [2023-09-01 04:16:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:16:10,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:16:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:16:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 04:16:10,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 473 [2023-09-01 04:16:10,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 976 flow. Second operand has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:10,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:10,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 473 [2023-09-01 04:16:10,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:11,235 INFO L130 PetriNetUnfolder]: 2943/5767 cut-off events. [2023-09-01 04:16:11,235 INFO L131 PetriNetUnfolder]: For 20568/20708 co-relation queries the response was YES. [2023-09-01 04:16:11,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 5767 events. 2943/5767 cut-off events. For 20568/20708 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 39111 event pairs, 344 based on Foata normal form. 220/5987 useless extension candidates. Maximal degree in co-relation 27173. Up to 4120 conditions per place. [2023-09-01 04:16:11,268 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 91 selfloop transitions, 14 changer transitions 4/114 dead transitions. [2023-09-01 04:16:11,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 1260 flow [2023-09-01 04:16:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:16:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:16:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 795 transitions. [2023-09-01 04:16:11,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201902748414376 [2023-09-01 04:16:11,272 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 795 transitions. [2023-09-01 04:16:11,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 795 transitions. [2023-09-01 04:16:11,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:11,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 795 transitions. [2023-09-01 04:16:11,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:11,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:11,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:11,276 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 976 flow. Second operand 4 states and 795 transitions. [2023-09-01 04:16:11,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 1260 flow [2023-09-01 04:16:11,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 1168 flow, removed 43 selfloop flow, removed 1 redundant places. [2023-09-01 04:16:11,382 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 949 flow [2023-09-01 04:16:11,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2023-09-01 04:16:11,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2023-09-01 04:16:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 949 flow [2023-09-01 04:16:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:11,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:11,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:11,393 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 (21)] Ended with exit code 0 [2023-09-01 04:16:11,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:11,593 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:11,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1394923695, now seen corresponding path program 4 times [2023-09-01 04:16:11,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:11,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441672767] [2023-09-01 04:16:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:16:11,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:11,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:11,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 04:16:11,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:16:11,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:16:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:16:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:11,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:16:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:16:11,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:11,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441672767] [2023-09-01 04:16:11,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441672767] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:16:11,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:16:11,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-09-01 04:16:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520407236] [2023-09-01 04:16:11,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:16:11,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 04:16:11,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:11,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 04:16:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-09-01 04:16:12,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-09-01 04:16:12,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 949 flow. Second operand has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:12,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:12,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-09-01 04:16:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:13,690 INFO L130 PetriNetUnfolder]: 3423/6487 cut-off events. [2023-09-01 04:16:13,691 INFO L131 PetriNetUnfolder]: For 25821/25821 co-relation queries the response was YES. [2023-09-01 04:16:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29244 conditions, 6487 events. 3423/6487 cut-off events. For 25821/25821 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 43292 event pairs, 520 based on Foata normal form. 440/6847 useless extension candidates. Maximal degree in co-relation 29193. Up to 2702 conditions per place. [2023-09-01 04:16:13,720 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 78 selfloop transitions, 59 changer transitions 4/141 dead transitions. [2023-09-01 04:16:13,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 141 transitions, 1465 flow [2023-09-01 04:16:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:16:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:16:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1931 transitions. [2023-09-01 04:16:13,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40824524312896404 [2023-09-01 04:16:13,723 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1931 transitions. [2023-09-01 04:16:13,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1931 transitions. [2023-09-01 04:16:13,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:13,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1931 transitions. [2023-09-01 04:16:13,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.1) internal successors, (1931), 10 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:13,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:13,730 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:13,730 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 949 flow. Second operand 10 states and 1931 transitions. [2023-09-01 04:16:13,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 141 transitions, 1465 flow [2023-09-01 04:16:13,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 141 transitions, 1446 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 04:16:13,846 INFO L231 Difference]: Finished difference. Result has 125 places, 114 transitions, 1231 flow [2023-09-01 04:16:13,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2023-09-01 04:16:13,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2023-09-01 04:16:13,847 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 1231 flow [2023-09-01 04:16:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:13,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:13,848 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:13,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:14,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:14,059 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:14,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash -516239137, now seen corresponding path program 3 times [2023-09-01 04:16:14,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:14,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41940992] [2023-09-01 04:16:14,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:16:14,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:14,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:14,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 04:16:14,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:16:14,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:16:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:16:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:16:14,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:16:14,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:14,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41940992] [2023-09-01 04:16:14,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41940992] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:16:14,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:16:14,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 04:16:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622893243] [2023-09-01 04:16:14,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:16:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:16:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:16:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:16:14,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 473 [2023-09-01 04:16:14,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 1231 flow. Second operand has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:14,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:14,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 473 [2023-09-01 04:16:14,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:15,196 INFO L130 PetriNetUnfolder]: 3103/5627 cut-off events. [2023-09-01 04:16:15,196 INFO L131 PetriNetUnfolder]: For 27771/27771 co-relation queries the response was YES. [2023-09-01 04:16:15,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 5627 events. 3103/5627 cut-off events. For 27771/27771 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 34159 event pairs, 960 based on Foata normal form. 80/5627 useless extension candidates. Maximal degree in co-relation 28815. Up to 4302 conditions per place. [2023-09-01 04:16:15,229 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 98 selfloop transitions, 17 changer transitions 5/120 dead transitions. [2023-09-01 04:16:15,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 120 transitions, 1492 flow [2023-09-01 04:16:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:16:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:16:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1159 transitions. [2023-09-01 04:16:15,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083861874559549 [2023-09-01 04:16:15,231 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1159 transitions. [2023-09-01 04:16:15,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1159 transitions. [2023-09-01 04:16:15,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:15,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1159 transitions. [2023-09-01 04:16:15,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:15,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:15,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:15,235 INFO L175 Difference]: Start difference. First operand has 125 places, 114 transitions, 1231 flow. Second operand 6 states and 1159 transitions. [2023-09-01 04:16:15,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 120 transitions, 1492 flow [2023-09-01 04:16:15,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 1359 flow, removed 36 selfloop flow, removed 7 redundant places. [2023-09-01 04:16:15,399 INFO L231 Difference]: Finished difference. Result has 123 places, 111 transitions, 1119 flow [2023-09-01 04:16:15,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=123, PETRI_TRANSITIONS=111} [2023-09-01 04:16:15,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2023-09-01 04:16:15,400 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 111 transitions, 1119 flow [2023-09-01 04:16:15,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:15,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:15,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:15,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:15,602 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:15,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash -933034719, now seen corresponding path program 1 times [2023-09-01 04:16:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:15,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248643822] [2023-09-01 04:16:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:16:15,603 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 [2023-09-01 04:16:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:15,604 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:15,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 04:16:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:16:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:16:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:16:15,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:16:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:16:15,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:15,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248643822] [2023-09-01 04:16:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248643822] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:16:15,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:16:15,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 04:16:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914011918] [2023-09-01 04:16:15,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:16:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:16:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:16:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:16:16,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-09-01 04:16:16,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 111 transitions, 1119 flow. Second operand has 10 states, 10 states have (on average 196.6) internal successors, (1966), 10 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:16,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:16:16,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-09-01 04:16:16,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:16:18,118 INFO L130 PetriNetUnfolder]: 4043/7287 cut-off events. [2023-09-01 04:16:18,118 INFO L131 PetriNetUnfolder]: For 27495/27735 co-relation queries the response was YES. [2023-09-01 04:16:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34109 conditions, 7287 events. 4043/7287 cut-off events. For 27495/27735 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 46871 event pairs, 200 based on Foata normal form. 1020/8187 useless extension candidates. Maximal degree in co-relation 34057. Up to 3002 conditions per place. [2023-09-01 04:16:18,159 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 100 selfloop transitions, 64 changer transitions 0/168 dead transitions. [2023-09-01 04:16:18,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 168 transitions, 1815 flow [2023-09-01 04:16:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:16:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:16:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1999 transitions. [2023-09-01 04:16:18,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226215644820296 [2023-09-01 04:16:18,162 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1999 transitions. [2023-09-01 04:16:18,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1999 transitions. [2023-09-01 04:16:18,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:18,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1999 transitions. [2023-09-01 04:16:18,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 199.9) internal successors, (1999), 10 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:18,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:18,166 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:18,166 INFO L175 Difference]: Start difference. First operand has 123 places, 111 transitions, 1119 flow. Second operand 10 states and 1999 transitions. [2023-09-01 04:16:18,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 168 transitions, 1815 flow [2023-09-01 04:16:18,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1681 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-09-01 04:16:18,295 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 1267 flow [2023-09-01 04:16:18,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1267, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2023-09-01 04:16:18,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2023-09-01 04:16:18,296 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 1267 flow [2023-09-01 04:16:18,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 196.6) internal successors, (1966), 10 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:18,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:16:18,296 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:16:18,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 04:16:18,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:18,497 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 04:16:18,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:16:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 96043941, now seen corresponding path program 2 times [2023-09-01 04:16:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:16:18,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758310558] [2023-09-01 04:16:18,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:16:18,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:16:18,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:16:18,499 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:16:18,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 04:16:18,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:16:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:16:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:16:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:16:25,391 WARN L222 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 780 DAG size of output: 204 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 04:16:25,393 INFO L321 Elim1Store]: treesize reduction 1224, result has 22.0 percent of original size [2023-09-01 04:16:25,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 36 new quantified variables, introduced 190 case distinctions, treesize of input 21313 treesize of output 583 [2023-09-01 04:26:09,468 WARN L222 SmtUtils]: Spent 23.19s on a formula simplification. DAG size of input: 3853 DAG size of output: 3880 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:26:19,348 WARN L222 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 3843 DAG size of output: 3843 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15